./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.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_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/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_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/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_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:42:35,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:42:35,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:42:35,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:42:35,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:42:35,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:42:35,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:42:35,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:42:35,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:42:35,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:42:35,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:42:35,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:42:35,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:42:35,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:42:35,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:42:35,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:42:35,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:42:35,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:42:35,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:42:35,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:42:35,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:42:35,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:42:35,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:42:35,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:42:35,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:42:35,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:42:35,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:42:35,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:42:35,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:42:35,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:42:35,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:42:35,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:42:35,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:42:35,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:42:35,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:42:35,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:42:35,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:42:35,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:42:35,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:42:35,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:42:35,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:42:35,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:42:35,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:42:35,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:42:35,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:42:35,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:42:35,168 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:42:35,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:42:35,169 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:42:35,169 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:42:35,169 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:42:35,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:42:35,170 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:42:35,170 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:42:35,171 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:42:35,171 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:42:35,171 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:42:35,171 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:42:35,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:42:35,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:42:35,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:42:35,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:42:35,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:42:35,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:42:35,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:42:35,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:42:35,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:42:35,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:42:35,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:42:35,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:42:35,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:42:35,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:42:35,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:42:35,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:35,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:42:35,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:42:35,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:42:35,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:42:35,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:42:35,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:42:35,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:42:35,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:42:35,179 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_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2021-11-12 23:42:35,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:42:35,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:42:35,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:42:35,539 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:42:35,540 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:42:35,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-fpi/pcompf.c [2021-11-12 23:42:35,604 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/data/5950fefbe/83a4e317ea874afea087338283d56af0/FLAG414ed8c4d [2021-11-12 23:42:36,144 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:42:36,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/sv-benchmarks/c/array-fpi/pcompf.c [2021-11-12 23:42:36,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/data/5950fefbe/83a4e317ea874afea087338283d56af0/FLAG414ed8c4d [2021-11-12 23:42:36,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/data/5950fefbe/83a4e317ea874afea087338283d56af0 [2021-11-12 23:42:36,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:42:36,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:42:36,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:36,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:42:36,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:42:36,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad5d52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36, skipping insertion in model container [2021-11-12 23:42:36,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:42:36,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:42:36,758 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_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-12 23:42:36,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:36,785 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:42:36,797 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_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-12 23:42:36,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:36,821 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:42:36,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36 WrapperNode [2021-11-12 23:42:36,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:36,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:42:36,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:42:36,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:42:36,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:42:36,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:42:36,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:42:36,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:42:36,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:42:36,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:42:36,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:42:36,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:42:36,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (1/1) ... [2021-11-12 23:42:36,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:36,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:42:36,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:42:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:42:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:42:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 23:42:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:42:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:42:36,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:42:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 23:42:37,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:42:37,288 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 23:42:37,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:42:37 BoogieIcfgContainer [2021-11-12 23:42:37,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:42:37,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:42:37,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:42:37,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:42:37,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:42:36" (1/3) ... [2021-11-12 23:42:37,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a13a715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:42:37, skipping insertion in model container [2021-11-12 23:42:37,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:36" (2/3) ... [2021-11-12 23:42:37,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a13a715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:42:37, skipping insertion in model container [2021-11-12 23:42:37,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:42:37" (3/3) ... [2021-11-12 23:42:37,300 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.c [2021-11-12 23:42:37,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:42:37,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:42:37,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:42:37,374 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:42:37,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:42:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:42:37,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:37,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:37,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2021-11-12 23:42:37,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:37,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865866475] [2021-11-12 23:42:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:37,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:37,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:42:37,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971424312] [2021-11-12 