./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested9.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3ca1fd1ad8fdbcd9efe7b99bc6e3715231417d253ce4ee9bba3d5969472333a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:50:17,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:50:17,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:50:18,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:50:18,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:50:18,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:50:18,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:50:18,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:50:18,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:50:18,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:50:18,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:50:18,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:50:18,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:50:18,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:50:18,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:50:18,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:50:18,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:50:18,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:50:18,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:50:18,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:50:18,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:50:18,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:50:18,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:50:18,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:50:18,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:50:18,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:50:18,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:50:18,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:50:18,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:50:18,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:50:18,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:50:18,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:50:18,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:50:18,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:50:18,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:50:18,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:50:18,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:50:18,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:50:18,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:50:18,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:50:18,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:50:18,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:50:18,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:50:18,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:50:18,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:50:18,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:50:18,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:50:18,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:50:18,112 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:50:18,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:50:18,113 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:50:18,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:50:18,114 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:50:18,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:50:18,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:50:18,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:50:18,115 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:50:18,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:50:18,116 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:50:18,116 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:50:18,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:50:18,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:50:18,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:50:18,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:50:18,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:50:18,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:50:18,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:50:18,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:50:18,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:50:18,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:50:18,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:50:18,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:50:18,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:50:18,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:50:18,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:18,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:50:18,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:50:18,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:50:18,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:50:18,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:50:18,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:50:18,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:50:18,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:50:18,124 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_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3ca1fd1ad8fdbcd9efe7b99bc6e3715231417d253ce4ee9bba3d5969472333a [2021-11-23 03:50:18,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:50:18,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:50:18,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:50:18,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:50:18,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:50:18,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/loop-invgen/nested9.i [2021-11-23 03:50:18,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/data/c4c3724f2/05d3a974c1b84ce0bd23d8a491f1880d/FLAGfc1aa8573 [2021-11-23 03:50:18,980 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:50:18,981 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/sv-benchmarks/c/loop-invgen/nested9.i [2021-11-23 03:50:19,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/data/c4c3724f2/05d3a974c1b84ce0bd23d8a491f1880d/FLAGfc1aa8573 [2021-11-23 03:50:19,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/data/c4c3724f2/05d3a974c1b84ce0bd23d8a491f1880d [2021-11-23 03:50:19,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:50:19,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:50:19,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:19,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:50:19,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:50:19,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fbf92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19, skipping insertion in model container [2021-11-23 03:50:19,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:50:19,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:50:19,593 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_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-11-23 03:50:19,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:19,616 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:50:19,630 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_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-11-23 03:50:19,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:19,649 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:50:19,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19 WrapperNode [2021-11-23 03:50:19,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:19,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:19,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:50:19,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:50:19,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,687 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-23 03:50:19,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:19,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:50:19,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:50:19,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:50:19,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:50:19,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:50:19,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:50:19,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:50:19,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (1/1) ... [2021-11-23 03:50:19,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:19,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:50:19,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:50:19,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:50:19,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:50:19,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:50:19,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:50:19,896 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:50:19,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:50:20,070 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:50:20,095 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:50:20,095 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:50:20,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:20 BoogieIcfgContainer [2021-11-23 03:50:20,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:50:20,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:50:20,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:50:20,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:50:20,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:50:19" (1/3) ... [2021-11-23 03:50:20,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d8cf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:20, skipping insertion in model container [2021-11-23 03:50:20,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:19" (2/3) ... [2021-11-23 03:50:20,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d8cf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:20, skipping insertion in model container [2021-11-23 03:50:20,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:20" (3/3) ... [2021-11-23 03:50:20,127 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2021-11-23 03:50:20,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:50:20,146 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:50:20,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:50:20,244 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:50:20,244 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:50:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:50:20,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:20,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:20,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash -130597284, now seen corresponding path program 1 times [2021-11-23 03:50:20,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:20,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28018155] [2021-11-23 03:50:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:20,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:20,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28018155] [2021-11-23 03:50:20,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28018155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:20,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:20,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:50:20,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567884514] [2021-11-23 03:50:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:20,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:20,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:20,571 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:20,767 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2021-11-23 03:50:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:50:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:50:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:20,779 INFO L225 Difference]: With dead ends: 48 [2021-11-23 03:50:20,779 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:50:20,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:50:20,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:20,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:50:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-23 03:50:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-23 03:50:20,837 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2021-11-23 03:50:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:20,838 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-23 03:50:20,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-23 03:50:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:50:20,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:20,841 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:50:20,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash 294637096, now seen corresponding path program 1 times [2021-11-23 03:50:20,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556689060] [2021-11-23 03:50:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:20,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:21,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:21,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556689060] [2021-11-23 03:50:21,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556689060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193931516] [2021-11-23 03:50:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:21,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:21,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:50:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:50:21,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:21,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:50:21,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193931516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:21,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:21,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-23 03:50:21,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249952875] [2021-11-23 03:50:21,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:21,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:50:21,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:50:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:21,361 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:21,472 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-23 03:50:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:50:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:50:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:21,474 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:50:21,474 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:50:21,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:50:21,476 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 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 [2021-11-23 03:50:21,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:50:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 14. [2021-11-23 03:50:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 03:50:21,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 12 [2021-11-23 03:50:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:21,484 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 03:50:21,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 03:50:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:50:21,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:21,486 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:21,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:21,713 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 622122465, now seen corresponding path program 1 times [2021-11-23 03:50:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:21,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169022864] [2021-11-23 03:50:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:21,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:21,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169022864] [2021-11-23 03:50:21,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169022864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819463146] [2021-11-23 03:50:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:21,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:21,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:21,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:50:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:21,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:50:21,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:50:21,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:50:21,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819463146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:21,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:21,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-23 03:50:21,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272809890] [2021-11-23 03:50:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:21,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:50:21,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:50:21,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:50:21,975 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:22,001 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-11-23 03:50:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:50:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:50:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:22,003 INFO L225 Difference]: With dead ends: 25 [2021-11-23 03:50:22,003 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:50:22,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:50:22,008 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:22,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:50:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:50:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-23 03:50:22,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2021-11-23 03:50:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:22,019 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-23 03:50:22,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-23 03:50:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:50:22,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:22,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:22,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:22,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:22,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:22,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1373986155, now seen corresponding path program 1 times [2021-11-23 03:50:22,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:22,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987970783] [2021-11-23 03:50:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:22,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:22,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:22,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987970783] [2021-11-23 03:50:22,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987970783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:22,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798436271] [2021-11-23 03:50:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:22,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:22,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:22,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:22,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:50:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:50:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:22,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:22,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798436271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84982963] [2021-11-23 03:50:22,607 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:50:22,607 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:22,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:22,617 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:22,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:23,135 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:24,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (<= 0 (+ 1000000 |ULTIMATE.start_main_~l~0#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~k~0#1| (+ (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~i~0#1|)) 1 0)) (<= |ULTIMATE.start_main_~l~0#1| 1000000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ 1000000 |ULTIMATE.start_main_~m~0#1|)) (<= |ULTIMATE.start_main_~m~0#1| 1000000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~__BLAST_NONDET~0 0) (<= |ULTIMATE.start_main_~j~0#1| 2) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (= |#NULL.base| 0))' at error location [2021-11-23 03:50:24,439 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:24,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:24,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-23 03:50:24,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120364199] [2021-11-23 03:50:24,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:24,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:50:24,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:50:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:50:24,442 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:24,570 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-11-23 03:50:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:50:24,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:50:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:24,572 INFO L225 Difference]: With dead ends: 34 [2021-11-23 03:50:24,572 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:50:24,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:50:24,574 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:24,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:50:24,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-23 03:50:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-23 03:50:24,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-23 03:50:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:24,582 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-23 03:50:24,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-23 03:50:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:50:24,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:24,584 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:24,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:24,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:24,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash -284048417, now seen corresponding path program 1 times [2021-11-23 03:50:24,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181583227] [2021-11-23 03:50:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:24,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:50:24,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181583227] [2021-11-23 03:50:24,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181583227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812846634] [2021-11-23 03:50:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:24,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:24,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:24,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:50:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:50:25,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:50:25,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812846634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:25,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:25,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-23 03:50:25,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251179080] [2021-11-23 03:50:25,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:25,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:25,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:50:25,057 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:25,107 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-11-23 03:50:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:50:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 03:50:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:25,109 INFO L225 Difference]: With dead ends: 38 [2021-11-23 03:50:25,109 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 03:50:25,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:25,111 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:25,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 03:50:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-23 03:50:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 03:50:25,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2021-11-23 03:50:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:25,128 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 03:50:25,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 03:50:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:50:25,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:25,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:25,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:25,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:25,353 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1219458350, now seen corresponding path program 2 times [2021-11-23 03:50:25,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:25,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046207692] [2021-11-23 03:50:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:25,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:50:25,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046207692] [2021-11-23 03:50:25,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046207692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220437839] [2021-11-23 03:50:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:50:25,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:25,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:25,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:50:25,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 03:50:25,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:50:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:50:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:50:25,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:50:25,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220437839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996845831] [2021-11-23 03:50:25,666 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:50:25,666 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:25,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:25,667 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:25,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:26,702 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:27,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862#(and (<= 0 (+ 1000000 |ULTIMATE.start_main_~l~0#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~k~0#1| (+ (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~i~0#1|)) 1 0)) (<= |ULTIMATE.start_main_~l~0#1| 1000000) (<= |ULTIMATE.start_main_~j~0#1| 3000000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ 1000000 |ULTIMATE.start_main_~m~0#1|)) (<= |ULTIMATE.start_main_~m~0#1| 1000000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~__BLAST_NONDET~0 0) (<= |ULTIMATE.start_main_~n~0#1| 1000000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 1000000) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (= |#NULL.base| 0))' at error location [2021-11-23 03:50:27,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:27,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:27,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2021-11-23 03:50:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984990960] [2021-11-23 03:50:27,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:27,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:50:27,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:50:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:50:27,302 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:27,450 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-23 03:50:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:50:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:50:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:27,451 INFO L225 Difference]: With dead ends: 39 [2021-11-23 03:50:27,451 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:50:27,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:50:27,452 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:27,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:50:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:50:27,453 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) [2021-11-23 03:50:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:50:27,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-11-23 03:50:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:27,454 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:50:27,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:50:27,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:50:27,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:50:27,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:27,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:27,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:50:28,018 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 |ULTIMATE.start_main_~i~0#1|))) (let ((.cse0 (<= .cse2 |ULTIMATE.start_main_~j~0#1|)) (.cse1 (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|))) (or (and .cse0 .cse1 (< |ULTIMATE.start_main_~j~0#1| (* 3 |ULTIMATE.start_main_~i~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 1)) (and (= |ULTIMATE.start_main_~i~0#1| 0) .cse0 (<= |ULTIMATE.start_main_~j~0#1| .cse2) .cse1) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) .cse0 (<= |ULTIMATE.start_main_~j~0#1| (+ (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse1)))) [2021-11-23 03:50:28,018 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-11-23 03:50:28,018 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-23 03:50:28,018 INFO L854 garLoopResultBuilder]: At program point L36-3(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|)) (.cse1 (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse2 (< |ULTIMATE.start_main_~j~0#1| (* 3 |ULTIMATE.start_main_~i~0#1|)))) (or (and .cse0 (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse1 .cse2) (and .cse0 (<= |ULTIMATE.start_main_~k~0#1| (div |ULTIMATE.start_main_~j~0#1| 2)) .cse1 .cse2 (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1)))) [2021-11-23 03:50:28,019 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-11-23 03:50:28,019 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:50:28,019 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-23 03:50:28,019 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-11-23 03:50:28,019 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:50:28,019 INFO L861 garLoopResultBuilder]: At program point L38(lines 25 40) the Hoare annotation is: true [2021-11-23 03:50:28,020 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|)) (.cse3 (* 2 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (<= 1 |ULTIMATE.start_main_~i~0#1|)) (.cse2 (<= .cse1 (+ 2 .cse3)))) (or (and .cse0 (<= |ULTIMATE.start_main_~j~0#1| .cse1) .cse2 (<= |ULTIMATE.start_main_~i~0#1| 1)) (= |ULTIMATE.start_main_~i~0#1| 0) (and .cse0 (<= |ULTIMATE.start_main_~j~0#1| (+ .cse3 |ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse2 (<= 2 |ULTIMATE.start_main_~n~0#1|))))) [2021-11-23 03:50:28,020 INFO L858 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2021-11-23 03:50:28,020 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-23 03:50:28,020 INFO L854 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (< |ULTIMATE.start_main_~j~0#1| (* 3 |ULTIMATE.start_main_~i~0#1|))) [2021-11-23 03:50:28,020 INFO L861 garLoopResultBuilder]: At program point L39(lines 25 40) the Hoare annotation is: true [2021-11-23 03:50:28,024 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-11-23 03:50:28,029 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:50:28,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:50:28 BoogieIcfgContainer [2021-11-23 03:50:28,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:50:28,067 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:50:28,067 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:50:28,067 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:50:28,068 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:20" (3/4) ... [2021-11-23 03:50:28,070 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:50:28,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-23 03:50:28,080 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-23 03:50:28,080 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 03:50:28,080 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:50:28,120 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:50:28,121 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:50:28,121 INFO L158 Benchmark]: Toolchain (without parser) took 8749.75ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 60.4MB in the beginning and 132.3MB in the end (delta: -71.9MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-11-23 03:50:28,122 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 49.3MB in the beginning and 49.2MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:50:28,122 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.07ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 60.2MB in the beginning and 91.8MB in the end (delta: -31.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:50:28,123 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.03ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 90.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:50:28,123 INFO L158 Benchmark]: Boogie Preprocessor took 37.31ms. Allocated memory is still 117.4MB. Free memory was 90.3MB in the beginning and 89.4MB in the end (delta: 911.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:50:28,124 INFO L158 Benchmark]: RCFGBuilder took 387.20ms. Allocated memory is still 117.4MB. Free memory was 89.4MB in the beginning and 78.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:50:28,124 INFO L158 Benchmark]: TraceAbstraction took 7951.50ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 78.5MB in the beginning and 134.4MB in the end (delta: -55.9MB). Peak memory consumption was 68.5MB. Max. memory is 16.1GB. [2021-11-23 03:50:28,125 INFO L158 Benchmark]: Witness Printer took 53.87ms. Allocated memory is still 172.0MB. Free memory was 134.4MB in the beginning and 132.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:50:28,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 49.3MB in the beginning and 49.2MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.07ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 60.2MB in the beginning and 91.8MB in the end (delta: -31.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.03ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 90.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.31ms. Allocated memory is still 117.4MB. Free memory was 90.3MB in the beginning and 89.4MB in the end (delta: 911.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 387.20ms. Allocated memory is still 117.4MB. Free memory was 89.4MB in the beginning and 78.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7951.50ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 78.5MB in the beginning and 134.4MB in the end (delta: -55.9MB). Peak memory consumption was 68.5MB. Max. memory is 16.1GB. * Witness Printer took 53.87ms. Allocated memory is still 172.0MB. Free memory was 134.4MB in the beginning and 132.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: 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 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 111 mSDsluCounter, 161 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 142 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 319 IncrementalHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 47 mSDtfsCounter, 319 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 176 HoareAnnotationTreeSize, 6 FomulaSimplifications, 109 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 1345 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 172 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 196 ConstructedInterpolants, 0 QuantifiedInterpolants, 668 SizeOfPredicates, 20 NumberOfNonLiveVariables, 314 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 73/103 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((2 * i <= j && 1 <= cond) && i < n) && j < 3 * i - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((2 * i <= j && 1 <= cond) && i < n) && j < 3 * i) || (((((2 * i <= j && k <= j / 2) && i < n) && j < 3 * i) && j * -1 / -2 <= k) && i <= 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && j < 3 * i) && i <= 1) || (((i == 0 && 2 * i <= j) && j <= 2 * i) && i < n)) || ((((1 <= i && 2 * i <= j) && j <= 2 * n + i + 1) && 1 <= cond) && i < n) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((1 <= i && j <= 2 * i) && 2 * i <= 2 + 2 * n) && i <= 1) || i == 0) || ((((1 <= i && j <= 2 * n + i + 1) && 1 <= cond) && 2 * i <= 2 + 2 * n) && 2 <= n) RESULT: Ultimate proved your program to be correct! [2021-11-23 03:50:28,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fbf7cb-b9e5-4a4c-8541-06bfa2ea3545/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE