./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI --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 7d10b612b7800802e72f11ddc9fa5d7db7eebce7 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:22:30,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:30,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:30,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:30,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:30,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:30,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:30,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:30,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:30,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:30,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:30,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:30,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:30,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:30,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:30,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:30,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:30,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:30,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:30,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:30,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:30,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:30,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:30,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:30,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:30,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:30,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:30,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:30,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:30,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:30,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:30,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:30,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:30,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:30,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:30,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:30,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:30,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:30,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:30,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:30,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:30,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:30,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:30,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:30,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:30,216 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:30,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:30,217 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:30,217 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:30,217 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:30,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:30,224 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:30,225 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:30,225 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:30,226 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:30,226 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:30,226 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:30,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:30,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:30,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:30,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:30,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:30,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:30,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:30,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:30,229 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:30,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:30,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:30,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:30,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:30,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:30,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:30,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:30,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:30,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:30,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:30,234 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:30,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:30,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:30,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:30,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:30,235 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_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d10b612b7800802e72f11ddc9fa5d7db7eebce7 [2021-10-11 02:22:30,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:30,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:30,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:30,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:30,521 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:30,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem02_label54.c [2021-10-11 02:22:30,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/data/9a7a970f8/aa9d9dc258d846eda810950aa8bc9261/FLAG3ce3852b2 [2021-10-11 02:22:31,203 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:31,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/sv-benchmarks/c/eca-rers2012/Problem02_label54.c [2021-10-11 02:22:31,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/data/9a7a970f8/aa9d9dc258d846eda810950aa8bc9261/FLAG3ce3852b2 [2021-10-11 02:22:31,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/data/9a7a970f8/aa9d9dc258d846eda810950aa8bc9261 [2021-10-11 02:22:31,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:31,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:31,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:31,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:31,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:31,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:31" (1/1) ... [2021-10-11 02:22:31,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338c2b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:31, skipping insertion in model container [2021-10-11 02:22:31,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:31" (1/1) ... [2021-10-11 02:22:31,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:31,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:31,877 WARN L226 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_df84a21b-3b67-464c-ac9d-93c9f8c52972/sv-benchmarks/c/eca-rers2012/Problem02_label54.c[16901,16914] [2021-10-11 02:22:31,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:31,939 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:32,061 WARN L226 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_df84a21b-3b67-464c-ac9d-93c9f8c52972/sv-benchmarks/c/eca-rers2012/Problem02_label54.c[16901,16914] [2021-10-11 