./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label27.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_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/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_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/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_1911ce5a-44f7-4984-a109-48a23ad3f475/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 dcb309f6feccb6bb3140aa826f6766a325e42843 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:27:27,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:27,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:28,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:28,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:28,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:28,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:28,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:28,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:28,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:28,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:28,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:28,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:28,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:28,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:28,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:28,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:28,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:28,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:28,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:28,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:28,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:28,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:28,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:28,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:28,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:28,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:28,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:28,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:28,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:28,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:28,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:28,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:28,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:28,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:28,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:28,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:28,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:28,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:28,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:28,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:28,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:27:28,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:28,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:28,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:28,101 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:28,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:28,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:28,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:28,102 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:28,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:28,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:28,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:28,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:28,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:28,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:28,104 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:28,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:28,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:28,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:28,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:28,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:28,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:28,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:28,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:28,107 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:27:28,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:28,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:28,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:28,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:28,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:28,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:28,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:28,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:28,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:28,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:28,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:28,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:28,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:28,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:28,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:28,111 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_1911ce5a-44f7-4984-a109-48a23ad3f475/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcb309f6feccb6bb3140aa826f6766a325e42843 [2021-10-11 02:27:28,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:28,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:28,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:28,388 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:28,389 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:28,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label27.c [2021-10-11 02:27:28,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/data/e71312d4f/ac63f02d4f1943ddada1ccf7a7ead2ca/FLAG887da5aec [2021-10-11 02:27:29,065 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:29,065 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/sv-benchmarks/c/eca-rers2012/Problem01_label27.c [2021-10-11 02:27:29,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/data/e71312d4f/ac63f02d4f1943ddada1ccf7a7ead2ca/FLAG887da5aec [2021-10-11 02:27:29,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/data/e71312d4f/ac63f02d4f1943ddada1ccf7a7ead2ca [2021-10-11 02:27:29,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:29,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:29,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:29,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:29,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:29,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:29,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477a7da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29, skipping insertion in model container [2021-10-11 02:27:29,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:29,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:29,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:29,725 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_1911ce5a-44f7-4984-a109-48a23ad3f475/sv-benchmarks/c/eca-rers2012/Problem01_label27.c[16500,16513] [2021-10-11 02:27:29,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:29,804 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:29,881 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_1911ce5a-44f7-4984-a109-48a23ad3f475/sv-benchmarks/c/eca-rers2012/Problem01_label27.c[16500,16513] [2021-10-11 02:27:29,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:29,915 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:29,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29 WrapperNode [2021-10-11 02:27:29,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:29,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:29,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:29,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:29,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:29,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:30,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:30,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:30,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:30,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... [2021-10-11 02:27:30,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:30,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:30,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:30,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:30,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/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 