23:42:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:37,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:37,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:37,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:37,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:42:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:42:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:37,854 INFO L354 Elim1Store]: treesize reduction 55, result has 40.9 percent of original size [2021-11-12 23:42:37,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 45 [2021-11-12 23:42:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:38,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:38,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:38,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865866475] [2021-11-12 23:42:38,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:42:38,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971424312] [2021-11-12 23:42:38,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971424312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:38,088 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:38,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:42:38,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142508199] [2021-11-12 23:42:38,091 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:38,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:42:38,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:42:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:38,122 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:38,284 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-11-12 23:42:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:42:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:42:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:38,297 INFO L225 Difference]: With dead ends: 37 [2021-11-12 23:42:38,297 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 23:42:38,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:38,304 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.29ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:38,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 82 Unknown, 0 Unchecked, 6.29ms Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 98.14ms Time] [2021-11-12 23:42:38,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 23:42:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2021-11-12 23:42:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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 23:42:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2021-11-12 23:42:38,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2021-11-12 23:42:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:38,342 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2021-11-12 23:42:38,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2021-11-12 23:42:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:42:38,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:38,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:38,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:38,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-12 23:42:38,569 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2021-11-12 23:42:38,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:38,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820121396] [2021-11-12 23:42:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:38,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:38,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:42:38,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134553418] [2021-11-12 23:42:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:38,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:38,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:38,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:42:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:42:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:38,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:38,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820121396] [2021-11-12 23:42:38,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:42:38,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134553418] [2021-11-12 23:42:38,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134553418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:38,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:38,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 23:42:38,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100507985] [2021-11-12 23:42:38,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:38,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:42:38,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:42:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:42:38,756 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:38,836 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-12 23:42:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:42:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 23:42:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:38,840 INFO L225 Difference]: With dead ends: 36 [2021-11-12 23:42:38,840 INFO L226 Difference]: Without dead ends: 29 [2021-11-12 23:42:38,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:42:38,846 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:38,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [17 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 54.61ms Time] [2021-11-12 23:42:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-12 23:42:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2021-11-12 23:42:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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 23:42:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-12 23:42:38,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-11-12 23:42:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:38,863 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-12 23:42:38,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-12 23:42:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:42:38,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:38,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:38,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-12 23:42:39,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:39,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2021-11-12 23:42:39,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:39,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231015923] [2021-11-12 23:42:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:39,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:39,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:42:39,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606038604] [2021-11-12 23:42:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:39,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:39,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:39,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:42:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:42:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:39,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:39,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:39,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231015923] [2021-11-12 23:42:39,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:42:39,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606038604] [2021-11-12 23:42:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606038604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:39,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463963273] [2021-11-12 23:42:39,332 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:42:39,340 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:42:39,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:42:39,349 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:42:39,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:42:39,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,409 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:39,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:42:39,412 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:39,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:42:39,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:42:39,429 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_20|], 21=[|v_#valid_21|]} [2021-11-12 23:42:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:42:39,442 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:42:39,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:42:39,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:39,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:42:39,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:42:39,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:42:39,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:39,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-12 23:42:39,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:124, output treesize:99 [2021-11-12 23:42:39,559 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.8 percent of original size [2021-11-12 23:42:39,561 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:39,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:42:39,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:39,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:42:39,567 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:39,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-12 23:42:39,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 276 [2021-11-12 23:42:39,602 INFO L446 ElimStorePlain]: Different costs {12=[|v_#length_21|], 45=[|v_#valid_22|]} [2021-11-12 23:42:39,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-12 23:42:39,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:42:39,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:42:39,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,697 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-12 23:42:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-11-12 23:42:39,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-12 23:42:39,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-12 23:42:39,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:39,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,886 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-12 23:42:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-12 23:42:39,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-12 23:42:39,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-12 23:42:39,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:39,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:39,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 