02:22:32,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:32,106 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:32,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32 WrapperNode [2021-10-11 02:22:32,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:32,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:32,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:32,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:32,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:32,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:32,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:32,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:32,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:32,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:32,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:32,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:32,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:22:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:32,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:34,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:34,661 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:22:34,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:34 BoogieIcfgContainer [2021-10-11 02:22:34,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:34,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:34,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:34,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:34,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:31" (1/3) ... [2021-10-11 02:22:34,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d688d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:34, skipping insertion in model container [2021-10-11 02:22:34,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (2/3) ... [2021-10-11 02:22:34,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d688d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:34, skipping insertion in model container [2021-10-11 02:22:34,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:34" (3/3) ... [2021-10-11 02:22:34,676 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2021-10-11 02:22:34,689 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:34,693 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:22:34,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:22:34,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:34,739 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:22:34,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:34,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:34,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:34,740 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:34,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:34,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2021-10-11 02:22:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-11 02:22:34,770 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:34,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:34,771 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:34,778 INFO L82 PathProgramCache]: Analyzing trace with hash 925944902, now seen corresponding path program 1 times [2021-10-11 02:22:34,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:34,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81163042] [2021-10-11 02:22:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:35,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81163042] [2021-10-11 02:22:35,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:35,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:22:35,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733594101] [2021-10-11 02:22:35,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:35,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:35,206 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2021-10-11 02:22:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:35,771 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-10-11 02:22:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:35,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2021-10-11 02:22:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:35,795 INFO L225 Difference]: With dead ends: 251 [2021-10-11 02:22:35,795 INFO L226 Difference]: Without dead ends: 163 [2021-10-11 02:22:35,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-11 02:22:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-10-11 02:22:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-10-11 02:22:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 288 transitions. [2021-10-11 02:22:35,843 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 288 transitions. Word has length 80 [2021-10-11 02:22:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:35,844 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 288 transitions. [2021-10-11 02:22:35,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 288 transitions. [2021-10-11 02:22:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-11 02:22:35,848 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:35,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:35,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:35,849 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash 221745381, now seen corresponding path program 1 times [2021-10-11 02:22:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:35,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260208000] [2021-10-11 02:22:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260208000] [2021-10-11 02:22:35,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:35,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:22:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38678122] [2021-10-11 02:22:35,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:35,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:35,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:35,995 INFO L87 Difference]: Start difference. First operand 163 states and 288 transitions. Second operand 3 states. [2021-10-11 02:22:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:36,444 INFO L93 Difference]: Finished difference Result 485 states and 861 transitions. [2021-10-11 02:22:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:36,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2021-10-11 02:22:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:36,449 INFO L225 Difference]: With dead ends: 485 [2021-10-11 02:22:36,449 INFO L226 Difference]: Without dead ends: 323 [2021-10-11 02:22:36,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-11 02:22:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-11 02:22:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2021-10-11 02:22:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 473 transitions. [2021-10-11 02:22:36,473 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 473 transitions. Word has length 98 [2021-10-11 02:22:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:36,474 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 473 transitions. [2021-10-11 02:22:36,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 