02:27:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:27:30,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:30,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:30,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:32,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:32,152 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:27:32,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:32 BoogieIcfgContainer [2021-10-11 02:27:32,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:32,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:32,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:32,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:32,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:29" (1/3) ... [2021-10-11 02:27:32,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d4dc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:32, skipping insertion in model container [2021-10-11 02:27:32,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:29" (2/3) ... [2021-10-11 02:27:32,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d4dc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:32, skipping insertion in model container [2021-10-11 02:27:32,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:32" (3/3) ... [2021-10-11 02:27:32,169 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label27.c [2021-10-11 02:27:32,183 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:32,187 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:27:32,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:27:32,233 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:32,233 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:32,233 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:32,233 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:32,238 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:32,238 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:32,238 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:32,238 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:27:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:27:32,274 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:32,274 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 02:27:32,275 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:32,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1806915160, now seen corresponding path program 1 times [2021-10-11 02:27:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:32,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320838395] [2021-10-11 02:27:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:32,702 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 02:27:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320838395] [2021-10-11 02:27:32,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:32,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:32,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447336187] [2021-10-11 02:27:32,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:32,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:32,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:32,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:32,726 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:27:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:33,246 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:27:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:33,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:27:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:33,260 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:27:33,260 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:27:33,263 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 02:27:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:27:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:27:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:27:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-11 02:27:33,316 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-11 02:27:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:33,317 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-11 02:27:33,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-11 02:27:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-11 02:27:33,320 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:33,320 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2021-10-11 02:27:33,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:33,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1694593086, now seen corresponding path program 1 times [2021-10-11 02:27:33,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:33,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406816663] [2021-10-11 02:27:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:33,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406816663] [2021-10-11 02:27:33,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:33,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:33,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716026431] [2021-10-11 02:27:33,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:33,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:33,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:33,410 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2021-10-11 02:27:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:33,785 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-11 02:27:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:33,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2021-10-11 02:27:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:33,788 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:27:33,789 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:27:33,790 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 02:27:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:27:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:27:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:27:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 479 transitions. [2021-10-11 02:27:33,811 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 479 transitions. Word has length 76 [2021-10-11 02:27:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:33,812 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 479 transitions. [2021-10-11 02:27:33,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 479 transitions. [2021-10-11 02:27:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-11 02:27:33,817 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:33,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:33,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:33,817 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -202240063, now seen corresponding path program 1 times [2021-10-11 02:27:33,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:33,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285511338] [2021-10-11 02:27:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:27:33,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285511338] [2021-10-11 02:27:33,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:33,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304474447] [2021-10-11 02:27:33,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:33,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:33,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:33,942 INFO L87 Difference]: Start difference. First operand 287 states and 479 transitions. Second operand 3 states. [2021-10-11 02:27:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:34,302 INFO L93 Difference]: Finished difference Result 857 states and 1434 transitions. [2021-10-11 02:27:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:34,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2021-10-11 02:27:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:34,307 INFO L225 Difference]: With dead ends: 857 [2021-10-11 02:27:34,307 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:27:34,309 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 02:27:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:27:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:27:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:27:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2021-10-11 02:27:34,342 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 86 [2021-10-11 02:27:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:34,343 