./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P --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 fc77cb5fe4af5100e01bafbf150d5df54332b351a9f9d4040d6b54bbf20f5710 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:24:33,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:24:33,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:24:33,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:24:33,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:24:33,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:24:33,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:24:33,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:24:33,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:24:33,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:24:33,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:24:33,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:24:33,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:24:33,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:24:33,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:24:33,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:24:33,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:24:33,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:24:33,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:24:33,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:24:33,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:24:33,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:24:33,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:24:33,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:24:33,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:24:33,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:24:33,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:24:33,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:24:33,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:24:33,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:24:33,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:24:33,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:24:33,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:24:33,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:24:33,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:24:33,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:24:33,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:24:33,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:24:33,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:24:33,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:24:33,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:24:33,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:24:33,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:24:33,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:24:33,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:24:33,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:24:33,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:24:33,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:24:33,460 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:24:33,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:24:33,460 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:24:33,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:24:33,461 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:24:33,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:24:33,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:24:33,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:24:33,462 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:24:33,462 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:24:33,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:24:33,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:24:33,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:24:33,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:24:33,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:24:33,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:24:33,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:24:33,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:24:33,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:24:33,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:24:33,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:24:33,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:24:33,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:24:33,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:24:33,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:24:33,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:24:33,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:24:33,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:24:33,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:24:33,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:24:33,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:24:33,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:24:33,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:24:33,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:24:33,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:24:33,468 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_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc77cb5fe4af5100e01bafbf150d5df54332b351a9f9d4040d6b54bbf20f5710 [2021-11-21 01:24:33,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:24:33,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:24:33,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:24:33,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:24:33,760 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:24:33,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-11-21 01:24:33,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/data/9c1f997a0/c0ba472d54444a03bc102a954c0c2784/FLAG660818e5e [2021-11-21 01:24:34,372 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:24:34,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-11-21 01:24:34,387 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/data/9c1f997a0/c0ba472d54444a03bc102a954c0c2784/FLAG660818e5e [2021-11-21 01:24:34,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/data/9c1f997a0/c0ba472d54444a03bc102a954c0c2784 [2021-11-21 01:24:34,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:24:34,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:24:34,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:24:34,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:24:34,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:24:34,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:24:34" (1/1) ... [2021-11-21 01:24:34,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb4639e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:34, skipping insertion in model container [2021-11-21 01:24:34,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:24:34" (1/1) ... [2021-11-21 01:24:34,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:24:34,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:24:34,958 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_ebea807c-3892-4b0a-a3e1-13012dd965dd/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c[576,589] [2021-11-21 01:24:34,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:24:34,983 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:24:34,995 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_ebea807c-3892-4b0a-a3e1-13012dd965dd/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound5.c[576,589] [2021-11-21 01:24:35,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:24:35,014 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:24:35,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35 WrapperNode [2021-11-21 01:24:35,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:24:35,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:24:35,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:24:35,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:24:35,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,049 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2021-11-21 01:24:35,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:24:35,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:24:35,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:24:35,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:24:35,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:24:35,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:24:35,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:24:35,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:24:35,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (1/1) ... [2021-11-21 01:24:35,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:24:35,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:35,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:24:35,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:24:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:24:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:24:35,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:24:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:24:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:24:35,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:24:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:24:35,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:24:35,220 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:24:35,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:24:35,334 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:24:35,355 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:24:35,356 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:24:35,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:24:35 BoogieIcfgContainer [2021-11-21 01:24:35,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:24:35,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:24:35,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:24:35,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:24:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:24:34" (1/3) ... [2021-11-21 01:24:35,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3195e2db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:24:35, skipping insertion in model container [2021-11-21 01:24:35,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:35" (2/3) ... [2021-11-21 01:24:35,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3195e2db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:24:35, skipping insertion in model container [2021-11-21 01:24:35,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:24:35" (3/3) ... [2021-11-21 01:24:35,367 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.c [2021-11-21 01:24:35,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:24:35,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:24:35,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:24:35,459 