473 transitions. [2021-10-11 02:22:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-11 02:22:36,478 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:36,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:36,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:22:36,479 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:36,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1583677943, now seen corresponding path program 1 times [2021-10-11 02:22:36,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:36,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400176126] [2021-10-11 02:22:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:36,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400176126] [2021-10-11 02:22:36,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:36,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:22:36,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84292319] [2021-10-11 02:22:36,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:36,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:36,605 INFO L87 Difference]: Start difference. First operand 323 states and 473 transitions. Second operand 3 states. [2021-10-11 02:22:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:36,843 INFO L93 Difference]: Finished difference Result 645 states and 945 transitions. [2021-10-11 02:22:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:36,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2021-10-11 02:22:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:36,846 INFO L225 Difference]: With dead ends: 645 [2021-10-11 02:22:36,847 INFO L226 Difference]: Without dead ends: 323 [2021-10-11 02:22:36,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-11 02:22:36,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-11 02:22:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2021-10-11 02:22:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 433 transitions. [2021-10-11 02:22:36,868 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 433 transitions. Word has length 99 [2021-10-11 02:22:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:36,869 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 433 transitions. [2021-10-11 02:22:36,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 433 transitions. [2021-10-11 02:22:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-11 02:22:36,872 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:36,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:36,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:22:36,873 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2134437762, now seen corresponding path program 1 times [2021-10-11 02:22:36,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:36,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245999163] [2021-10-11 02:22:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:36,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245999163] [2021-10-11 02:22:36,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928980097] [2021-10-11 02:22:36,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:36,934 INFO L87 Difference]: Start difference. First operand 323 states and 433 transitions. Second operand 3 states. [2021-10-11 02:22:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:37,318 INFO L93 Difference]: Finished difference Result 725 states and 980 transitions. [2021-10-11 02:22:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:37,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2021-10-11 02:22:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:37,321 INFO L225 Difference]: With dead ends: 725 [2021-10-11 02:22:37,322 INFO L226 Difference]: Without dead ends: 403 [2021-10-11 02:22:37,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-11 02:22:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2021-10-11 02:22:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2021-10-11 02:22:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 528 transitions. [2021-10-11 02:22:37,342 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 528 transitions. Word has length 103 [2021-10-11 02:22:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:37,342 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 528 transitions. [2021-10-11 02:22:37,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 528 transitions. [2021-10-11 02:22:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-11 02:22:37,346 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:37,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:37,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:22:37,347 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2118180280, now seen corresponding path program 1 times [2021-10-11 02:22:37,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:37,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124554270] [2021-10-11 02:22:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:37,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124554270] [2021-10-11 02:22:37,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333121846] [2021-10-11 02:22:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:22:37,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-11 02:22:37,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-11 02:22:38,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:22:38,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:22:38,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388609018] [2021-10-11 02:22:38,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:38,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:38,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:22:38,038 INFO L87 Difference]: Start difference. First operand 403 states and 528 transitions. Second operand 3 states. [2021-10-11 02:22:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:38,429 INFO L93 Difference]: Finished difference Result 965 states and 1291 transitions. [2021-10-11 02:22:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:38,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2021-10-11 02:22:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:38,434 INFO L225 Difference]: With dead ends: 965 [2021-10-11 02:22:38,434 INFO L226 Difference]: Without dead ends: 483 [2021-10-11 02:22:38,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:22:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-11 02:22:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-10-11 02:22:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2021-10-11 02:22:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 561 transitions. [2021-10-11 02:22:38,449 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 561 transitions. Word has length 107 [2021-10-11 02:22:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:38,450 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 561 transitions. [2021-10-11 02:22:38,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 561 transitions. [2021-10-11 02:22:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-11 02:22:38,453 