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2021-10-11 02:27:34,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2021-10-11 02:27:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-11 02:27:34,351 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:34,351 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:34,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:27:34,352 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash 289047179, now seen corresponding path program 1 times [2021-10-11 02:27:34,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:34,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520093653] [2021-10-11 02:27:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:27:34,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520093653] [2021-10-11 02:27:34,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:34,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:34,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033268617] [2021-10-11 02:27:34,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:34,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:34,416 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 3 states. [2021-10-11 02:27:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:34,787 INFO L93 Difference]: Finished difference Result 1567 states and 2441 transitions. [2021-10-11 02:27:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:34,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2021-10-11 02:27:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:34,792 INFO L225 Difference]: With dead ends: 1567 [2021-10-11 02:27:34,793 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:27:34,794 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 02:27:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:27:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 642. [2021-10-11 02:27:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2021-10-11 02:27:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-11 02:27:34,826 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 91 [2021-10-11 02:27:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:34,826 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-11 02:27:34,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-11 02:27:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-11 02:27:34,830 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:34,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:34,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:27:34,831 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1324169363, now seen corresponding path program 1 times [2021-10-11 02:27:34,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:34,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611146878] [2021-10-11 02:27:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:34,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611146878] [2021-10-11 02:27:34,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:34,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:34,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741467174] [2021-10-11 02:27:34,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:34,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:34,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:34,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:34,899 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand 3 states. [2021-10-11 02:27:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:35,327 INFO L93 Difference]: Finished difference Result 1922 states and 2844 transitions. [2021-10-11 02:27:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:35,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2021-10-11 02:27:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:35,335 INFO L225 Difference]: With dead ends: 1922 [2021-10-11 02:27:35,336 INFO L226 Difference]: Without dead ends: 1281 [2021-10-11 02:27:35,337 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 02:27:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-10-11 02:27:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2021-10-11 02:27:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:27:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1608 transitions. [2021-10-11 02:27:35,379 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1608 transitions. Word has length 94 [2021-10-11 02:27:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:35,381 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1608 transitions. [2021-10-11 02:27:35,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1608 transitions. [2021-10-11 02:27:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-11 02:27:35,385 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:35,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:35,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:27:35,386 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash -720013175, now seen corresponding path program 1 times [2021-10-11 02:27:35,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:35,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446748111] [2021-10-11 02:27:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:27:35,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446748111] [2021-10-11 02:27:35,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:35,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831953709] [2021-10-11 02:27:35,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:35,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:35,506 INFO L87 Difference]: Start difference. First operand 1139 states and 1608 transitions. Second operand 3 states. [2021-10-11 02:27:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:35,891 INFO L93 Difference]: Finished difference Result 2419 states and 3375 transitions. [2021-10-11 02:27:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:35,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2021-10-11 02:27:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:35,901 INFO L225 Difference]: With dead ends: 2419 [2021-10-11 02:27:35,901 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:27:35,904 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 02:27:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:27:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2021-10-11 02:27:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:27:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1473 transitions. [2021-10-11 02:27:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1473 transitions. Word has length 98 [2021-10-11 02:27:35,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:35,943 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1473 transitions. [2021-10-11 02:27:35,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1473 transitions. [2021-10-11 02:27:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-11 02:27:35,949 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:35,950 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:35,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:27:35,950 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1815697455, now seen corresponding path program 1 times [2021-10-11 02:27:35,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:35,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103996281] [2021-10-11 02:27:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-11 02:27:36,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103996281] [2021-10-11 02:27:36,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:36,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:36,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58344633] [2021-10-11 02:27:36,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:36,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:36,030 INFO L87 Difference]: Start difference. First operand 1210 states and 1473 transitions. Second operand 3 states. [2021-10-11 02:27:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:36,313 INFO L93 Difference]: Finished difference Result 2348 states and 2867 transitions. [2021-10-11 02:27:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:36,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2021-10-11 02:27:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:36,320 INFO L225 Difference]: With dead ends: 2348 [2021-10-11 02:27:36,320 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:27:36,322 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 02:27:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:27:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2021-10-11 02:27:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:27:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1353 transitions. [2021-10-11 02:27:36,352 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1353 transitions. Word has length 102 [2021-10-11 02:27:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:36,352 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1353 transitions. [2021-10-11 02:27:36,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1353 transitions. [2021-10-11 02:27:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-11 02:27:36,356 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:36,356 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:36,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:27:36,357 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash -785770443, now seen corresponding path program 1 times [2021-10-11 02:27:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:36,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603657314] [2021-10-11 02:27:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:27:36,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603657314] [2021-10-11 02:27:36,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:36,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:36,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121502955] [2021-10-11 02:27:36,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:36,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:36,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:36,402 INFO L87 Difference]: Start difference. First operand 1139 states and 1353 transitions. Second operand 3 states. [2021-10-11 02:27:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:36,744 INFO L93 Difference]: Finished difference Result 2703 states and 3256 transitions. [2021-10-11 02:27:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:36,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2021-10-11 02:27:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:36,755 INFO L225 Difference]: With dead ends: 2703 [2021-10-11 02:27:36,755 INFO L226 Difference]: Without dead ends: 1636 [2021-10-11 02:27:36,757 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 02:27:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-11 02:27:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1423. [2021-10-11 02:27:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2021-10-11 02:27:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1727 transitions. [2021-10-11 02:27:36,797 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1727 transitions. Word has length 111 [2021-10-11 02:27:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:36,797 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1727 transitions. [2021-10-11 02:27:36,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1727 transitions. [2021-10-11 02:27:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-11 02:27:36,801 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:36,801 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-11 02:27:36,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:27:36,801 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:36,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1033354769, now seen corresponding path program 1 times [2021-10-11 02:27:36,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:36,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321531972] [2021-10-11 02:27:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:27:36,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321531972] [2021-10-11 02:27:36,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:36,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:36,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382507157] [2021-10-11 02:27:36,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:36,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:36,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:36,865 INFO L87 Difference]: Start difference. First operand 1423 states and 1727 transitions. Second operand 3 states. [2021-10-11 02:27:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:37,130 INFO L93 Difference]: Finished difference Result 2987 states and 3629 transitions. [2021-10-11 02:27:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:37,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2021-10-11 02:27:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:37,139 INFO L225 Difference]: With dead ends: 2987 [2021-10-11 02:27:37,139 INFO L226 Difference]: Without dead ends: 1565 [2021-10-11 02:27:37,142 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 02:27:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-10-11 02:27:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-10-11 02:27:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2021-10-11 02:27:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1883 transitions. [2021-10-11 02:27:37,206 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1883 transitions. Word has length 127 [2021-10-11 02:27:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:37,206 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1883 transitions. [2021-10-11 02:27:37,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1883 transitions. [2021-10-11 02:27:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-11 02:27:37,210 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:37,210 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 02:27:37,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:27:37,211 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:37,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1365882791, now seen corresponding path program 1 times [2021-10-11 02:27:37,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:37,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614636123] [2021-10-11 02:27:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:27:37,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614636123] [2021-10-11 02:27:37,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:37,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:37,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35369325] [2021-10-11 02:27:37,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:37,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:37,292 INFO L87 Difference]: Start difference. First operand 1565 states and 1883 transitions. Second operand 4 states. [2021-10-11 02:27:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:37,714 INFO L93 Difference]: Finished difference Result 3129 states and 3777 transitions. [2021-10-11 02:27:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:37,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2021-10-11 02:27:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:37,723 INFO L225 Difference]: With dead ends: 3129 [2021-10-11 02:27:37,723 INFO L226 Difference]: Without dead ends: 1636 [2021-10-11 02:27:37,725 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 02:27:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-11 02:27:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1565. [2021-10-11 02:27:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2021-10-11 02:27:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1863 transitions. [2021-10-11 02:27:37,764 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1863 transitions. Word has length 131 [2021-10-11 02:27:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:37,765 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1863 transitions. [2021-10-11 02:27:37,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1863 transitions. [2021-10-11 02:27:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-11 02:27:37,769 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:37,770 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 02:27:37,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:27:37,770 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1083768702, now seen corresponding path program 1 times [2021-10-11 02:27:37,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:37,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231105322] [2021-10-11 02:27:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:27:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231105322] [2021-10-11 02:27:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987524442] [2021-10-11 02:27:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/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 02:27:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:27:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-11 02:27:38,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-11 02:27:38,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:27:38,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:27:38,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024429561] [2021-10-11 02:27:38,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:38,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:38,449 INFO L87 Difference]: Start difference. First operand 1565 states and 1863 transitions. Second operand 3 states. [2021-10-11 02:27:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:38,778 INFO L93 Difference]: Finished difference Result 3129 states and 3737 transitions. [2021-10-11 02:27:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:38,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2021-10-11 02:27:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:38,788 INFO L225 Difference]: With dead ends: 3129 [2021-10-11 02:27:38,788 INFO L226 Difference]: Without dead ends: 1636 [2021-10-11 02:27:38,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-11 02:27:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-11 02:27:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:27:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1887 transitions. [2021-10-11 02:27:38,828 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1887 transitions. Word has length 148 [2021-10-11 02:27:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:38,829 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1887 transitions. [2021-10-11 02:27:38,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1887 transitions. [2021-10-11 02:27:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-11 02:27:38,833 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:38,834 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, 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] [2021-10-11 02:27:39,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-11 02:27:39,050 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1216279002, now seen corresponding path program 1 times [2021-10-11 02:27:39,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:39,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391594767] [2021-10-11 02:27:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:27:39,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391594767] [2021-10-11 02:27:39,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:39,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:39,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465693745] [2021-10-11 02:27:39,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:39,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:39,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:39,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:39,175 INFO L87 Difference]: Start difference. First operand 1636 states and 1887 transitions. Second operand 4 states. [2021-10-11 02:27:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:39,671 INFO L93 Difference]: Finished difference Result 3413 states and 3939 transitions. [2021-10-11 02:27:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:39,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2021-10-11 02:27:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:39,680 INFO L225 Difference]: With dead ends: 3413 [2021-10-11 02:27:39,680 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:27:39,682 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 02:27:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:27:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1565. [2021-10-11 02:27:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2021-10-11 02:27:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1774 transitions. [2021-10-11 02:27:39,747 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1774 transitions. Word has length 151 [2021-10-11 02:27:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:39,747 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1774 transitions. [2021-10-11 02:27:39,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1774 transitions. [2021-10-11 02:27:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-10-11 02:27:39,751 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:39,752 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-10-11 02:27:39,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-11 02:27:39,752 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:39,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2109679940, now seen corresponding path program 1 times [2021-10-11 02:27:39,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:39,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138354861] [2021-10-11 02:27:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-11 02:27:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138354861] [2021-10-11 02:27:39,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:39,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:39,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809394636] [2021-10-11 02:27:39,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:39,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:39,904 INFO L87 Difference]: Start difference. First operand 1565 states and 1774 transitions. Second operand 3 states. [2021-10-11 02:27:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:40,213 INFO L93 Difference]: Finished difference Result 3200 states and 3632 transitions. [2021-10-11 02:27:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:40,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2021-10-11 02:27:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:40,222 INFO L225 Difference]: With dead ends: 3200 [2021-10-11 02:27:40,222 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:27:40,225 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 02:27:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:27:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2021-10-11 02:27:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:27:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1807 transitions. [2021-10-11 02:27:40,260 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1807 transitions. Word has length 194 [2021-10-11 02:27:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:40,260 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1807 transitions. [2021-10-11 02:27:40,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1807 transitions. [2021-10-11 02:27:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-10-11 02:27:40,265 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:40,265 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:40,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 02:27:40,266 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:40,266 INFO L82 PathProgramCache]: Analyzing trace with hash 236740685, now seen corresponding path program 1 times [2021-10-11 02:27:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:40,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471470541] [2021-10-11 02:27:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-11 02:27:40,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471470541] [2021-10-11 02:27:40,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996318179] [2021-10-11 02:27:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/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 02:27:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:27:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:27:41,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:27:41,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:27:41,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:27:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065008574] [2021-10-11 02:27:41,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:41,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:41,248 INFO L87 Difference]: Start difference. First operand 1636 states and 1807 transitions. Second operand 3 states. [2021-10-11 02:27:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:41,550 INFO L93 Difference]: Finished difference Result 3626 states and 4027 transitions. [2021-10-11 02:27:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:41,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2021-10-11 