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 [2021-11-21 01:24:35,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:24:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:24:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:24:35,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:35,511 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:35,511 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1295267661, now seen corresponding path program 1 times [2021-11-21 01:24:35,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:35,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153538581] [2021-11-21 01:24:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:35,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:35,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:35,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063004287] [2021-11-21 01:24:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:35,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:35,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:35,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:35,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:24:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:24:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:24:36,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:24:36,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:36,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153538581] [2021-11-21 01:24:36,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063004287] [2021-11-21 01:24:36,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063004287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:36,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:36,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:24:36,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157143184] [2021-11-21 01:24:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:36,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:24:36,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:24:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:24:36,174 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:24:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:36,351 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2021-11-21 01:24:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:24:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-11-21 01:24:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:36,371 INFO L225 Difference]: With dead ends: 61 [2021-11-21 01:24:36,372 INFO L226 Difference]: Without dead ends: 36 [2021-11-21 01:24:36,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:24:36,384 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:36,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 138 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:24:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-21 01:24:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-21 01:24:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:24:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-21 01:24:36,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-11-21 01:24:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:36,438 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-21 01:24:36,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:24:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-21 01:24:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:24:36,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:36,440 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:36,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:36,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:36,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1188978483, now seen corresponding path program 1 times [2021-11-21 01:24:36,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330249986] [2021-11-21 01:24:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:36,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:36,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:36,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546218644] [2021-11-21 01:24:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:36,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:36,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:36,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:36,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:24:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:36,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:24:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:24:36,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:24:36,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:36,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330249986] [2021-11-21 01:24:36,984 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546218644] [2021-11-21 01:24:36,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546218644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:36,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:36,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:24:36,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832575518] [2021-11-21 01:24:36,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:36,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:24:36,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:24:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:24:36,995 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:24:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:37,136 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-11-21 01:24:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:24:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-11-21 01:24:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:37,138 INFO L225 Difference]: With dead ends: 50 [2021-11-21 01:24:37,138 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:24:37,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:24:37,141 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:37,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 127 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:24:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:24:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-21 01:24:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:24:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-11-21 01:24:37,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 22 [2021-11-21 01:24:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-11-21 01:24:37,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:24:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-11-21 01:24:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:24:37,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:37,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:37,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:37,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:37,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1634696502, now seen corresponding path program 1 times [2021-11-21 01:24:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272355557] [2021-11-21 01:24:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:37,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:37,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650255662] [2021-11-21 01:24:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:37,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:37,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:37,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:24:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:24:37,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:24:37,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:24:37,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272355557] [2021-11-21 01:24:37,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:37,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650255662] [2021-11-21 01:24:37,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650255662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:37,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:37,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:37,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555545263] [2021-11-21 01:24:37,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:37,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:37,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:37,570 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:24:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:37,652 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2021-11-21 01:24:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:24:37,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2021-11-21 01:24:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:37,656 INFO L225 Difference]: With dead ends: 72 [2021-11-21 01:24:37,656 INFO L226 Difference]: Without dead ends: 70 [2021-11-21 01:24:37,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:24:37,661 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:37,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:24:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-21 01:24:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-11-21 01:24:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-21 01:24:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-11-21 01:24:37,690 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 29 [2021-11-21 01:24:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:37,690 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-11-21 01:24:37,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:24:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-11-21 01:24:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:24:37,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:37,694 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:37,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:37,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:37,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:37,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586486, now seen corresponding path program 1 times [2021-11-21 01:24:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:37,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562348995] [2021-11-21 01:24:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:37,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:37,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:37,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426173700] [2021-11-21 