./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label53.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_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/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_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label53.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/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_a4f8b5ee-222c-4c00-b648-eb02394ff428/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 2ac1cca436dbb0ff666a046c15c87b345ed083b6 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:31:10,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:10,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:10,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:10,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:10,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:10,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:10,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:10,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:10,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:10,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:10,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:10,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:10,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:10,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:10,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:10,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:10,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:10,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:10,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:10,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:10,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:10,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:10,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:10,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:10,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:10,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:10,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:10,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:10,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:10,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:10,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:10,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:10,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:10,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:10,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:10,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:10,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:10,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:10,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:10,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:10,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:10,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:10,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:10,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:10,280 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:10,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:10,281 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:10,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:10,281 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:10,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:10,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:10,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:10,283 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:10,284 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:10,284 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:10,284 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:10,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:10,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:10,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:10,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:10,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:10,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:10,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:10,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:10,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:10,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:10,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:10,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:10,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:10,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:10,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:10,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:10,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:10,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:10,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:10,291 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:10,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:10,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:10,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:10,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:10,292 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_a4f8b5ee-222c-4c00-b648-eb02394ff428/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ac1cca436dbb0ff666a046c15c87b345ed083b6 [2021-10-11 02:31:10,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:10,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:10,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:10,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:10,566 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:10,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label53.c [2021-10-11 02:31:10,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/data/a65f7ee13/7251dd9ce9204252adc39d0dfaf1dcfe/FLAG51e743846 [2021-10-11 02:31:11,279 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:11,280 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/sv-benchmarks/c/eca-rers2012/Problem01_label53.c [2021-10-11 02:31:11,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/data/a65f7ee13/7251dd9ce9204252adc39d0dfaf1dcfe/FLAG51e743846 [2021-10-11 02:31:11,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/data/a65f7ee13/7251dd9ce9204252adc39d0dfaf1dcfe [2021-10-11 02:31:11,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:11,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:11,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:11,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:11,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:11,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:11" (1/1) ... [2021-10-11 02:31:11,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4cbc6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:11, skipping insertion in model container [2021-10-11 02:31:11,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:11" (1/1) ... [2021-10-11 02:31:11,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:11,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:11,938 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_a4f8b5ee-222c-4c00-b648-eb02394ff428/sv-benchmarks/c/eca-rers2012/Problem01_label53.c[19724,19737] [2021-10-11 02:31:11,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:11,980 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:12,130 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_a4f8b5ee-222c-4c00-b648-eb02394ff428/sv-benchmarks/c/eca-rers2012/Problem01_label53.c[19724,19737] [2021-10-11 02:31:12,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:12,168 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:12,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12 WrapperNode [2021-10-11 02:31:12,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:12,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:12,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:12,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:12,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:12,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:12,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:12,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:12,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... [2021-10-11 02:31:12,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:12,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:12,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:12,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:12,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/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 02:31:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:12,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:15,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:15,321 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:31:15,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:15 BoogieIcfgContainer [2021-10-11 02:31:15,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:15,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:15,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:15,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:15,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:11" (1/3) ... [2021-10-11 02:31:15,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b3982e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:15, skipping insertion in model container [2021-10-11 02:31:15,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:12" (2/3) ... [2021-10-11 