./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested5-2.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_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/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_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/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_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/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 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:46,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:46,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:46,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:46,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:46,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:46,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:46,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:46,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:46,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:46,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:46,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:46,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:46,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:46,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:46,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:46,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:46,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:46,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:46,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:46,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:46,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:46,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:46,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:46,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:46,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:46,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:46,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:46,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:46,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:46,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:46,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:46,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:46,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:46,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:46,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:46,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:46,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:46,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:46,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:46,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:46,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:28:46,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:46,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:46,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:46,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:46,259 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:46,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:46,260 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:46,260 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:28:46,260 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:46,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:46,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:28:46,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:28:46,261 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:46,262 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:28:46,262 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:28:46,262 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:28:46,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:46,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:28:46,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:28:46,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:28:46,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:46,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:46,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:46,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:46,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:46,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:28:46,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:46,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:46,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:46,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:46,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:46,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:46,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:46,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:46,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:46,267 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:28:46,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:28:46,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:46,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:46,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:46,268 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_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 [2021-11-12 22:28:46,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:46,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:46,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:46,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:46,542 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:46,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2021-11-12 22:28:46,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/data/5a65df6ef/2d064dfecc704569b4289944d4089ad5/FLAG89e6dddbd [2021-11-12 22:28:47,073 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:47,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2021-11-12 22:28:47,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/data/5a65df6ef/2d064dfecc704569b4289944d4089ad5/FLAG89e6dddbd [2021-11-12 22:28:47,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/data/5a65df6ef/2d064dfecc704569b4289944d4089ad5 [2021-11-12 22:28:47,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:47,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:47,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:47,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:47,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:47,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30daa150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47, skipping insertion in model container [2021-11-12 22:28:47,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:47,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:47,671 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_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2021-11-12 22:28:47,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:47,705 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:28:47,724 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_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2021-11-12 22:28:47,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:47,758 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:28:47,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47 WrapperNode [2021-11-12 22:28:47,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:47,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:28:47,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:28:47,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:28:47,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:28:47,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:28:47,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:28:47,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:28:47,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:28:47,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:28:47,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:28:47,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:28:47,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (1/1) ... [2021-11-12 22:28:47,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:47,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:47,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:28:47,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:28:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:28:47,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:28:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:28:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:28:48,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:28:48,183 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-12 22:28:48,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:28:48 BoogieIcfgContainer [2021-11-12 22:28:48,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:28:48,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:28:48,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:28:48,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:28:48,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:28:47" (1/3) ... [2021-11-12 22:28:48,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae2857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:28:48, skipping insertion in model container [2021-11-12 22:28:48,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:47" (2/3) ... [2021-11-12 22:28:48,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae2857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:28:48, skipping insertion in model container [2021-11-12 22:28:48,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:28:48" (3/3) ... [2021-11-12 22:28:48,202 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2021-11-12 22:28:48,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:28:48,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:28:48,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:28:48,269 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 22:28:48,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:28:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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 22:28:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:28:48,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:48,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:48,289 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -614732004, now seen corresponding path program 1 times [2021-11-12 22:28:48,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:28:48,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293843853] [2021-11-12 22:28:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:48,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:28:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:48,542 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 22:28:48,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:28:48,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293843853] [2021-11-12 22:28:48,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293843853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:48,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:28:48,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:28:48,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086462577] [2021-11-12 