01:24:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:37,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:37,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:37,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:37,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:24:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:24:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:24:38,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:24:38,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562348995] [2021-11-21 01:24:38,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426173700] [2021-11-21 01:24:38,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426173700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:38,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:38,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:24:38,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407105004] [2021-11-21 01:24:38,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:38,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:24:38,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:24:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:24:38,141 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:24:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:38,246 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2021-11-21 01:24:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:24:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2021-11-21 01:24:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:38,250 INFO L225 Difference]: With dead ends: 69 [2021-11-21 01:24:38,250 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 01:24:38,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:24:38,252 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:38,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:24:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 01:24:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-21 01:24:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-21 01:24:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-11-21 01:24:38,267 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 39 [2021-11-21 01:24:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:38,267 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-11-21 01:24:38,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:24:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-11-21 01:24:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:24:38,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:38,282 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:38,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:38,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:38,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:38,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1800198356, now seen corresponding path program 1 times [2021-11-21 01:24:38,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:38,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922222416] [2021-11-21 01:24:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:38,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:38,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:38,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400364263] [2021-11-21 01:24:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:38,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:38,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:38,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:24:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:24:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:24:38,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:24:39,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922222416] [2021-11-21 01:24:39,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400364263] [2021-11-21 01:24:39,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400364263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907625499] [2021-11-21 01:24:39,067 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-21 01:24:39,068 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:24:39,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:24:39,078 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:24:39,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:24:42,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2021-11-21 01:24:42,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2021-11-21 01:24:42,401 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:24:43,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [907625499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:43,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:24:43,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8, 8] total 22 [2021-11-21 01:24:43,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108514036] [2021-11-21 01:24:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:43,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:24:43,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:24:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:24:43,131 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:24:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:43,450 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-11-21 01:24:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:24:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2021-11-21 01:24:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:43,455 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:24:43,455 INFO L226 Difference]: Without dead ends: 86 [2021-11-21 01:24:43,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:24:43,458 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:43,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 57 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:24:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-21 01:24:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-21 01:24:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-21 01:24:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-11-21 01:24:43,501 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 45 [2021-11-21 01:24:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:43,503 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-11-21 01:24:43,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:24:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-11-21 01:24:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:24:43,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:43,505 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:43,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:43,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:43,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash 900265930, now seen corresponding path program 1 times [2021-11-21 01:24:43,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:43,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140478613] [2021-11-21 01:24:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:43,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:43,741 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878251375] [2021-11-21 01:24:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:43,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:43,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:43,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:24:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:24:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-21 01:24:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-21 01:24:44,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:44,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140478613] [2021-11-21 01:24:44,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:44,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878251375] [2021-11-21 01:24:44,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878251375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:44,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777854545] [2021-11-21 01:24:44,165 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-21 01:24:44,165 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:24:44,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:24:44,166 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:24:44,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:24:55,083 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2021-11-21 01:24:55,234 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2021-11-21 01:24:55,246 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:24:56,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [777854545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:56,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:24:56,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 7] total 21 [2021-11-21 01:24:56,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999173937] [2021-11-21 01:24:56,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:56,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:24:56,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:24:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:24:56,251 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:24:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:56,565 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-11-21 01:24:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:24:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2021-11-21 01:24:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:56,567 INFO L225 Difference]: With dead ends: 112 [2021-11-21 01:24:56,567 INFO L226 Difference]: Without dead ends: 109 [2021-11-21 01:24:56,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 125 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:24:56,569 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:56,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 54 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:24:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-21 01:24:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-11-21 01:24:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 01:24:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2021-11-21 01:24:56,601 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 52 [2021-11-21 01:24:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2021-11-21 01:24:56,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:24:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2021-11-21 01:24:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:24:56,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:56,606 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:56,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:56,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:24:56,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2023713010, now seen corresponding path program 1 times [2021-11-21 01:24:56,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:56,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201133989] [2021-11-21 