02:31:15,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b3982e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:15, skipping insertion in model container [2021-10-11 02:31:15,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:15" (3/3) ... [2021-10-11 02:31:15,336 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label53.c [2021-10-11 02:31:15,353 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:15,356 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:15,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:15,404 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:15,404 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:15,404 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:15,404 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:15,404 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:15,404 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:15,405 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:15,405 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:31:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:31:15,431 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:15,431 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] [2021-10-11 02:31:15,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1806908504, now seen corresponding path program 1 times [2021-10-11 02:31:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:15,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988781733] [2021-10-11 02:31:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:15,839 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 02:31:15,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988781733] [2021-10-11 02:31:15,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:15,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:15,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856947022] [2021-10-11 02:31:15,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:15,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:15,863 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:31:16,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:16,675 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:31:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:16,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:31:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:16,706 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:31:16,707 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:31:16,713 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 02:31:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:31:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:31:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:31:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2021-10-11 02:31:16,786 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2021-10-11 02:31:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:16,787 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2021-10-11 02:31:16,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2021-10-11 02:31:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-11 02:31:16,793 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:16,793 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-10-11 02:31:16,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:16,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1034852997, now seen corresponding path program 1 times [2021-10-11 02:31:16,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:16,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172257736] [2021-10-11 02:31:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:16,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172257736] [2021-10-11 02:31:16,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:16,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:16,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272750601] [2021-10-11 02:31:16,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:16,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:16,903 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand 3 states. [2021-10-11 02:31:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:17,500 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2021-10-11 02:31:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:17,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2021-10-11 02:31:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:17,503 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:31:17,503 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:31:17,505 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 02:31:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:31:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:31:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:31:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 485 transitions. [2021-10-11 02:31:17,522 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 485 transitions. Word has length 77 [2021-10-11 02:31:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:17,523 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 485 transitions. [2021-10-11 02:31:17,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 485 transitions. [2021-10-11 02:31:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-11 02:31:17,526 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:17,527 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:17,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:17,527 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:17,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1786346006, now seen corresponding path program 1 times [2021-10-11 02:31:17,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:17,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220980632] [2021-10-11 02:31:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:17,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220980632] [2021-10-11 02:31:17,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:17,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128874780] [2021-10-11 02:31:17,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:17,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:17,603 INFO L87 Difference]: Start difference. First operand 287 states and 485 transitions. Second operand 3 states. [2021-10-11 02:31:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:18,232 INFO L93 Difference]: Finished difference Result 857 states and 1452 transitions. [2021-10-11 02:31:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:18,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2021-10-11 02:31:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:18,237 INFO L225 Difference]: With dead ends: 857 [2021-10-11 02:31:18,237 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:31:18,239 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 02:31:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:31:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:31:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:31:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 895 transitions. [2021-10-11 02:31:18,286 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 895 transitions. Word has length 92 [2021-10-11 02:31:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:18,286 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 895 transitions. [2021-10-11 02:31:18,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 895 transitions. [2021-10-11 02:31:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-11 02:31:18,301 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:18,302 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:18,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:31:18,302 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash 525298902, now seen corresponding path program 1 times [2021-10-11 02:31:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:18,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453105458] [2021-10-11 02:31:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453105458] [2021-10-11 02:31:18,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:18,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646501989] [2021-10-11 02:31:18,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:18,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:18,478 INFO L87 Difference]: Start difference. First operand 571 states and 895 transitions. Second operand 4 states. [2021-10-11 02:31:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:19,169 INFO L93 Difference]: Finished difference Result 1141 states and 1789 transitions. [2021-10-11 02:31:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:19,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2021-10-11 02:31:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:19,176 INFO L225 Difference]: With dead ends: 1141 [2021-10-11 02:31:19,176 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:31:19,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:31:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:31:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:31:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 859 transitions. [2021-10-11 02:31:19,197 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 859 transitions. Word has length 105 [2021-10-11 02:31:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:19,197 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 859 transitions. [2021-10-11 02:31:19,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 859 transitions. [2021-10-11 02:31:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-11 02:31:19,200 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:19,200 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:19,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:31:19,200 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -863062240, now seen corresponding path program 1 times [2021-10-11 02:31:19,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:19,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44303300] [2021-10-11 02:31:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 02:31:19,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44303300] [2021-10-11 02:31:19,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:19,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283648227] [2021-10-11 02:31:19,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:19,289 INFO L87 Difference]: Start difference. First operand 571 states and 859 transitions. Second operand 3 states. [2021-10-11 02:31:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:19,778 INFO L93 Difference]: Finished difference Result 1283 states and 1913 transitions. [2021-10-11 02:31:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:19,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2021-10-11 02:31:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:19,790 INFO L225 Difference]: With dead ends: 1283 [2021-10-11 02:31:19,790 INFO L226 Difference]: Without dead ends: 713 [2021-10-11 02:31:19,791 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 02:31:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-11 02:31:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 571. [2021-10-11 02:31:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:31:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 847 transitions. [2021-10-11 02:31:19,812 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 847 transitions. Word has length 109 [2021-10-11 02:31:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:19,812 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 847 transitions. [2021-10-11 02:31:19,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 847 transitions. [2021-10-11 02:31:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-11 02:31:19,814 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:19,815 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:19,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:31:19,815 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1821420248, now seen corresponding path program 1 times [2021-10-11 02:31:19,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:19,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875079243] [2021-10-11 02:31:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 02:31:19,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875079243] [2021-10-11 02:31:19,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:19,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345696732] [2021-10-11 02:31:19,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:19,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:19,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:19,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:19,894 INFO L87 Difference]: Start difference. First operand 571 states and 847 transitions. Second operand 4 states. [2021-10-11 02:31:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:20,728 INFO L93 Difference]: Finished difference Result 1709 states and 2490 transitions. [2021-10-11 02:31:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:20,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2021-10-11 02:31:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:20,741 INFO L225 Difference]: With dead ends: 1709 [2021-10-11 02:31:20,741 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:31:20,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:31:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-10-11 02:31:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2021-10-11 02:31:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1021 transitions. [2021-10-11 02:31:20,782 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1021 transitions. Word has length 113 [2021-10-11 02:31:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:20,790 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1021 transitions. [2021-10-11 02:31:20,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1021 transitions. [2021-10-11 02:31:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-11 02:31:20,795 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:20,796 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:20,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:31:20,796 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1123298316, now seen corresponding path program 1 times [2021-10-11 02:31:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:20,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058516444] [2021-10-11 02:31:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-11 02:31:20,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058516444] [2021-10-11 02:31:20,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:20,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:20,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284045163] [2021-10-11 02:31:20,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:20,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:20,920 INFO L87 Difference]: Start difference. First operand 784 states and 1021 transitions. Second operand 3 states. [2021-10-11 02:31:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:21,463 INFO L93 Difference]: Finished difference Result 1851 states and 2395 transitions. [2021-10-11 02:31:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:21,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2021-10-11 02:31:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:21,470 INFO L225 Difference]: With dead ends: 1851 [2021-10-11 02:31:21,470 INFO L226 Difference]: Without dead ends: 1068 [2021-10-11 02:31:21,472 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 02:31:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-11 02:31:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2021-10-11 02:31:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2021-10-11 02:31:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1191 transitions. [2021-10-11 02:31:21,504 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1191 transitions. Word has length 122 [2021-10-11 02:31:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:21,504 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1191 transitions. [2021-10-11 02:31:21,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1191 transitions. [2021-10-11 02:31:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-11 02:31:21,508 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:21,508 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2021-10-11 02:31:21,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:31:21,509 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1134309882, now seen corresponding path program 1 times [2021-10-11 02:31:21,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:21,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158843217] [2021-10-11 02:31:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-11 02:31:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158843217] [2021-10-11 02:31:21,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:21,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:21,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258155827] [2021-10-11 02:31:21,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:21,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:21,643 INFO L87 Difference]: Start difference. First operand 926 states and 1191 transitions. Second operand 3 states. [2021-10-11 02:31:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:22,087 INFO L93 Difference]: Finished difference Result 1993 states and 2559 transitions. [2021-10-11 02:31:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:22,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2021-10-11 02:31:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:22,095 INFO L225 Difference]: With dead ends: 1993 [2021-10-11 02:31:22,095 INFO L226 Difference]: Without dead ends: 1068 [2021-10-11 02:31:22,097 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 02:31:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-11 02:31:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2021-10-11 02:31:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2021-10-11 02:31:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1355 transitions. [2021-10-11 02:31:22,128 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1355 transitions. Word has length 138 [2021-10-11 02:31:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:22,129 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1355 transitions. [2021-10-11 02:31:22,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1355 transitions. [2021-10-11 02:31:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-11 02:31:22,133 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:22,133 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 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 02:31:22,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:31:22,134 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2113821860, now seen corresponding path program 1 times [2021-10-11 02:31:22,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:22,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249956236] [2021-10-11 02:31:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-10-11 02:31:22,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249956236] [2021-10-11 02:31:22,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:22,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:22,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002505037] [2021-10-11 02:31:22,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:22,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:22,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:22,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:22,291 INFO L87 Difference]: Start difference. First operand 1068 states and 1355 transitions. Second operand 4 states. [2021-10-11 02:31:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:22,950 INFO L93 Difference]: Finished difference Result 2206 states and 2791 transitions. [2021-10-11 02:31:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:22,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2021-10-11 02:31:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:22,960 INFO L225 Difference]: With dead ends: 2206 [2021-10-11 02:31:22,960 INFO L226 Difference]: Without dead ends: 1139 [2021-10-11 02:31:22,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-11 02:31:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-10-11 02:31:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:31:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1424 transitions. [2021-10-11 02:31:23,000 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1424 transitions. Word has length 154 [2021-10-11 02:31:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:23,001 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1424 transitions. [2021-10-11 02:31:23,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1424 transitions. [2021-10-11 02:31:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-11 02:31:23,008 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:23,009 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 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] [2021-10-11 02:31:23,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:31:23,009 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1461367447, now seen corresponding path program 1 times [2021-10-11 02:31:23,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:23,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827370109] [2021-10-11 02:31:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 02:31:23,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827370109] [2021-10-11 02:31:23,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:23,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:23,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466229819] [2021-10-11 02:31:23,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:23,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:23,205 INFO L87 Difference]: Start difference. First operand 1139 states and 1424 transitions. Second operand 3 states. [2021-10-11 02:31:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:23,691 INFO L93 Difference]: Finished difference Result 2703 states and 3412 transitions. [2021-10-11 02:31:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:23,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2021-10-11 02:31:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:23,702 INFO L225 Difference]: With dead ends: 2703 [2021-10-11 02:31:23,702 INFO L226 Difference]: Without dead ends: 1565 [2021-10-11 02:31:23,704 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 02:31:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-10-11 02:31:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1352. [2021-10-11 02:31:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2021-10-11 02:31:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1696 transitions. [2021-10-11 02:31:23,748 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1696 transitions. Word has length 171 [2021-10-11 02:31:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:23,750 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1696 transitions. [2021-10-11 02:31:23,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1696 transitions. [2021-10-11 02:31:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-11 02:31:23,754 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:23,754 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-11 02:31:23,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:31:23,755 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1229741162, now seen corresponding path program 1 times [2021-10-11 02:31:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:23,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292923664] [2021-10-11 02:31:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:24,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292923664] [2021-10-11 02:31:24,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146636263] [2021-10-11 02:31:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/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 02:31:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:24,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:31:24,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-11 02:31:24,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-11 02:31:25,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:31:25,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-10-11 02:31:25,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68882459] [2021-10-11 02:31:25,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:25,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:25,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:25,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:31:25,155 INFO L87 Difference]: Start difference. First operand 1352 states and 1696 transitions. Second operand 3 states. [2021-10-11 02:31:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:25,630 INFO L93 Difference]: Finished difference Result 2703 states and 3391 transitions. [2021-10-11 02:31:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:25,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2021-10-11 02:31:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:25,639 INFO L225 Difference]: With dead ends: 2703 [2021-10-11 02:31:25,639 INFO L226 Difference]: Without dead ends: 1352 [2021-10-11 02:31:25,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:31:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-11 02:31:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2021-10-11 02:31:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:31:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1443 transitions. [2021-10-11 02:31:25,679 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1443 transitions. Word has length 175 [2021-10-11 02:31:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:25,679 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1443 transitions. [2021-10-11 02:31:25,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1443 transitions. [2021-10-11 02:31:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-11 02:31:25,684 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:25,685 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 4, 4, 3, 3, 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] [2021-10-11 02:31:25,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-11 02:31:25,911 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1337019199, now seen corresponding path program 1 times [2021-10-11 02:31:25,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:25,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823792433] [2021-10-11 02:31:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-11 02:31:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823792433] [2021-10-11 02:31:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715413625] [2021-10-11 02:31:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/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 02:31:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:26,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:31:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-11 02:31:26,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-11 02:31:27,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:31:27,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:31:27,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148308256] [2021-10-11 02:31:27,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:27,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:31:27,114 INFO L87 Difference]: Start difference. First operand 1210 states and 1443 transitions. Second operand 3 states. [2021-10-11 02:31:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,600 INFO L93 Difference]: Finished difference Result 2630 states and 3115 transitions. [2021-10-11 02:31:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:27,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2021-10-11 02:31:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,602 INFO L225 Difference]: With dead ends: 2630 [2021-10-11 02:31:27,602 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:31:27,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 483 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:31:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:31:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:31:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:31:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:31:27,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 242 [2021-10-11 02:31:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,607 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:31:27,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:31:27,607 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:31:27,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:31:27,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:31:28,072 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-10-11 02:31:28,222 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-10-11 02:31:28,225 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:31:28,225 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:31:28,226 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:31:28,227 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:31:28,227 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:31:28,227 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:31:28,227 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:31:28,227 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:31:28,227 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:31:28,228 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:31:28,228 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:31:28,228 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:31:28,228 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:31:28,228 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:31:28,228 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:31:28,229 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:31:28,231 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:31:28,232 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:31:28,232 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:31:28,232 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:31:28,232 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:31:28,232 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:31:28,234 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse5 (<= ~a16~0 5)) (.cse3 (<= ~a17~0 0)) (.cse6 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse0 (= ~a20~0 1)) (.cse1 (= ~a17~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse2) (and .cse4 .cse3 .cse0) (and .cse5 .cse1 .cse2) (and .cse5 .cse3) (and .cse3 .cse6) (and (not (= ~a7~0 1)) .cse6 .cse1) (and .cse4 .cse0 .cse1))) [2021-10-11 02:31:28,234 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:31:28,235 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L524-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:31:28,236 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse5 (<= ~a16~0 5)) (.cse3 (<= ~a17~0 0)) (.cse6 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse0 (= ~a20~0 1)) (.cse1 (= ~a17~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse2) (and .cse4 .cse3 .cse0) (and .cse5 .cse1 .cse2) (and .cse5 .cse3) (and .cse3 .cse6) (and (not (= ~a7~0 1)) .cse6 .cse1) (and .cse4 .cse0 .cse1))) [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L527-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 528) no Hoare annotation was computed. [2021-10-11 02:31:28,237 INFO L262 CegarLoopResult]: For program point L528(line 528) no Hoare annotation was computed. [2021-10-11 02:31:28,238 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:31:28,238 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:31:28,238 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:31:28,238 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:31:28,238 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:31:28,238 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:31:28,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:28 BoogieIcfgContainer [2021-10-11 02:31:28,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:28,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:28,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:28,276 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:28,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:15" (3/4) ... [2021-10-11 02:31:28,279 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:31:28,305 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2021-10-11 02:31:28,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:31:28,309 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-11 02:31:28,310 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:31:28,480 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f8b5ee-222c-4c00-b648-eb02394ff428/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:28,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:28,482 INFO L168 Benchmark]: Toolchain (without parser) took 17001.08 ms. Allocated memory was 134.2 MB in the beginning and 375.4 MB in the end (delta: 241.2 MB). Free memory was 104.8 MB in the beginning and 202.9 MB in the end (delta: -98.1 MB). Peak memory consumption was 142.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,482 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 134.2 MB. Free memory is still 89.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:28,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.82 ms. Allocated memory is still 134.2 MB. Free memory was 104.8 MB in the beginning and 89.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,483 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.44 ms. Allocated memory is still 134.2 MB. Free memory was 89.5 MB in the beginning and 84.2 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,484 INFO L168 Benchmark]: Boogie Preprocessor took 55.07 ms. Allocated memory is still 134.2 MB. Free memory was 84.2 MB in the beginning and 79.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,484 INFO L168 Benchmark]: RCFGBuilder took 3024.59 ms. Allocated memory was 134.2 MB in the beginning and 167.8 MB in the end (delta: 33.6 MB). Free memory was 79.5 MB in the beginning and 80.5 MB in the end (delta: -965.1 kB). Peak memory consumption was 72.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,485 INFO L168 Benchmark]: TraceAbstraction took 12946.85 ms. Allocated memory was 167.8 MB in the beginning and 375.4 MB in the end (delta: 207.6 MB). Free memory was 79.4 MB in the beginning and 217.6 MB in the end (delta: -138.1 MB). Peak memory consumption was 69.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,485 INFO L168 Benchmark]: Witness Printer took 204.85 ms. Allocated memory is still 375.4 MB. Free memory was 217.6 MB in the beginning and 202.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 134.2 MB. Free memory is still 89.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 685.82 ms. Allocated memory is still 134.2 MB. Free memory was 104.8 MB in the beginning and 89.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.44 ms. Allocated memory is still 134.2 MB. Free memory was 89.5 MB in the beginning and 84.2 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.07 ms. Allocated memory is still 134.2 MB. Free memory was 84.2 MB in the beginning and 79.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3024.59 ms. Allocated memory was 134.2 MB in the beginning and 167.8 MB in the end (delta: 33.6 MB). Free memory was 79.5 MB in the beginning and 80.5 MB in the end (delta: -965.1 kB). Peak memory consumption was 72.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12946.85 ms. Allocated memory was 167.8 MB in the beginning and 375.4 MB in the end (delta: 207.6 MB). Free memory was 79.4 MB in the beginning and 217.6 MB in the end (delta: -138.1 MB). Peak memory consumption was 69.5 MB. Max. memory is 16.1 GB. * Witness Printer took 204.85 ms. Allocated memory is still 375.4 MB. Free memory was 217.6 MB in the beginning and 202.9 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: 528]: 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: 40]: Loop Invariant Derived loop invariant: ((((((((a20 == 1 && a17 == 1) && a8 <= 13) || ((a17 <= 0 && a20 == 1) && a8 <= 13)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || (a16 <= 5 && a17 <= 0)) || (a17 <= 0 && 15 <= a8)) || ((!(a7 == 1) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a20 == 1) && a17 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((a20 == 1 && a17 == 1) && a8 <= 13) || ((a17 <= 0 && a20 == 1) && a8 <= 13)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || (a16 <= 5 && a17 <= 0)) || (a17 <= 0 && 15 <= a8)) || ((!(a7 == 1) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a20 == 1) && a17 == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.4s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 509 SDtfs, 867 SDslu, 55 SDs, 0 SdLazy, 2807 SolverSat, 667 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 865 GetRequests, 842 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1352occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 852 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 49 NumberOfFragments, 153 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2682 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1986 NumberOfCodeBlocks, 1986 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2387 ConstructedInterpolants, 0 QuantifiedInterpolants, 1419284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 906 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 2058/2262 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...