22:28:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:48,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:28:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:28:48,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:28:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:28:48,591 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 22:28:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:48,640 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-11-12 22:28:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:28:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 22:28:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:48,651 INFO L225 Difference]: With dead ends: 27 [2021-11-12 22:28:48,651 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 22:28:48,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 22:28:48,658 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:48,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 16 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 28.28ms Time] [2021-11-12 22:28:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 22:28:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2021-11-12 22:28:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 22:28:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-11-12 22:28:48,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-11-12 22:28:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:48,691 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-11-12 22:28:48,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 22:28:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-11-12 22:28:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 22:28:48,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:48,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:48,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:28:48,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1877140079, now seen corresponding path program 1 times [2021-11-12 22:28:48,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:28:48,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49020893] [2021-11-12 22:28:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:28:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:48,829 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 22:28:48,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:28:48,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49020893] [2021-11-12 22:28:48,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49020893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:48,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193522201] [2021-11-12 22:28:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:48,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:28:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:48,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:28:48,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:28:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:28:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:48,993 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 22:28:48,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:49,053 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 22:28:49,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193522201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:49,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316845400] [2021-11-12 22:28:49,076 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 22:28:49,076 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:28:49,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:28:49,087 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:28:49,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:28:49,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,133 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:49,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:28:49,136 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:49,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:28:49,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:28:49,173 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 22:28:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 22:28:49,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,217 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:49,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:49,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:49,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:49,317 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:28:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:28:49,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:49,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:49,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:49,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:28:49,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:28:49,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:131, output treesize:110 [2021-11-12 22:28:49,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-12 22:28:49,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 22:28:49,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:28:49,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:28:49,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,465 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:28:49,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:49,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 342 [2021-11-12 22:28:49,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:49,818 INFO L180 QuantifierPusher]: treesize reduction 54, result has 50.0 percent of original size [2021-11-12 22:28:49,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 22:28:49,859 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:28:50,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:28:50,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:28:50,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-12 22:28:50,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646973368] [2021-11-12 22:28:50,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:28:50,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:28:50,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:28:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:28:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:28:50,475 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 22:28:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:50,536 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2021-11-12 22:28:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 22:28:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:50,538 INFO L225 Difference]: With dead ends: 28 [2021-11-12 22:28:50,539 INFO L226 Difference]: Without dead ends: 18 [2021-11-12 22:28:50,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:28:50,544 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:50,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 39.04ms Time] [2021-11-12 22:28:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-12 22:28:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-12 22:28:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 22:28:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-11-12 22:28:50,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2021-11-12 22:28:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:50,556 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-11-12 22:28:50,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 22:28:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-11-12 22:28:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 22:28:50,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:50,557 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:50,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:50,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-12 22:28:50,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1720818596, now seen corresponding path program 2 times [2021-11-12 22:28:50,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:28:50,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054778270] [2021-11-12 22:28:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:50,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:28:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:50,918 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 22:28:50,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:28:50,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054778270] [2021-11-12 22:28:50,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054778270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:50,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984160362] [2021-11-12 22:28:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:28:50,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:28:50,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:50,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:28:50,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:28:50,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:28:50,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:28:50,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:28:50,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:51,087 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 22:28:51,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:28:51,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984160362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:51,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116551708] [2021-11-12 22:28:51,208 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 22:28:51,208 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:28:51,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:28:51,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:28:51,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:28:51,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,218 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:51,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:28:51,220 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:51,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:28:51,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:28:51,238 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 22:28:51,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 22:28:51,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:51,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:51,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:51,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:51,319 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:28:51,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:28:51,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:51,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:51,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:51,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:28:51,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:28:51,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:131, output