01:24:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:56,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:56,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:56,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823862270] [2021-11-21 01:24:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:56,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:56,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:56,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:56,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:24:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:24:56,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-21 01:24:57,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-21 01:24:57,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:57,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201133989] [2021-11-21 01:24:57,273 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:57,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823862270] [2021-11-21 01:24:57,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823862270] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:57,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:24:57,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2021-11-21 01:24:57,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120551605] [2021-11-21 01:24:57,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:57,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:57,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:24:57,275 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:24:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:57,340 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2021-11-21 01:24:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:24:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-11-21 01:24:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:57,343 INFO L225 Difference]: With dead ends: 112 [2021-11-21 01:24:57,343 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 01:24:57,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:24:57,344 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:57,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 81 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:24:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 01:24:57,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-21 01:24:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 69 states have internal predecessors, (73), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 01:24:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2021-11-21 01:24:57,363 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 52 [2021-11-21 01:24:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:57,363 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2021-11-21 01:24:57,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:24:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2021-11-21 01:24:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:24:57,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:57,365 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:57,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:57,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:57,582 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1720968472, now seen corresponding path program 2 times [2021-11-21 01:24:57,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:57,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051627163] [2021-11-21 01:24:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:57,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:57,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:24:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786089197] [2021-11-21 01:24:57,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:24:57,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:57,598 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:57,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:24:57,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-21 01:24:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:24:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:24:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-21 01:24:57,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-21 01:24:57,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051627163] [2021-11-21 01:24:57,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:24:57,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786089197] [2021-11-21 01:24:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786089197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:57,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337083169] [2021-11-21 01:24:57,999 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-21 01:24:57,999 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:24:57,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:24:58,000 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:24:58,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:07,298 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2021-11-21 01:25:07,365 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2021-11-21 01:25:07,377 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:07,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:25:07,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:25:07,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-21 01:25:07,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247983685] [2021-11-21 01:25:07,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:07,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:25:07,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:25:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:25:07,999 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:25:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:08,188 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2021-11-21 01:25:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:25:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 68 [2021-11-21 01:25:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:08,191 INFO L225 Difference]: With dead ends: 116 [2021-11-21 01:25:08,191 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 01:25:08,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:25:08,193 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:08,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 01:25:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-21 01:25:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 72 states have internal predecessors, (76), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 01:25:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2021-11-21 01:25:08,211 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 68 [2021-11-21 01:25:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:08,212 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2021-11-21 01:25:08,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:25:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2021-11-21 01:25:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:25:08,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:08,213 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:08,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:08,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:08,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -119170930, now seen corresponding path program 1 times [2021-11-21 01:25:08,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:08,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529677683] [2021-11-21 01:25:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:08,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:25:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795446270] [2021-11-21 01:25:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:08,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:08,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:08,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:25:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:25:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-21 01:25:08,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-21 01:25:09,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:09,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529677683] [2021-11-21 01:25:09,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:25:09,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795446270] [2021-11-21 01:25:09,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795446270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:09,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831090025] [2021-11-21 01:25:09,347 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 01:25:09,347 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:09,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:09,348 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:09,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:26,315 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2021-11-21 01:25:26,378 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2021-11-21 01:25:26,390 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:27,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:25:27,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:25:27,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-21 01:25:27,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28202619] [2021-11-21 01:25:27,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:27,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:25:27,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:25:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:25:27,227 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2021-11-21 01:25:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:27,731 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2021-11-21 01:25:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:25:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 75 [2021-11-21 01:25:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:27,732 INFO L225 Difference]: With dead ends: 148 [2021-11-21 01:25:27,732 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 01:25:27,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:25:27,734 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:27,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 266 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:25:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 01:25:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 01:25:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 01:25:27,736 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-11-21 