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:38,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:38,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:38,676 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -648559543, now seen corresponding path program 1 times [2021-10-11 02:22:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:38,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791617686] [2021-10-11 02:22:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-11 02:22:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791617686] [2021-10-11 02:22:38,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:38,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:38,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757172625] [2021-10-11 02:22:38,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:38,769 INFO L87 Difference]: Start difference. First operand 483 states and 561 transitions. Second operand 3 states. [2021-10-11 02:22:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:39,118 INFO L93 Difference]: Finished difference Result 1365 states and 1593 transitions. [2021-10-11 02:22:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:39,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2021-10-11 02:22:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:39,123 INFO L225 Difference]: With dead ends: 1365 [2021-10-11 02:22:39,123 INFO L226 Difference]: Without dead ends: 803 [2021-10-11 02:22:39,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-11 02:22:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 723. [2021-10-11 02:22:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2021-10-11 02:22:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 816 transitions. [2021-10-11 02:22:39,158 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 816 transitions. Word has length 128 [2021-10-11 02:22:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:39,159 INFO L481 AbstractCegarLoop]: Abstraction has 723 states and 816 transitions. [2021-10-11 02:22:39,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 816 transitions. [2021-10-11 02:22:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-11 02:22:39,161 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:39,162 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:39,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:22:39,162 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1260909869, now seen corresponding path program 1 times [2021-10-11 02:22:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:39,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974205209] [2021-10-11 02:22:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-11 02:22:39,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974205209] [2021-10-11 02:22:39,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:39,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:39,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483031521] [2021-10-11 02:22:39,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:39,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:39,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:39,331 INFO L87 Difference]: Start difference. First operand 723 states and 816 transitions. Second operand 3 states. [2021-10-11 02:22:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:39,639 INFO L93 Difference]: Finished difference Result 1685 states and 1903 transitions. [2021-10-11 02:22:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:39,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2021-10-11 02:22:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:39,645 INFO L225 Difference]: With dead ends: 1685 [2021-10-11 02:22:39,645 INFO L226 Difference]: Without dead ends: 563 [2021-10-11 02:22:39,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-10-11 02:22:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-10-11 02:22:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2021-10-11 02:22:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 612 transitions. [2021-10-11 02:22:39,665 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 612 transitions. Word has length 170 [2021-10-11 02:22:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:39,665 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 612 transitions. [2021-10-11 02:22:39,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 612 transitions. [2021-10-11 02:22:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-10-11 02:22:39,668 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:39,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:39,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:22:39,669 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1719959350, now seen corresponding path program 1 times [2021-10-11 02:22:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875638393] [2021-10-11 02:22:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-11 02:22:39,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875638393] [2021-10-11 02:22:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:39,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892876295] [2021-10-11 02:22:39,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:39,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:39,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:39,826 INFO L87 Difference]: Start difference. First operand 563 states and 612 transitions. Second operand 3 states. [2021-10-11 02:22:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:40,106 INFO L93 Difference]: Finished difference Result 1205 states and 1325 transitions. [2021-10-11 02:22:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:40,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2021-10-11 02:22:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:40,111 INFO L225 Difference]: With dead ends: 1205 [2021-10-11 02:22:40,111 INFO L226 Difference]: Without dead ends: 643 [2021-10-11 02:22:40,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-10-11 02:22:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2021-10-11 02:22:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2021-10-11 02:22:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 693 transitions. [2021-10-11 02:22:40,129 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 693 transitions. Word has length 205 [2021-10-11 02:22:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:40,129 INFO L481 AbstractCegarLoop]: Abstraction has 643 states and 693 transitions. [2021-10-11 02:22:40,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 693 transitions. [2021-10-11 02:22:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-10-11 02:22:40,132 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:40,133 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:40,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:22:40,133 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash -624391203, now seen corresponding path program 1 times [2021-10-11 02:22:40,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:40,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740341362] [2021-10-11 02:22:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-11 