treesize:110 [2021-11-12 22:28:51,339 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-12 22:28:51,349 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 22:28:51,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:28:51,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:28:51,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:28:51,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:51,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 342 [2021-11-12 22:28:51,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:51,614 INFO L180 QuantifierPusher]: treesize reduction 54, result has 50.0 percent of original size [2021-11-12 22:28:51,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 22:28:51,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:28:52,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:28:52,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:28:52,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2021-11-12 22:28:52,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746476017] [2021-11-12 22:28:52,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:28:52,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:28:52,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:28:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:28:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:28:52,274 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:52,642 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2021-11-12 22:28:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:28:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-12 22:28:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:52,645 INFO L225 Difference]: With dead ends: 66 [2021-11-12 22:28:52,645 INFO L226 Difference]: Without dead ends: 53 [2021-11-12 22:28:52,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:28:52,647 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:52,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 192 Invalid, 342 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [18 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 233.26ms Time] [2021-11-12 22:28:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-12 22:28:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 19. [2021-11-12 22:28:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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 22:28:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2021-11-12 22:28:52,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 12 [2021-11-12 22:28:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:52,655 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-11-12 22:28:52,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2021-11-12 22:28:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:28:52,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:52,657 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:52,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:52,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:28:52,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1806086063, now seen corresponding path program 3 times [2021-11-12 22:28:52,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:28:52,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741716790] [2021-11-12 22:28:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:52,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:28:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:53,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:28:53,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741716790] [2021-11-12 22:28:53,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741716790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802123354] [2021-11-12 22:28:53,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:28:53,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:28:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:53,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:28:53,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:28:53,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:28:53,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:28:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:28:53,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:53,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:53,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802123354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:53,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21339155] [2021-11-12 22:28:53,269 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 22:28:53,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:28:53,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:28:53,269 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:28:53,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:28:53,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,279 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:53,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:28:53,284 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:53,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:28:53,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:28:53,291 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-12 22:28:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 22:28:53,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:53,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:53,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:53,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:53,343 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:28:53,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:28:53,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:53,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:53,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:53,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,361 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:28:53,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:28:53,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:131, output treesize:110 [2021-11-12 22:28:53,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-12 22:28:53,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 22:28:53,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:28:53,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:28:53,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-12 22:28:53,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,474 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:53,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 349 [2021-11-12 22:28:53,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:53,563 INFO L180 QuantifierPusher]: treesize reduction 54, result has 50.0 percent of original size [2021-11-12 22:28:53,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 22:28:53,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:28:54,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:28:54,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:28:54,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-12 22:28:54,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657196746] [2021-11-12 22:28:54,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:28:54,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:28:54,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:28:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:28:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:28:54,208 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:54,740 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2021-11-12 22:28:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:28:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 22:28:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:54,741 INFO L225 Difference]: With dead ends: 48 [2021-11-12 22:28:54,741 INFO L226 Difference]: Without dead ends: 30 [2021-11-12 22:28:54,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:28:54,743 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:54,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 118 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [15 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 113.86ms Time] [2021-11-12 22:28:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-12 22:28:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-12 22:28:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-12 22:28:54,749 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 13 [2021-11-12 22:28:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:54,749 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-12 22:28:54,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-12 22:28:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:28:54,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:54,751 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:54,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:54,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-12 22:28:54,964 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2130417105, now seen corresponding path program 4 times [2021-11-12 22:28:54,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:28:54,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896601017] [2021-11-12 22:28:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:54,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:28:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:55,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:28:55,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896601017] [2021-11-12 22:28:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896601017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:55,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570607223] [2021-11-12 22:28:55,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:28:55,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:28:55,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:55,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:28:55,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 22:28:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:28:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:55,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:55,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570607223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:55,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762140711] [2021-11-12 22:28:55,863 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 22:28:55,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:28:55,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:28:55,863 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:28:55,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:28:55,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,874 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:55,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:28:55,879 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:28:55,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:28:55,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:28:55,887 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-12 22:28:55,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 22:28:55,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:55,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:28:55,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:55,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:55,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,932 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:28:55,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:28:55,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:55,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:28:55,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:28:55,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:55,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,943 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:28:55,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:28:55,945 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:131, output treesize:110 [2021-11-12 22:28:55,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-12 22:28:55,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 22:28:55,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:28:55,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:28:55,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:55,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-12 22:28:55,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,055 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:28:56,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 349 [2021-11-12 22:28:56,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:28:56,138 INFO L180 QuantifierPusher]: treesize reduction 54, result has 50.0 percent of original size [2021-11-12 22:28:56,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 22:28:56,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:28:56,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:28:56,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:28:56,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-12 22:28:56,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084696317] [2021-11-12 22:28:56,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:28:56,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-12 22:28:56,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:28:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-12 22:28:56,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:28:56,955 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:13,767 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-11-12 22:29:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 22:29:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-12 22:29:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:13,769 INFO L225 Difference]: With dead ends: 71 [2021-11-12 22:29:13,769 INFO L226 Difference]: Without dead ends: 46 [2021-11-12 22:29:13,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=727, Invalid=1529, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 22:29:13,771 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 419.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:13,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 133 Invalid, 390 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [46 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 419.51ms Time] [2021-11-12 22:29:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-12 22:29:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-11-12 22:29:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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 22:29:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-12 22:29:13,807 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-11-12 22:29:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:13,807 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-12 22:29:13,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-12 22:29:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 22:29:13,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:13,808 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:13,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-12 22:29:14,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:14,009 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1071144751, now seen corresponding path program 5 times [2021-11-12 22:29:14,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:14,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099998178] [2021-11-12 22:29:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:14,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:14,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:14,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099998178] [2021-11-12 22:29:14,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099998178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:14,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009449656] [2021-11-12 22:29:14,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:14,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:14,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:14,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:14,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25edaaeb-a02c-4891-849a-d5d8e8b8d5de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:29:15,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-12 22:29:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-12 22:29:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:15,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009449656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:18,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421214219] [2021-11-12 22:29:18,795 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 22:29:18,795 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:29:18,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:29:18,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:29:18,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:29:18,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,804 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:18,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:29:18,805 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:18,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:29:18,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:29:18,810 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-12 22:29:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 22:29:18,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:18,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:18,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:18,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:18,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:18,859 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:29:18,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:29:18,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:18,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:18,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:18,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:18,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:29:18,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:29:18,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:131, output treesize:110 [2021-11-12 22:29:18,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-12 22:29:18,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 22:29:18,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:29:18,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:29:18,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-12 22:29:18,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:18,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:18,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:18,984 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:18,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 342 [2021-11-12 22:29:18,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:19,074 INFO L180 QuantifierPusher]: treesize reduction 54, result has 50.0 percent of original size [2021-11-12 22:29:19,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 22:29:19,083 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:29:20,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:29:20,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:20,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 33] total 64 [2021-11-12 22:29:20,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171668735] [2021-11-12 22:29:20,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:20,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-12 22:29:20,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-12 22:29:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1129, Invalid=3427, Unknown=0, NotChecked=0, Total=4556 [2021-11-12 22:29:20,126 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 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 22:30:34,873 WARN L227 SmtUtils]: Spent 49.10s on a formula simplification. DAG size of input: 161 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:30:36,887 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse0 (= (mod .cse5 4) 0)) (.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false [2021-11-12 22:31:34,398 WARN L227 SmtUtils]: Spent 27.68s on a formula simplification. DAG size of input: 151 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:10,148 WARN L227 SmtUtils]: Spent 19.43s on a formula simplification. DAG size of input: 146 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:01,938 WARN L227 SmtUtils]: Spent 24.60s on a formula simplification. DAG size of input: 141 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:49,908 WARN L227 SmtUtils]: Spent 18.70s on a formula simplification. DAG size of input: 136 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:34:34,765 WARN L227 SmtUtils]: Spent 17.44s on a formula simplification. DAG size of input: 131 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:35:15,774 WARN L227 SmtUtils]: Spent 16.56s on a formula simplification. DAG size of input: 126 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:36:07,335 WARN L227 SmtUtils]: Spent 15.30s on a formula simplification. DAG size of input: 121 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:36:09,425 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse0 (= (mod .cse5 4) 0)) (.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false [2021-11-12 22:36:50,600 WARN L227 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 111 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:37:27,254 WARN L227 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 106 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:38:04,600 WARN L227 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 101 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:38:38,600 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 96 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:39:17,890 WARN L227 SmtUtils]: Spent 11.20s on a formula simplification. DAG size of input: 91 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:39:53,518 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 86 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)