01:25:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:27,736 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 01:25:27,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2021-11-21 01:25:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 01:25:27,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 01:25:27,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:25:27,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:25:27,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:25:27,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 01:25:31,017 INFO L854 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5)) [2021-11-21 01:25:31,017 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-11-21 01:25:31,017 INFO L854 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,017 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-11-21 01:25:31,017 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,018 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,018 INFO L858 garLoopResultBuilder]: For program point L40(lines 38 62) no Hoare annotation was computed. [2021-11-21 01:25:31,018 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 01:25:31,018 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,018 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 01:25:31,019 INFO L854 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (<= 0 (+ |ULTIMATE.start_main_~y~0#1| 2147483648)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,019 INFO L854 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,019 INFO L858 garLoopResultBuilder]: For program point L50(lines 47 59) no Hoare annotation was computed. [2021-11-21 01:25:31,019 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,020 INFO L854 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~y~0#1| 5))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0)) (let ((.cse2 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse2 0) 48) (= (select .cse2 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2021-11-21 01:25:31,020 INFO L854 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse1 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= (* 2 .cse0) |ULTIMATE.start_main_~r~0#1|) (= 2 (select |#length| 1)) (= .cse0 |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse1 0) 48) (= (select .cse1 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,020 INFO L858 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2021-11-21 01:25:31,020 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,020 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2021-11-21 01:25:31,021 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,021 INFO L854 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (<= |ULTIMATE.start_main_~x~0#1| 5) (= (select |#length| 3) 12) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 5) (= 2 (select |#length| 1)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-21 01:25:31,021 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-11-21 01:25:31,021 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-11-21 01:25:31,022 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-21 01:25:31,022 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-21 01:25:31,022 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-11-21 01:25:31,022 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-11-21 01:25:31,022 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-11-21 01:25:31,022 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-21 01:25:31,026 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:31,027 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:25:31,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:25:31 BoogieIcfgContainer [2021-11-21 01:25:31,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:25:31,046 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:25:31,046 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:25:31,046 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:25:31,046 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:24:35" (3/4) ... [2021-11-21 01:25:31,049 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 01:25:31,055 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-21 01:25:31,055 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-21 01:25:31,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-21 01:25:31,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-21 01:25:31,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-21 01:25:31,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 01:25:31,103 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:25:31,103 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:25:31,104 INFO L158 Benchmark]: Toolchain (without parser) took 56375.07ms. Allocated memory was 88.1MB in the beginning and 310.4MB in the end (delta: 222.3MB). Free memory was 54.2MB in the beginning and 256.1MB in the end (delta: -201.9MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. [2021-11-21 01:25:31,104 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 88.1MB. Free memory was 62.3MB in the beginning and 62.2MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:25:31,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.67ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 53.9MB in the beginning and 98.1MB in the end (delta: -44.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:25:31,105 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.18ms. Allocated memory is still 121.6MB. Free memory was 98.1MB in the beginning and 96.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:25:31,106 INFO L158 Benchmark]: Boogie Preprocessor took 20.79ms. Allocated memory is still 121.6MB. Free memory was 96.7MB in the beginning and 95.3MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:25:31,106 INFO L158 Benchmark]: RCFGBuilder took 286.46ms. Allocated memory is still 121.6MB. Free memory was 95.3MB in the beginning and 84.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:25:31,106 INFO L158 Benchmark]: TraceAbstraction took 55684.94ms. Allocated memory was 121.6MB in the beginning and 310.4MB in the end (delta: 188.7MB). Free memory was 84.1MB in the beginning and 259.2MB in the end (delta: -175.1MB). Peak memory consumption was 173.1MB. Max. memory is 16.1GB. [2021-11-21 01:25:31,107 INFO L158 Benchmark]: Witness Printer took 57.77ms. Allocated memory is still 310.4MB. Free memory was 259.2MB in the beginning and 256.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:25:31,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 88.1MB. Free memory was 62.3MB in the beginning and 62.2MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.67ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 53.9MB in the beginning and 98.1MB in the end (delta: -44.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.18ms. Allocated memory is still 121.6MB. Free memory was 98.1MB in the beginning and 96.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.79ms. Allocated memory is still 121.6MB. Free memory was 96.7MB in the beginning and 95.3MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 286.46ms. Allocated memory is still 121.6MB. Free memory was 95.3MB in the beginning and 84.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 55684.94ms. Allocated memory was 121.6MB in the beginning and 310.4MB in the end (delta: 188.7MB). Free memory was 84.1MB in the beginning and 259.2MB in the end (delta: -175.1MB). Peak memory consumption was 173.1MB. Max. memory is 16.1GB. * Witness Printer took 57.77ms. Allocated memory is still 310.4MB. Free memory was 259.2MB in the beginning and 256.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 55.6s, OverallIterations: 9, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 293 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 239 mSDsluCounter, 1085 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 890 mSDsCounter, 252 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1246 IncrementalHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 252 mSolverCounterUnsat, 251 mSDtfsCounter, 1246 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 930 GetRequests, 772 SyntacticMatches, 25 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=8, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 65 PreInvPairs, 122 NumberOfFragments, 1003 HoareAnnotationTreeSize, 65 FomulaSimplifications, 225 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 7605 FormulaSimplificationTreeSizeReductionInter, 3.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 399 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 677 ConstructedInterpolants, 0 QuantifiedInterpolants, 2013 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1075 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 1227/1276 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: OVERALL_TIME: 14.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 74, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 43, TOOLS_POST_TIME: 2.2s, TOOLS_POST_CALL_APPLICATIONS: 69, TOOLS_POST_CALL_TIME: 6.9s, TOOLS_POST_RETURN_APPLICATIONS: 52, TOOLS_POST_RETURN_TIME: 4.7s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 164, TOOLS_QUANTIFIERELIM_TIME: 13.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.5s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 177, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 78, DOMAIN_JOIN_TIME: 0.4s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 74, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 5.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 5.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 52, CALL_SUMMARIZER_CACHE_MISSES: 4, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 888, DAG_COMPRESSION_RETAINED_NODES: 166, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: 1 <= y && y <= 5 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((((((((x <= 5 && unknown-#length-unknown[3] == 12) && 0 <= x) && y * q + r == x) && 1 <= y) && y <= 5) && 2 == unknown-#length-unknown[1]) && y * a == b) && \valid[3] == 1) && \valid[1] == 1) && 1 <= r) && \valid[0] == 0) && 14 == unknown-#length-unknown[2]) && \valid[2] == 1) && #NULL == 0) && unknown-#memory_int-unknown[1][0] == 48) && unknown-#memory_int-unknown[1][1] == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((((((((((((x <= 5 && unknown-#length-unknown[3] == 12) && 0 <= x) && y * q + r == x) && 1 <= y) && y <= 5) && 2 == unknown-#length-unknown[1]) && y * a == b) && \valid[3] == 1) && \valid[1] == 1) && \valid[0] == 0) && 14 == unknown-#length-unknown[2]) && \valid[2] == 1) && #NULL == 0) && unknown-#memory_int-unknown[1][0] == 48) && unknown-#memory_int-unknown[1][1] == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 RESULT: Ultimate proved your program to be correct! [2021-11-21 01:25:31,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebea807c-3892-4b0a-a3e1-13012dd965dd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE