./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:31,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:31,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:31,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:31,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:31,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:31,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:31,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:31,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:31,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:31,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:31,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:31,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:31,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:31,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:31,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:31,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:31,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:31,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:31,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:31,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:31,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:31,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:31,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:31,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:31,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:31,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:31,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:31,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:31,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:31,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:31,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:31,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:31,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:31,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:31,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:31,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:31,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:31,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:31,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:31,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:31,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:23:32,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:32,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:32,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:32,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:32,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:32,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:32,052 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:32,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:23:32,053 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:32,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:32,054 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:23:32,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:23:32,055 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:32,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:23:32,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:23:32,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:23:32,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:32,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:32,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:23:32,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:32,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:32,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:32,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:32,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:32,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:32,058 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:32,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:32,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:32,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:32,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:32,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:32,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:32,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:32,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:32,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:32,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:23:32,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:23:32,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:32,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:32,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:32,063 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_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 [2021-11-12 23:23:32,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:32,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:32,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:32,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:32,383 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:32,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-12 23:23:32,466 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/59d4e72e1/83d03cff4dbf4936a65c8e0b70c4c9fb/FLAGda7f1ce7f [2021-11-12 23:23:32,976 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:32,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-12 23:23:32,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/59d4e72e1/83d03cff4dbf4936a65c8e0b70c4c9fb/FLAGda7f1ce7f [2021-11-12 23:23:33,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/59d4e72e1/83d03cff4dbf4936a65c8e0b70c4c9fb [2021-11-12 23:23:33,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:33,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:33,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:33,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:33,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:33,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795b8a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33, skipping insertion in model container [2021-11-12 23:23:33,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:33,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:33,564 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-12 23:23:33,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:33,578 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:23:33,594 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-12 23:23:33,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:33,609 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:23:33,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33 WrapperNode [2021-11-12 23:23:33,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:33,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:33,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:23:33,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:23:33,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:33,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:23:33,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:23:33,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:23:33,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:23:33,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:23:33,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:23:33,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:23:33,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (1/1) ... [2021-11-12 23:23:33,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:33,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:33,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:23:33,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:23:33,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:23:33,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:23:33,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:23:33,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:23:33,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:23:33,950 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:23:33,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:33 BoogieIcfgContainer [2021-11-12 23:23:33,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:23:33,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:23:33,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:23:33,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:23:33,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:23:33" (1/3) ... [2021-11-12 23:23:33,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecb942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:33, skipping insertion in model container [2021-11-12 23:23:33,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:33" (2/3) ... [2021-11-12 23:23:33,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecb942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:33, skipping insertion in model container [2021-11-12 23:23:33,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:33" (3/3) ... [2021-11-12 23:23:33,965 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2021-11-12 23:23:33,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:23:33,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:23:34,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:23:34,024 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:23:34,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:23:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:23:34,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:34,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:34,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1205285734, now seen corresponding path program 1 times [2021-11-12 23:23:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:34,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793052913] [2021-11-12 23:23:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:34,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:34,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:34,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793052913] [2021-11-12 23:23:34,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793052913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:34,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:34,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:23:34,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038752102] [2021-11-12 23:23:34,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:23:34,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:23:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:23:34,252 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-12 23:23:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:34,282 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-11-12 23:23:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:23:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-12 23:23:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:34,292 INFO L225 Difference]: With dead ends: 21 [2021-11-12 23:23:34,293 INFO L226 Difference]: Without dead ends: 10 [2021-11-12 23:23:34,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:23:34,341 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:34,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 11.60ms Time] [2021-11-12 23:23:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-12 23:23:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-12 23:23:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2021-11-12 23:23:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-12 23:23:34,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-12 23:23:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:34,390 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-12 23:23:34,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-12 23:23:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-12 23:23:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:23:34,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:34,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:34,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:23:34,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1140391532, now seen corresponding path program 1 times [2021-11-12 23:23:34,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:34,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77321976] [2021-11-12 23:23:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:34,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:34,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:34,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77321976] [2021-11-12 23:23:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77321976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:34,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495222684] [2021-11-12 23:23:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:34,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:34,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:34,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:34,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:23:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:34,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:34,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495222684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:34,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605862563] [2021-11-12 23:23:34,753 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:34,753 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:34,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:34,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:34,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:34,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:34,808 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:34,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:34,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:34,814 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:34,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:34,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:34,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:34,860 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 23:23:34,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:34,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:34,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:34,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:34,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:34,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:34,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:34,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:34,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:34,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:34,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:35,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:35,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:35,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:35,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:35,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:35,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:35,117 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:35,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:23:35,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,275 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,306 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:35,334 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:35,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:35,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:35,523 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:35,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:35,542 INFO L180 QuantifierPusher]: treesize reduction 40, result has 47.4 percent of original size [2021-11-12 23:23:35,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:35,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:35,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-12 23:23:35,562 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:35,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [605862563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:35,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:35,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 10 [2021-11-12 23:23:35,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191754681] [2021-11-12 23:23:35,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:35,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:35,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:35,842 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-11-12 23:23:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:35,868 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-12 23:23:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:35,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2021-11-12 23:23:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:35,869 INFO L225 Difference]: With dead ends: 14 [2021-11-12 23:23:35,870 INFO L226 Difference]: Without dead ends: 10 [2021-11-12 23:23:35,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:35,872 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:35,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 18.46ms Time] [2021-11-12 23:23:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-12 23:23:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-12 23:23:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-11-12 23:23:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-12 23:23:35,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-12 23:23:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:35,878 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-12 23:23:35,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-11-12 23:23:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-12 23:23:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:23:35,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:35,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:35,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:36,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:36,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1157402193, now seen corresponding path program 1 times [2021-11-12 23:23:36,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:36,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343283537] [2021-11-12 23:23:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:36,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:36,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:36,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343283537] [2021-11-12 23:23:36,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343283537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:36,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382104852] [2021-11-12 23:23:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:36,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:36,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:36,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:23:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:36,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:36,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382104852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:36,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830506876] [2021-11-12 23:23:36,273 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:36,277 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:36,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:36,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:36,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:36,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,289 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:36,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:36,292 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:36,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:36,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:36,306 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 23:23:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:36,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:36,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:36,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:36,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:36,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:36,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:36,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:36,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:36,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:36,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:36,395 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:36,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:23:36,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,463 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:36,469 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:36,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:36,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:36,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:36,563 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:36,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:36,579 INFO L180 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-11-12 23:23:36,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:36,587 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:36,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:36,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:36,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 23:23:36,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459441800] [2021-11-12 23:23:36,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:36,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:36,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:36,844 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:36,865 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-12 23:23:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:23:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:36,867 INFO L225 Difference]: With dead ends: 20 [2021-11-12 23:23:36,867 INFO L226 Difference]: Without dead ends: 13 [2021-11-12 23:23:36,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:36,868 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:36,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 15.44ms Time] [2021-11-12 23:23:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-12 23:23:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-12 23:23:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-12 23:23:36,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-11-12 23:23:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:36,875 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-12 23:23:36,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-12 23:23:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:23:36,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:36,876 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:36,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:37,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-12 23:23:37,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash 678974667, now seen corresponding path program 2 times [2021-11-12 23:23:37,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:37,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919696945] [2021-11-12 23:23:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:37,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:37,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:37,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919696945] [2021-11-12 23:23:37,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919696945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:37,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366680185] [2021-11-12 23:23:37,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:37,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:37,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:37,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:23:37,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:23:37,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:37,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:23:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:37,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366680185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:37,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037039181] [2021-11-12 23:23:37,330 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:37,345 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:37,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:37,346 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:37,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:37,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,353 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:37,354 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:37,355 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:37,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:37,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:37,362 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-12 23:23:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:37,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:37,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:37,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:37,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:37,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:37,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:37,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:37,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:37,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:37,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:37,437 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:37,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:37,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,511 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:37,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:37,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:37,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:37,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:37,596 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:37,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:37,606 INFO L180 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-11-12 23:23:37,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:37,614 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:37,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:37,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:37,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-12 23:23:37,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170499145] [2021-11-12 23:23:37,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:37,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:37,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:37,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:23:37,866 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) [2021-11-12 23:23:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:37,893 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-12 23:23:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:23:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) Word has length 11 [2021-11-12 23:23:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:37,895 INFO L225 Difference]: With dead ends: 26 [2021-11-12 23:23:37,895 INFO L226 Difference]: Without dead ends: 19 [2021-11-12 23:23:37,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:23:37,897 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:37,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 23 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 18.26ms Time] [2021-11-12 23:23:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-12 23:23:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-12 23:23:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2021-11-12 23:23:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-12 23:23:37,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-11-12 23:23:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-12 23:23:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) [2021-11-12 23:23:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-12 23:23:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 23:23:37,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:37,905 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:37,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:38,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-12 23:23:38,130 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash 203278091, now seen corresponding path program 3 times [2021-11-12 23:23:38,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:38,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792687406] [2021-11-12 23:23:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:38,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:38,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:38,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792687406] [2021-11-12 23:23:38,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792687406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:38,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821736854] [2021-11-12 23:23:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:38,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:38,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:38,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:23:38,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:38,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:23:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:38,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:38,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821736854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:38,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722721591] [2021-11-12 23:23:38,624 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:38,624 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:38,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:38,626 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:38,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:38,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,639 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:38,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:38,642 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:38,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:38,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:38,650 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-12 23:23:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:38,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:38,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:38,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:38,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:38,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:38,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:38,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:38,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:38,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:38,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:38,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:38,721 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:38,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:38,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,792 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:38,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:38,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:38,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:38,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:38,877 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:38,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:38,885 INFO L180 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-11-12 23:23:38,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:38,891 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:39,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:39,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:39,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-12 23:23:39,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332581470] [2021-11-12 23:23:39,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:39,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:23:39,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:23:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:23:39,144 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-11-12 23:23:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:39,200 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-11-12 23:23:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:23:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 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 17 [2021-11-12 23:23:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:39,201 INFO L225 Difference]: With dead ends: 38 [2021-11-12 23:23:39,202 INFO L226 Difference]: Without dead ends: 31 [2021-11-12 23:23:39,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:23:39,203 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:39,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 44 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [16 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 38.21ms Time] [2021-11-12 23:23:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-12 23:23:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-12 23:23:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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) [2021-11-12 23:23:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-12 23:23:39,212 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 17 [2021-11-12 23:23:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:39,213 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-12 23:23:39,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-11-12 23:23:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-12 23:23:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 23:23:39,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:39,214 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:39,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:39,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-12 23:23:39,433 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 767597451, now seen corresponding path program 4 times [2021-11-12 23:23:39,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:39,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112870682] [2021-11-12 23:23:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:39,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:39,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112870682] [2021-11-12 23:23:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112870682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:39,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106832105] [2021-11-12 23:23:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:23:39,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:39,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:39,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:23:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:23:39,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:39,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:40,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106832105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:40,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228539095] [2021-11-12 23:23:40,811 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:40,812 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:40,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:40,812 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:40,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:40,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,820 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:40,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:40,826 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:40,827 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:40,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:40,833 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-12 23:23:40,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:40,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:40,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:40,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:40,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:40,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:40,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:40,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:40,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:40,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:40,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:40,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:40,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:40,893 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:40,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:23:40,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:40,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:40,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:40,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,944 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:40,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:40,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:40,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:40,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:41,016 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:41,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:41,024 INFO L180 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-11-12 23:23:41,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:41,029 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:41,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:41,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:41,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-12 23:23:41,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190740388] [2021-11-12 23:23:41,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-12 23:23:41,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-12 23:23:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 23:23:41,339 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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) [2021-11-12 23:23:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:41,439 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-11-12 23:23:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:23:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 29 [2021-11-12 23:23:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:41,449 INFO L225 Difference]: With dead ends: 62 [2021-11-12 23:23:41,449 INFO L226 Difference]: Without dead ends: 55 [2021-11-12 23:23:41,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 23:23:41,453 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:41,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 81 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [27 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 64.16ms Time] [2021-11-12 23:23:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-12 23:23:41,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-12 23:23:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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) [2021-11-12 23:23:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-12 23:23:41,480 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 29 [2021-11-12 23:23:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:41,480 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-12 23:23:41,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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) [2021-11-12 23:23:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-12 23:23:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:23:41,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:41,485 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:41,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:41,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-12 23:23:41,701 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1563032437, now seen corresponding path program 5 times [2021-11-12 23:23:41,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:41,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060790914] [2021-11-12 23:23:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:41,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:42,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:42,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060790914] [2021-11-12 23:23:42,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060790914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:42,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143357665] [2021-11-12 23:23:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:42,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:42,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:42,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:42,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:23:42,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-12 23:23:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 23:23:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:43,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:45,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143357665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:45,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235784685] [2021-11-12 23:23:45,826 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:45,826 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:45,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:45,827 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:45,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:45,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,834 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:45,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:45,835 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:45,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:45,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:45,850 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-12 23:23:45,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:45,861 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:45,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:45,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:45,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:45,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:45,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:45,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:45,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:45,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:45,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:45,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:45,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:45,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:45,923 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:45,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:23:45,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:45,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:45,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:45,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,972 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:45,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:45,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:46,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:46,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:46,058 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:46,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:46,065 INFO L180 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-11-12 23:23:46,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:46,070 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:46,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:46,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:46,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-12 23:23:46,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075560746] [2021-11-12 23:23:46,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:46,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-12 23:23:46,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-12 23:23:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2021-11-12 23:23:46,418 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 96 states have internal predecessors, (103), 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) [2021-11-12 23:23:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:46,704 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2021-11-12 23:23:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:23:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 96 states have internal predecessors, (103), 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 53 [2021-11-12 23:23:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:46,708 INFO L225 Difference]: With dead ends: 110 [2021-11-12 23:23:46,709 INFO L226 Difference]: Without dead ends: 103 [2021-11-12 23:23:46,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2021-11-12 23:23:46,713 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:46,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 157 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [53 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 106.60ms Time] [2021-11-12 23:23:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-12 23:23:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-12 23:23:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 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) [2021-11-12 23:23:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-12 23:23:46,755 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 53 [2021-11-12 23:23:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:46,756 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-12 23:23:46,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 96 states have internal predecessors, (103), 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) [2021-11-12 23:23:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-12 23:23:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:23:46,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:46,759 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:46,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:46,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:46,982 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1077946741, now seen corresponding path program 6 times [2021-11-12 23:23:46,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:46,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036503307] [2021-11-12 23:23:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:46,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:50,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:50,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036503307] [2021-11-12 23:23:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036503307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:50,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716207797] [2021-11-12 23:23:50,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:50,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:50,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:23:50,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:50,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-12 23:23:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:50,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716207797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:51,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781575463] [2021-11-12 23:23:51,439 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-12 23:23:51,439 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:51,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:51,440 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:51,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:51,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,445 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:51,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:23:51,447 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:51,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:23:51,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-12 23:23:51,452 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-12 23:23:51,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:23:51,462 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:51,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,464 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:51,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:51,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:51,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:23:51,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:51,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:23:51,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:51,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:51,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:51,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:103 [2021-11-12 23:23:51,499 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-12 23:23:51,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:51,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:51,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:51,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-12 23:23:51,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 256 [2021-11-12 23:23:51,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:51,625 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-12 23:23:51,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:23:51,631 INFO L180 QuantifierPusher]: treesize reduction 40, result has 48.1 percent of original size [2021-11-12 23:23:51,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:51,637 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:52,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:52,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:52,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 102 [2021-11-12 23:23:52,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567622881] [2021-11-12 23:23:52,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:52,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-12 23:23:52,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-12 23:23:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5267, Invalid=6075, Unknown=0, NotChecked=0, Total=11342 [2021-11-12 23:23:52,142 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 102 states have internal predecessors, (110), 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) [2021-11-12 23:23:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:52,345 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-11-12 23:23:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-12 23:23:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 102 states have internal predecessors, (110), 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 101 [2021-11-12 23:23:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:52,347 INFO L225 Difference]: With dead ends: 116 [2021-11-12 23:23:52,348 INFO L226 Difference]: Without dead ends: 109 [2021-11-12 23:23:52,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5267, Invalid=6075, Unknown=0, NotChecked=0, Total=11342 [2021-11-12 23:23:52,352 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:52,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 111 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 99.24ms Time] [2021-11-12 23:23:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-12 23:23:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-12 23:23:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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) [2021-11-12 23:23:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-11-12 23:23:52,371 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 101 [2021-11-12 23:23:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:52,372 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-11-12 23:23:52,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 102 states have internal predecessors, (110), 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) [2021-11-12 23:23:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-11-12 23:23:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:23:52,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:52,374 INFO L514 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:52,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:52,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-12 23:23:52,578 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2102593333, now seen corresponding path program 7 times [2021-11-12 23:23:52,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:52,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793586795] [2021-11-12 23:23:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:52,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:23:52,638 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:23:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:23:52,760 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:23:52,762 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:23:52,764 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:23:52,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-12 23:23:52,769 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2021-11-12 23:23:52,773 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:23:52,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:23:52 BoogieIcfgContainer [2021-11-12 23:23:52,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:23:52,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:23:52,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:23:52,948 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:23:52,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:33" (3/4) ... [2021-11-12 23:23:52,952 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:23:52,952 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:23:52,953 INFO L158 Benchmark]: Toolchain (without parser) took 19559.04ms. Allocated memory was 107.0MB in the beginning and 172.0MB in the end (delta: 65.0MB). Free memory was 79.5MB in the beginning and 141.1MB in the end (delta: -61.6MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-12 23:23:52,953 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory was 54.6MB in the beginning and 54.5MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:52,953 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.68ms. Allocated memory is still 107.0MB. Free memory was 79.2MB in the beginning and 69.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:23:52,954 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.05ms. Allocated memory is still 107.0MB. Free memory was 69.5MB in the beginning and 68.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:23:52,954 INFO L158 Benchmark]: Boogie Preprocessor took 20.66ms. Allocated memory is still 107.0MB. Free memory was 68.2MB in the beginning and 67.2MB in the end (delta: 991.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:52,954 INFO L158 Benchmark]: RCFGBuilder took 285.38ms. Allocated memory is still 107.0MB. Free memory was 67.2MB in the beginning and 57.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:23:52,954 INFO L158 Benchmark]: TraceAbstraction took 18992.26ms. Allocated memory was 107.0MB in the beginning and 172.0MB in the end (delta: 65.0MB). Free memory was 57.2MB in the beginning and 142.1MB in the end (delta: -84.9MB). Peak memory consumption was 74.1MB. Max. memory is 16.1GB. [2021-11-12 23:23:52,955 INFO L158 Benchmark]: Witness Printer took 4.20ms. Allocated memory is still 172.0MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:52,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory was 54.6MB in the beginning and 54.5MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.68ms. Allocated memory is still 107.0MB. Free memory was 79.2MB in the beginning and 69.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.05ms. Allocated memory is still 107.0MB. Free memory was 69.5MB in the beginning and 68.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.66ms. Allocated memory is still 107.0MB. Free memory was 68.2MB in the beginning and 67.2MB in the end (delta: 991.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 285.38ms. Allocated memory is still 107.0MB. Free memory was 67.2MB in the beginning and 57.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 18992.26ms. Allocated memory was 107.0MB in the beginning and 172.0MB in the end (delta: 65.0MB). Free memory was 57.2MB in the beginning and 142.1MB in the end (delta: -84.9MB). Peak memory consumption was 74.1MB. Max. memory is 16.1GB. * Witness Printer took 4.20ms. Allocated memory is still 172.0MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 41]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 28, overapproximation of someBinaryArithmeticDOUBLEoperation at line 19. Possible FailurePath: [L1] int __return_main; [L9] double main__x0; [L10] double main__x1; [L11] double main__x2; [L12] int main__i; [L13] main__x0 = 5.5 [L14] main__x1 = 5.545454545454546 [L15] main__i = 0 VAL [__return_main=0, main__i=0, main__x0=11/2, main__x1=2772727272727273/500000000000000] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__x0=2772727272727273/500000000000000, main__x1=149, main__x2=149] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__x0=149, main__x1=139, main__x2=139] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__x0=139, main__x1=113, main__x2=113] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__x0=113, main__x1=111, main__x2=111] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__x0=111, main__x1=106, main__x2=106] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__x0=106, main__x1=164, main__x2=164] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__x0=164, main__x1=194, main__x2=194] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__x0=194, main__x1=176, main__x2=176] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__x0=176, main__x1=151, main__x2=151] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__x0=151, main__x1=114, main__x2=114] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=11, main__x0=114, main__x1=131, main__x2=131] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=12, main__x0=131, main__x1=141, main__x2=141] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=13, main__x0=141, main__x1=158, main__x2=158] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=14, main__x0=158, main__x1=178, main__x2=178] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=15, main__x0=178, main__x1=105, main__x2=105] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=16, main__x0=105, main__x1=154, main__x2=154] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=17, main__x0=154, main__x1=153, main__x2=153] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=18, main__x0=153, main__x1=134, main__x2=134] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=19, main__x0=134, main__x1=132, main__x2=132] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=20, main__x0=132, main__x1=152, main__x2=152] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=21, main__x0=152, main__x1=136, main__x2=136] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=22, main__x0=136, main__x1=120, main__x2=120] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=23, main__x0=120, main__x1=124, main__x2=124] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=24, main__x0=124, main__x1=192, main__x2=192] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=25, main__x0=192, main__x1=140, main__x2=140] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=26, main__x0=140, main__x1=115, main__x2=115] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=27, main__x0=115, main__x1=104, main__x2=104] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=28, main__x0=104, main__x1=107, main__x2=107] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=29, main__x0=107, main__x1=191, main__x2=191] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=30, main__x0=191, main__x1=172, main__x2=172] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=31, main__x0=172, main__x1=142, main__x2=142] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=32, main__x0=142, main__x1=183, main__x2=183] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=33, main__x0=183, main__x1=168, main__x2=168] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=34, main__x0=168, main__x1=165, main__x2=165] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=35, main__x0=165, main__x1=135, main__x2=135] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=36, main__x0=135, main__x1=116, main__x2=116] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=37, main__x0=116, main__x1=181, main__x2=181] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=38, main__x0=181, main__x1=188, main__x2=188] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=39, main__x0=188, main__x1=193, main__x2=193] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=40, main__x0=193, main__x1=156, main__x2=156] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=41, main__x0=156, main__x1=112, main__x2=112] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=42, main__x0=112, main__x1=175, main__x2=175] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=43, main__x0=175, main__x1=159, main__x2=159] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=44, main__x0=159, main__x1=144, main__x2=144] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=45, main__x0=144, main__x1=195, main__x2=195] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=46, main__x0=195, main__x1=102, main__x2=102] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=47, main__x0=102, main__x1=157, main__x2=157] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=48, main__x0=157, main__x1=185, main__x2=185] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=49, main__x0=185, main__x1=121, main__x2=121] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=50, main__x0=121, main__x1=184, main__x2=184] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=51, main__x0=184, main__x1=119, main__x2=119] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=52, main__x0=119, main__x1=126, main__x2=126] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=53, main__x0=126, main__x1=177, main__x2=177] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=54, main__x0=177, main__x1=117, main__x2=117] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=55, main__x0=117, main__x1=162, main__x2=162] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=56, main__x0=162, main__x1=187, main__x2=187] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=57, main__x0=187, main__x1=169, main__x2=169] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=58, main__x0=169, main__x1=147, main__x2=147] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=59, main__x0=147, main__x1=148, main__x2=148] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=60, main__x0=148, main__x1=150, main__x2=150] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=61, main__x0=150, main__x1=167, main__x2=167] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=62, main__x0=167, main__x1=170, main__x2=170] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=63, main__x0=170, main__x1=180, main__x2=180] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=64, main__x0=180, main__x1=123, main__x2=123] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=65, main__x0=123, main__x1=186, main__x2=186] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=66, main__x0=186, main__x1=108, main__x2=108] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=67, main__x0=108, main__x1=189, main__x2=189] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=68, main__x0=189, main__x1=122, main__x2=122] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=69, main__x0=122, main__x1=179, main__x2=179] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=70, main__x0=179, main__x1=103, main__x2=103] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=71, main__x0=103, main__x1=190, main__x2=190] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=72, main__x0=190, main__x1=196, main__x2=196] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=73, main__x0=196, main__x1=166, main__x2=166] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=74, main__x0=166, main__x1=138, main__x2=138] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=75, main__x0=138, main__x1=143, main__x2=143] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=76, main__x0=143, main__x1=145, main__x2=145] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=77, main__x0=145, main__x1=129, main__x2=129] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=78, main__x0=129, main__x1=197, main__x2=197] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=79, main__x0=197, main__x1=198, main__x2=198] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=80, main__x0=198, main__x1=182, main__x2=182] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=81, main__x0=182, main__x1=171, main__x2=171] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=82, main__x0=171, main__x1=163, main__x2=163] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=83, main__x0=163, main__x1=130, main__x2=130] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=84, main__x0=130, main__x1=160, main__x2=160] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=85, main__x0=160, main__x1=161, main__x2=161] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=86, main__x0=161, main__x1=174, main__x2=174] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=87, main__x0=174, main__x1=127, main__x2=127] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=88, main__x0=127, main__x1=110, main__x2=110] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=89, main__x0=110, main__x1=109, main__x2=109] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=90, main__x0=109, main__x1=118, main__x2=118] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=91, main__x0=118, main__x1=128, main__x2=128] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=92, main__x0=128, main__x1=173, main__x2=173] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=93, main__x0=173, main__x1=137, main__x2=137] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=94, main__x0=137, main__x1=101, main__x2=101] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=95, main__x0=101, main__x1=146, main__x2=146] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=96, main__x0=146, main__x1=200, main__x2=200] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=97, main__x0=200, main__x1=155, main__x2=155] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=98, main__x0=155, main__x1=125, main__x2=125] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=99, main__x0=125, main__x1=133, main__x2=133] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L17] COND FALSE !(main__i < 100) [L27] int main____CPAchecker_TMP_0; VAL [__return_main=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L28] COND FALSE !(main__x0 >= 99.0) VAL [__return_main=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L53] main____CPAchecker_TMP_0 = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L35] int __tmp_1; [L36] __tmp_1 = main____CPAchecker_TMP_0 [L37] int __VERIFIER_assert__cond; [L38] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L39] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L41] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.8s, OverallIterations: 9, TraceHistogramMax: 100, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10 SdHoareTripleChecker+Valid, 371.97ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 261 SdHoareTripleChecker+Invalid, 275.26ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 197 mSDsCounter, 112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 335 IncrementalHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 112 mSolverCounterUnsat, 65 mSDtfsCounter, 335 mSolverCounterSat, 12.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 861 GetRequests, 531 SyntacticMatches, 14 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=8, InterpolantAutomatonStates: 297, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 568 NumberOfCodeBlocks, 568 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 666 ConstructedInterpolants, 0 QuantifiedInterpolants, 1778 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1597 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 22 InterpolantComputations, 1 PerfectInterpolantSequences, 0/17598 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 809.50ms, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 7, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 491.51ms, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.00ms, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.00ms, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME: 485.19ms, TOOLS_QUANTIFIERELIM_MAX_TIME: 307.78ms, FLUID_QUERY_TIME: 3.93ms, FLUID_QUERIES: 23, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.00ms, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.00ms, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 247.46ms, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 16.59ms, DOMAIN_ISBOTTOM_APPLICATIONS: 7, DOMAIN_ISBOTTOM_TIME: 7.50ms, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 428.18ms, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 428.08ms, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.00ms, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.00ms, PROCEDURE_GRAPH_BUILDER_TIME: 1.96ms, PATH_EXPR_TIME: 2.31ms, REGEX_TO_DAG_TIME: 3.10ms, DAG_COMPRESSION_TIME: 7.58ms, DAG_COMPRESSION_PROCESSED_NODES: 51, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 23:23:53,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:55,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:55,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:55,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:55,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:55,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:55,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:55,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:55,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:55,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:55,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:55,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:55,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:55,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:55,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:55,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:55,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:55,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:55,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:55,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:55,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:55,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:55,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:55,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:55,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:55,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:55,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:55,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:55,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:55,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:55,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:55,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:55,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:55,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:55,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:55,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:55,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:55,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:55,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:55,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:55,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:55,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:23:55,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:55,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:55,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:55,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:55,746 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:55,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:55,747 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:55,747 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:55,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:55,747 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:55,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:55,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:55,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:55,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:55,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:55,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:55,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:55,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:55,752 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:23:55,752 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:23:55,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:55,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:55,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:55,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:55,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:55,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:23:55,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:55,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:55,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:55,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:55,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:55,755 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:23:55,755 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:55,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:55,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:55,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:55,756 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 [2021-11-12 23:23:56,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:56,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:56,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:56,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:56,163 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:56,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-12 23:23:56,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/09c7576c0/df241c66b1f742f8b741a379afe986a1/FLAGb33c75441 [2021-11-12 23:23:56,796 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:56,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-12 23:23:56,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/09c7576c0/df241c66b1f742f8b741a379afe986a1/FLAGb33c75441 [2021-11-12 23:23:57,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/data/09c7576c0/df241c66b1f742f8b741a379afe986a1 [2021-11-12 23:23:57,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:57,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:57,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:57,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:57,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:57,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3a2ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57, skipping insertion in model container [2021-11-12 23:23:57,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:57,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:57,380 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-12 23:23:57,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:57,398 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:23:57,420 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-12 23:23:57,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:57,437 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:23:57,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57 WrapperNode [2021-11-12 23:23:57,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:57,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:57,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:23:57,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:23:57,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:57,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:23:57,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:23:57,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:23:57,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:23:57,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:23:57,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:23:57,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:23:57,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (1/1) ... [2021-11-12 23:23:57,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:57,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:57,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:23:57,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:23:57,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:23:57,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:23:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:23:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:24:00,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:24:00,306 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:24:00,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:00 BoogieIcfgContainer [2021-11-12 23:24:00,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:24:00,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:24:00,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:24:00,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:24:00,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:23:57" (1/3) ... [2021-11-12 23:24:00,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3968a41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:00, skipping insertion in model container [2021-11-12 23:24:00,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:57" (2/3) ... [2021-11-12 23:24:00,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3968a41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:00, skipping insertion in model container [2021-11-12 23:24:00,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:00" (3/3) ... [2021-11-12 23:24:00,318 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2021-11-12 23:24:00,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:24:00,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:24:00,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:24:00,379 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:24:00,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:24:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-12 23:24:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:24:00,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:00,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:00,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 207177897, now seen corresponding path program 1 times [2021-11-12 23:24:00,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:00,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656004821] [2021-11-12 23:24:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:00,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:00,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:24:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:24:00,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:00,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:00,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:00,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656004821] [2021-11-12 23:24:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656004821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:00,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:00,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:24:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232150967] [2021-11-12 23:24:00,801 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:00,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:00,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:24:00,836 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-11-12 23:24:04,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:04,517 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-12 23:24:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:24:04,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 8 [2021-11-12 23:24:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:04,530 INFO L225 Difference]: With dead ends: 24 [2021-11-12 23:24:04,530 INFO L226 Difference]: Without dead ends: 11 [2021-11-12 23:24:04,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:24:04,544 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3328.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3660.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:04,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 3 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 3660.63ms Time] [2021-11-12 23:24:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-12 23:24:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-12 23:24:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-12 23:24:04,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-12 23:24:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:04,585 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-12 23:24:04,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-11-12 23:24:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-12 23:24:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:24:04,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:04,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:04,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:04,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:04,794 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash 263819657, now seen corresponding path program 1 times [2021-11-12 23:24:04,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:04,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812023306] [2021-11-12 23:24:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:04,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:04,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:04,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:04,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:24:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:06,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:07,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:07,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812023306] [2021-11-12 23:24:07,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812023306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:07,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143792442] [2021-11-12 23:24:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:07,047 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:07,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:07,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:24:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:24:07,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:24:07,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143792442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:07,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:24:07,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4, 4] total 10 [2021-11-12 23:24:07,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503674506] [2021-11-12 23:24:07,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:07,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:07,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:07,931 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-12 23:24:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:08,190 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-12 23:24:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 9 [2021-11-12 23:24:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:08,192 INFO L225 Difference]: With dead ends: 15 [2021-11-12 23:24:08,192 INFO L226 Difference]: Without dead ends: 11 [2021-11-12 23:24:08,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:08,195 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:08,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 15 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 144.63ms Time] [2021-11-12 23:24:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-12 23:24:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-12 23:24:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-11-12 23:24:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-12 23:24:08,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-12 23:24:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:08,203 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-12 23:24:08,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-12 23:24:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-12 23:24:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:24:08,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:08,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:08,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:08,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:08,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:08,607 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 280830318, now seen corresponding path program 1 times [2021-11-12 23:24:08,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:08,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670017301] [2021-11-12 23:24:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:08,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:08,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:08,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:08,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:24:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:10,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:10,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670017301] [2021-11-12 23:24:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670017301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:10,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829451333] [2021-11-12 23:24:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:10,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:10,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:10,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:24:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:12,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:13,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829451333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:13,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406660013] [2021-11-12 23:24:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:13,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:13,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:13,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:13,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:24:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:14,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:15,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406660013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:15,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:24:15,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-12 23:24:15,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367206787] [2021-11-12 23:24:15,080 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:24:15,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:15,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:15,082 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-12 23:24:18,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:20,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:20,588 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-12 23:24:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 9 [2021-11-12 23:24:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:20,590 INFO L225 Difference]: With dead ends: 20 [2021-11-12 23:24:20,590 INFO L226 Difference]: Without dead ends: 13 [2021-11-12 23:24:20,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:20,592 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5119.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5499.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:20,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 2 Unknown, 0 Unchecked, 5499.69ms Time] [2021-11-12 23:24:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-12 23:24:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-12 23:24:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-12 23:24:20,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-12 23:24:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:20,598 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-12 23:24:20,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-12 23:24:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-12 23:24:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:24:20,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:20,600 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:20,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:20,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 23:24:21,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:21,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 634881390, now seen corresponding path program 2 times [2021-11-12 23:24:21,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:21,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036229155] [2021-11-12 23:24:21,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:24:21,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:21,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:21,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:24:26,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:24:26,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:24:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:26,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:27,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:27,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036229155] [2021-11-12 23:24:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036229155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:27,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1039114510] [2021-11-12 23:24:27,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:24:27,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:27,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:27,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:27,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:24:34,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:24:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:24:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:34,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:34,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1039114510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:34,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242896106] [2021-11-12 23:24:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:24:34,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:34,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:34,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:24:39,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:24:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:24:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:40,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:40,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242896106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:40,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:24:40,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-12 23:24:40,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069723136] [2021-11-12 23:24:40,932 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:24:40,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:24:40,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:40,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:24:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:40,936 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2021-11-12 23:24:44,133 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:46,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:48,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:50,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:51,451 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-11-12 23:24:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:24:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 11 [2021-11-12 23:24:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:51,452 INFO L225 Difference]: With dead ends: 24 [2021-11-12 23:24:51,452 INFO L226 Difference]: Without dead ends: 17 [2021-11-12 23:24:51,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:51,454 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9251.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9272.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:51,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 18 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 4 Unknown, 0 Unchecked, 9272.67ms Time] [2021-11-12 23:24:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-12 23:24:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-12 23:24:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2021-11-12 23:24:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-12 23:24:51,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2021-11-12 23:24:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:51,462 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-12 23:24:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2021-11-12 23:24:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-12 23:24:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:24:51,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:51,463 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:51,673 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forcibly destroying the process [2021-11-12 23:24:51,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 137 [2021-11-12 23:24:51,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:52,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:24:52,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:52,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash -684634770, now seen corresponding path program 3 times [2021-11-12 23:24:52,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:52,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633008484] [2021-11-12 23:24:52,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:24:52,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:52,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:52,148 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:52,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:25:27,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:25:27,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:28,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:30,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:30,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633008484] [2021-11-12 23:25:30,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633008484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:30,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [401419609] [2021-11-12 23:25:30,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:30,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:30,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:30,643 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:30,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:27:16,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:27:16,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:16,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:19,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [401419609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:19,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265017379] [2021-11-12 23:27:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:19,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:19,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:19,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c21ba90-2533-4df1-8ece-9de6cef57e05/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process