44 [2021-11-12 23:42:39,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:42:39,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:42:39,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:39,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:39,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:39,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-11-12 23:42:40,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,003 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:518, output treesize:214 [2021-11-12 23:42:40,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:40,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-12 23:42:40,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-12 23:42:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:40,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 72 [2021-11-12 23:42:40,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:42:40,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:42:40,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 249 [2021-11-12 23:42:40,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:248, output treesize:249 [2021-11-12 23:42:40,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,375 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:40,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,386 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:40,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-12 23:42:40,393 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:40,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:42:40,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 524 [2021-11-12 23:42:40,406 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:40,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 494 [2021-11-12 23:42:40,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 579 [2021-11-12 23:42:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 89 [2021-11-12 23:42:40,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-12 23:42:40,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-12 23:42:40,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 72 [2021-11-12 23:42:40,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:42:40,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:42:40,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,680 INFO L180 QuantifierPusher]: treesize reduction 145, result has 78.1 percent of original size [2021-11-12 23:42:40,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 518 [2021-11-12 23:42:40,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:42:40,693 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:686, output treesize:518 [2021-11-12 23:42:40,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,843 INFO L180 QuantifierPusher]: treesize reduction 54, result has 62.5 percent of original size [2021-11-12 23:42:40,849 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:42:40,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-12 23:42:40,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:42:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-12 23:42:40,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:42:40,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:42:40,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:42:40,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-12 23:42:40,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:42:40,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:83 [2021-11-12 23:42:40,886 INFO L180 QuantifierPusher]: treesize reduction 55, result has 53.0 percent of original size [2021-11-12 23:42:40,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:42:40,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:42:40,895 INFO L185 QuantifierPusher]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-11-12 23:42:40,899 INFO L180 QuantifierPusher]: treesize reduction 5, result has 92.5 percent of original size [2021-11-12 23:42:40,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:42:40,909 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:42:41,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:42:41,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:41,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-12 23:42:41,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635221909] [2021-11-12 23:42:41,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-12 23:42:41,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:42:41,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:41,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:42:41,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:41,531 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:41,615 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-12 23:42:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:42:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 23:42:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:41,617 INFO L225 Difference]: With dead ends: 33 [2021-11-12 23:42:41,617 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:42:41,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:42:41,618 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:41,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 62 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 52.62ms Time] [2021-11-12 23:42:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:42:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-11-12 23:42:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 23:42:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-12 23:42:41,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2021-11-12 23:42:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:41,623 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-12 23:42:41,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-12 23:42:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:42:41,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:41,624 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:41,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:41,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:41,837 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:41,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2021-11-12 23:42:41,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:41,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074055239] [2021-11-12 23:42:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:41,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:41,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:42:41,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292053651] [2021-11-12 23:42:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:41,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:41,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:42:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:41,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:42:41,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:42,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:42,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:42,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074055239] [2021-11-12 23:42:42,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:42:42,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292053651] [2021-11-12 23:42:42,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292053651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:42,062 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:42,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:42:42,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529229436] [2021-11-12 23:42:42,063 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:42,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:42:42,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:42:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:42:42,066 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:42,137 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-12 23:42:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:42:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) Word has length 11 [2021-11-12 23:42:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:42,138 INFO L225 Difference]: With dead ends: 29 [2021-11-12 23:42:42,138 INFO L226 Difference]: Without dead ends: 18 [2021-11-12 23:42:42,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:42:42,142 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:42,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 53 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 43.67ms Time] [2021-11-12 23:42:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-12 23:42:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-12 23:42:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-12 23:42:42,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2021-11-12 23:42:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:42,149 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-12 23:42:42,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-12 23:42:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:42:42,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:42,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:42,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:42,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:42,371 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2021-11-12 23:42:42,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:42,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891276193] [2021-11-12 23:42:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:42,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:42,402 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:42:42,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274797826] [2021-11-12 23:42:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:42,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:42,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:42,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb4c581-3383-4f34-a2b1-2eebd8d7b63f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:42:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:42:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:42,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-12 23:42:42,504 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-12 23:42:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 30 [2021-11-12 23:42:42,651 INFO L354 Elim1Store]: treesize reduction 113, result has 33.5 percent of original size [2021-11-12 23:42:42,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 94 [2021-11-12 23:42:43,504 INFO L354 Elim1Store]: treesize reduction 373, result has 39.4 percent of original size [2021-11-12 23:42:43,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 108 treesize of output 306