02:22:40,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740341362] [2021-10-11 02:22:40,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830241862] [2021-10-11 02:22:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:22:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-10-11 02:22:40,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-10-11 02:22:41,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:22:41,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-10-11 02:22:41,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260767084] [2021-10-11 02:22:41,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:41,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:41,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:22:41,098 INFO L87 Difference]: Start difference. First operand 643 states and 693 transitions. Second operand 3 states. [2021-10-11 02:22:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:41,360 INFO L93 Difference]: Finished difference Result 1125 states and 1222 transitions. [2021-10-11 02:22:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:41,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2021-10-11 02:22:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:41,367 INFO L225 Difference]: With dead ends: 1125 [2021-10-11 02:22:41,368 INFO L226 Difference]: Without dead ends: 1123 [2021-10-11 02:22:41,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 427 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:22:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-10-11 02:22:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-10-11 02:22:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1123 states. [2021-10-11 02:22:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1219 transitions. [2021-10-11 02:22:41,403 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1219 transitions. Word has length 215 [2021-10-11 02:22:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:41,404 INFO L481 AbstractCegarLoop]: Abstraction has 1123 states and 1219 transitions. [2021-10-11 02:22:41,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1219 transitions. [2021-10-11 02:22:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-10-11 02:22:41,409 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:41,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:41,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:41,624 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1584104517, now seen corresponding path program 1 times [2021-10-11 02:22:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:41,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140420443] [2021-10-11 02:22:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 190 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-11 02:22:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140420443] [2021-10-11 02:22:41,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542824175] [2021-10-11 02:22:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:22:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 239 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-11 02:22:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 239 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-11 02:22:42,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697636047] [2021-10-11 02:22:42,621 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2021-10-11 02:22:42,621 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:42,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:42,631 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:42,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:43,179 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-10-11 02:22:43,295 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-10-11 02:22:50,469 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-10-11 02:22:50,574 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-10-11 02:22:52,985 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:53,123 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:53,346 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:53,478 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:53,645 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:53,771 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:53,976 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 153 [2021-10-11 02:22:54,106 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:54,257 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:54,384 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:54,532 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-10-11 02:22:57,402 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:57,546 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:57,786 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:57,922 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:58,097 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:58,218 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:58,404 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 153 [2021-10-11 02:22:58,527 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:58,654 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:22:58,815 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-10-11 02:23:03,536 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2021-10-11 02:23:03,626 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7060 conjuctions. This might take some time... [2021-10-11 02:23:03,872 INFO L193 XnfTransformerHelper]: Simplified to disjunction of 320 conjuctions. [2021-10-11 02:23:03,878 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2021-10-11 02:23:03,942 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7060 conjuctions. This might take some time... [2021-10-11 02:23:04,236 INFO L193 XnfTransformerHelper]: Simplified to disjunction of 320 conjuctions. [2021-10-11 02:23:04,362 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2021-10-11 02:23:04,404 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7060 conjuctions. This might take some time... [2021-10-11 02:23:04,599 INFO L193 XnfTransformerHelper]: Simplified to disjunction of 320 conjuctions. [2021-10-11 02:23:07,743 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:08,362 WARN L197 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 98 [2021-10-11 02:23:08,650 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-10-11 02:23:08,808 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-10-11 02:23:09,130 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2021-10-11 02:23:09,479 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2021-10-11 02:23:09,868 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-10-11 02:23:10,119 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-10-11 02:23:10,539 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-10-11 02:23:13,133 WARN L197 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 112 [2021-10-11 02:23:18,347 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:18,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:18,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-10-11 02:23:18,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913753231] [2021-10-11 02:23:18,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:23:18,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:23:18,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:23:18,350 INFO L87 Difference]: Start difference. First operand 1123 states and 1219 transitions. Second operand 8 states. [2021-10-11 02:23:19,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:19,597 INFO L93 Difference]: Finished difference Result 2275 states and 2466 transitions. [2021-10-11 02:23:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:23:19,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 228 [2021-10-11 02:23:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:19,603 INFO L225 Difference]: With dead ends: 2275 [2021-10-11 02:23:19,603 INFO L226 Difference]: Without dead ends: 901 [2021-10-11 02:23:19,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 488 SyntacticMatches, 187 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:23:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-10-11 02:23:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 803. [2021-10-11 02:23:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2021-10-11 02:23:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 860 transitions. [2021-10-11 02:23:19,631 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 860 transitions. Word has length 228 [2021-10-11 02:23:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:19,632 INFO L481 AbstractCegarLoop]: Abstraction has 803 states and 860 transitions. [2021-10-11 02:23:19,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:23:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 860 transitions. [2021-10-11 02:23:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-10-11 02:23:19,636 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:19,637 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:19,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-11 02:23:19,852 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1212366178, now seen corresponding path program 1 times [2021-10-11 02:23:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:19,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418948295] [2021-10-11 02:23:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 212 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418948295] [2021-10-11 02:23:20,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554914602] [2021-10-11 02:23:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:20,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-11 02:23:20,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-11 02:23:21,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:23:21,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 10 [2021-10-11 02:23:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896671125] [2021-10-11 02:23:21,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:21,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:21,215 INFO L87 Difference]: Start difference. First operand 803 states and 860 transitions. Second operand 4 states. [2021-10-11 02:23:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:21,641 INFO L93 Difference]: Finished difference Result 1043 states and 1118 transitions. [2021-10-11 02:23:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:21,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 278 [2021-10-11 02:23:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:21,642 INFO L225 Difference]: With dead ends: 1043 [2021-10-11 02:23:21,642 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:23:21,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:23:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:23:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:23:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:23:21,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 278 [2021-10-11 02:23:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:21,645 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:23:21,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:23:21,645 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:23:21,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:21,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:23:22,356 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-10-11 02:23:22,764 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-10-11 02:23:22,767 INFO L262 CegarLoopResult]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-10-11 02:23:22,768 INFO L262 CegarLoopResult]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 485) no Hoare annotation was computed. [2021-10-11 02:23:22,769 INFO L262 CegarLoopResult]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-10-11 02:23:22,770 INFO L262 CegarLoopResult]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-10-11 02:23:22,771 INFO L262 CegarLoopResult]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-10-11 02:23:22,771 INFO L258 CegarLoopResult]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse1 (<= 10 ~a28~0)) (.cse6 (= ~a25~0 ~a11~0)) (.cse7 (= ~a25~0 0)) (.cse3 (<= ~a28~0 10)) (.cse10 (= ~a11~0 1)) (.cse5 (<= ~a28~0 7)) (.cse8 (= ~a21~0 1)) (.cse9 (= ~a17~0 8)) (.cse0 (= ~a19~0 1)) (.cse4 (= ~a25~0 1)) (.cse2 (<= ~a17~0 8))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse0 .cse4 .cse5 .cse2) (and .cse6 .cse7 .cse8 .cse9 .cse5) (and .cse1 .cse2 .cse10 .cse3) (and .cse4 .cse10 .cse2 .cse3) (and .cse6 .cse7 .cse8 .cse9 (= ~a28~0 8)) (and .cse6 .cse0 .cse7 .cse8 .cse9 .cse3) (and .cse0 .cse10 .cse2 .cse3) (and .cse8 .cse9 .cse4 (= ~a28~0 10)) (and .cse10 .cse5 .cse2) (and .cse0 .cse8 .cse9 .cse4) (and (<= 9 ~a28~0) .cse0 .cse4 .cse2))) [2021-10-11 02:23:22,771 INFO L262 CegarLoopResult]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-10-11 02:23:22,771 INFO L262 CegarLoopResult]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-10-11 02:23:22,771 INFO L265 CegarLoopResult]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-10-11 02:23:22,771 INFO L262 CegarLoopResult]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L481-1(lines 39 608) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L258 CegarLoopResult]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse1 (<= 10 ~a28~0)) (.cse6 (= ~a25~0 ~a11~0)) (.cse7 (= ~a25~0 0)) (.cse3 (<= ~a28~0 10)) (.cse10 (= ~a11~0 1)) (.cse5 (<= ~a28~0 7)) (.cse8 (= ~a21~0 1)) (.cse9 (= ~a17~0 8)) (.cse0 (= ~a19~0 1)) (.cse4 (= ~a25~0 1)) (.cse2 (<= ~a17~0 8))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse0 .cse4 .cse5 .cse2) (and .cse6 .cse7 .cse8 .cse9 .cse5) (and .cse1 .cse2 .cse10 .cse3) (and .cse4 .cse10 .cse2 .cse3) (and .cse6 .cse7 .cse8 .cse9 (= ~a28~0 8)) (and .cse6 .cse0 .cse7 .cse8 .cse9 .cse3) (and .cse0 .cse10 .cse2 .cse3) (and .cse8 .cse9 .cse4 (= ~a28~0 10)) (and .cse10 .cse5 .cse2) (and .cse0 .cse8 .cse9 .cse4) (and (<= 9 ~a28~0) .cse0 .cse4 .cse2))) [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L484-1(lines 39 608) no Hoare annotation was computed. [2021-10-11 02:23:22,772 INFO L262 CegarLoopResult]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L485(line 485) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L621(line 621) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-10-11 02:23:22,773 INFO L262 CegarLoopResult]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-10-11 02:23:22,774 INFO L262 CegarLoopResult]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-10-11 02:23:22,774 INFO L262 CegarLoopResult]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-10-11 02:23:22,774 INFO L262 CegarLoopResult]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-10-11 02:23:22,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:22 BoogieIcfgContainer [2021-10-11 02:23:22,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:22,812 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:22,812 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:22,813 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:22,813 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:34" (3/4) ... [2021-10-11 02:23:22,816 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:23:22,846 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 114 nodes and edges [2021-10-11 02:23:22,848 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:23:22,850 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-11 02:23:22,852 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:23:23,002 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df84a21b-3b67-464c-ac9d-93c9f8c52972/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:23,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:23,003 INFO L168 Benchmark]: Toolchain (without parser) took 51549.36 ms. Allocated memory was 92.3 MB in the beginning and 914.4 MB in the end (delta: 822.1 MB). Free memory was 56.2 MB in the beginning and 545.9 MB in the end (delta: -489.7 MB). Peak memory consumption was 331.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,004 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 62.7 MB in the beginning and 62.6 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:23,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 653.17 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 56.0 MB in the beginning and 75.9 MB in the end (delta: -19.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.29 ms. Allocated memory is still 115.3 MB. Free memory was 75.9 MB in the beginning and 70.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,005 INFO L168 Benchmark]: Boogie Preprocessor took 60.99 ms. Allocated memory is still 115.3 MB. Free memory was 70.5 MB in the beginning and 65.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,005 INFO L168 Benchmark]: RCFGBuilder took 2397.28 ms. Allocated memory was 115.3 MB in the beginning and 144.7 MB in the end (delta: 29.4 MB). Free memory was 65.7 MB in the beginning and 101.0 MB in the end (delta: -35.3 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,006 INFO L168 Benchmark]: TraceAbstraction took 48143.35 ms. Allocated memory was 144.7 MB in the beginning and 914.4 MB in the end (delta: 769.7 MB). Free memory was 99.9 MB in the beginning and 560.6 MB in the end (delta: -460.7 MB). Peak memory consumption was 309.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,006 INFO L168 Benchmark]: Witness Printer took 190.40 ms. Allocated memory is still 914.4 MB. Free memory was 560.6 MB in the beginning and 545.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:23,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 62.7 MB in the beginning and 62.6 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 653.17 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 56.0 MB in the beginning and 75.9 MB in the end (delta: -19.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 97.29 ms. Allocated memory is still 115.3 MB. Free memory was 75.9 MB in the beginning and 70.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.99 ms. Allocated memory is still 115.3 MB. Free memory was 70.5 MB in the beginning and 65.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2397.28 ms. Allocated memory was 115.3 MB in the beginning and 144.7 MB in the end (delta: 29.4 MB). Free memory was 65.7 MB in the beginning and 101.0 MB in the end (delta: -35.3 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 48143.35 ms. Allocated memory was 144.7 MB in the beginning and 914.4 MB in the end (delta: 769.7 MB). Free memory was 99.9 MB in the beginning and 560.6 MB in the end (delta: -460.7 MB). Peak memory consumption was 309.0 MB. Max. memory is 16.1 GB. * Witness Printer took 190.40 ms. Allocated memory is still 914.4 MB. Free memory was 560.6 MB in the beginning and 545.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 485]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: (((((((((((((a19 == 1 && 10 <= a28) && a17 <= 8) && a28 <= 10) || (((a19 == 1 && a25 == 1) && a28 <= 7) && a17 <= 8)) || ((((a25 == a11 && a25 == 0) && a21 == 1) && a17 == 8) && a28 <= 7)) || (((10 <= a28 && a17 <= 8) && a11 == 1) && a28 <= 10)) || (((a25 == 1 && a11 == 1) && a17 <= 8) && a28 <= 10)) || ((((a25 == a11 && a25 == 0) && a21 == 1) && a17 == 8) && a28 == 8)) || (((((a25 == a11 && a19 == 1) && a25 == 0) && a21 == 1) && a17 == 8) && a28 <= 10)) || (((a19 == 1 && a11 == 1) && a17 <= 8) && a28 <= 10)) || (((a21 == 1 && a17 == 8) && a25 == 1) && a28 == 10)) || ((a11 == 1 && a28 <= 7) && a17 <= 8)) || (((a19 == 1 && a21 == 1) && a17 == 8) && a25 == 1)) || (((9 <= a28 && a19 == 1) && a25 == 1) && a17 <= 8) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((((a19 == 1 && 10 <= a28) && a17 <= 8) && a28 <= 10) || (((a19 == 1 && a25 == 1) && a28 <= 7) && a17 <= 8)) || ((((a25 == a11 && a25 == 0) && a21 == 1) && a17 == 8) && a28 <= 7)) || (((10 <= a28 && a17 <= 8) && a11 == 1) && a28 <= 10)) || (((a25 == 1 && a11 == 1) && a17 <= 8) && a28 <= 10)) || ((((a25 == a11 && a25 == 0) && a21 == 1) && a17 == 8) && a28 == 8)) || (((((a25 == a11 && a19 == 1) && a25 == 0) && a21 == 1) && a17 == 8) && a28 <= 10)) || (((a19 == 1 && a11 == 1) && a17 <= 8) && a28 <= 10)) || (((a21 == 1 && a17 == 8) && a25 == 1) && a28 == 10)) || ((a11 == 1 && a28 <= 7) && a17 <= 8)) || (((a19 == 1 && a21 == 1) && a17 == 8) && a25 == 1)) || (((9 <= a28 && a19 == 1) && a25 == 1) && a17 <= 8) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47.1s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 613 SDtfs, 723 SDslu, 96 SDs, 0 SdLazy, 3252 SolverSat, 474 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1919 GetRequests, 1690 SyntacticMatches, 189 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1123occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 178 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 333 HoareAnnotationTreeSize, 3 FomulaSimplifications, 788 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 172 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 2539 NumberOfCodeBlocks, 2539 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 3348 ConstructedInterpolants, 0 QuantifiedInterpolants, 2691962 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1582 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 19 InterpolantComputations, 13 PerfectInterpolantSequences, 3004/3510 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...