02:27:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:41,559 INFO L225 Difference]: With dead ends: 3626 [2021-10-11 02:27:41,559 INFO L226 Difference]: Without dead ends: 1636 [2021-10-11 02:27:41,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-11 02:27:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-11 02:27:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:27:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1788 transitions. [2021-10-11 02:27:41,598 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1788 transitions. Word has length 216 [2021-10-11 02:27:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:41,599 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1788 transitions. [2021-10-11 02:27:41,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1788 transitions. [2021-10-11 02:27:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-10-11 02:27:41,637 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:41,638 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-11 02:27:41,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 02:27:41,838 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:41,839 INFO L82 PathProgramCache]: Analyzing trace with hash -706791699, now seen corresponding path program 1 times [2021-10-11 02:27:41,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:41,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620040370] [2021-10-11 02:27:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-11 02:27:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620040370] [2021-10-11 02:27:42,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:42,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:42,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715074810] [2021-10-11 02:27:42,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:42,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:42,042 INFO L87 Difference]: Start difference. First operand 1636 states and 1788 transitions. Second operand 3 states. [2021-10-11 02:27:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:42,283 INFO L93 Difference]: Finished difference Result 2701 states and 2967 transitions. [2021-10-11 02:27:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:42,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2021-10-11 02:27:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:42,284 INFO L225 Difference]: With dead ends: 2701 [2021-10-11 02:27:42,285 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:27:42,288 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 02:27:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:27:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:27:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:27:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:27:42,289 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 245 [2021-10-11 02:27:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:42,289 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:27:42,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:27:42,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:27:42,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-11 02:27:42,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:27:42,548 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-10-11 02:27:42,704 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-10-11 02:27:42,707 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:27:42,707 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:27:42,707 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:27:42,708 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L446-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:27:42,709 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L449-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L450(line 450) no Hoare annotation was computed. [2021-10-11 02:27:42,710 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (= ~a16~0 6)) (.cse7 (<= ~a8~0 13)) (.cse2 (<= ~a7~0 0)) (.cse5 (= ~a20~0 1)) (.cse4 (<= ~a8~0 14)) (.cse0 (= ~a21~0 1)) (.cse6 (= ~a7~0 1)) (.cse8 (<= ~a16~0 5)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse5) (and .cse6 .cse5 .cse7 (= ~a17~0 1)) (and .cse0 .cse8 .cse2 .cse3) (and .cse6 (or (and .cse1 .cse7) (and (<= ~a16~0 4) .cse7))) (and .cse0 .cse2 .cse5) (and .cse4 .cse0 .cse8 .cse3) (and .cse0 .cse6 .cse8 .cse3))) [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:27:42,711 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (= ~a16~0 6)) (.cse7 (<= ~a8~0 13)) (.cse2 (<= ~a7~0 0)) (.cse5 (= ~a20~0 1)) (.cse4 (<= ~a8~0 14)) (.cse0 (= ~a21~0 1)) (.cse6 (= ~a7~0 1)) (.cse8 (<= ~a16~0 5)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse5) (and .cse6 .cse5 .cse7 (= ~a17~0 1)) (and .cse0 .cse8 .cse2 .cse3) (and .cse6 (or (and .cse1 .cse7) (and (<= ~a16~0 4) .cse7))) (and .cse0 .cse2 .cse5) (and .cse4 .cse0 .cse8 .cse3) (and .cse0 .cse6 .cse8 .cse3))) [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 450) no Hoare annotation was computed. [2021-10-11 02:27:42,712 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:27:42,713 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:27:42,713 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:27:42,713 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:27:42,713 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:27:42,713 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:27:42,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:42 BoogieIcfgContainer [2021-10-11 02:27:42,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:42,735 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:42,735 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:42,736 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:42,736 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:32" (3/4) ... [2021-10-11 02:27:42,739 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:27:42,762 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2021-10-11 02:27:42,764 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:27:42,766 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 02:27:42,767 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:27:42,923 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1911ce5a-44f7-4984-a109-48a23ad3f475/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:42,923 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:42,924 INFO L168 Benchmark]: Toolchain (without parser) took 13608.02 ms. Allocated memory was 96.5 MB in the beginning and 436.2 MB in the end (delta: 339.7 MB). Free memory was 63.8 MB in the beginning and 156.2 MB in the end (delta: -92.4 MB). Peak memory consumption was 247.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,925 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 96.5 MB. Free memory was 50.8 MB in the beginning and 50.7 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:42,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.62 ms. Allocated memory is still 96.5 MB. Free memory was 63.8 MB in the beginning and 56.4 MB in the end (delta: 7.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 105.82 ms. Allocated memory is still 96.5 MB. Free memory was 56.4 MB in the beginning and 50.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,926 INFO L168 Benchmark]: Boogie Preprocessor took 138.84 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 50.5 MB in the beginning and 91.0 MB in the end (delta: -40.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,927 INFO L168 Benchmark]: RCFGBuilder took 1993.76 ms. Allocated memory is still 117.4 MB. Free memory was 91.0 MB in the beginning and 39.1 MB in the end (delta: 51.9 MB). Peak memory consumption was 64.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,928 INFO L168 Benchmark]: TraceAbstraction took 10575.01 ms. Allocated memory was 117.4 MB in the beginning and 436.2 MB in the end (delta: 318.8 MB). Free memory was 38.1 MB in the beginning and 171.9 MB in the end (delta: -133.9 MB). Peak memory consumption was 183.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,929 INFO L168 Benchmark]: Witness Printer took 187.98 ms. Allocated memory is still 436.2 MB. Free memory was 171.9 MB in the beginning and 156.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:42,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 96.5 MB. Free memory was 50.8 MB in the beginning and 50.7 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 598.62 ms. Allocated memory is still 96.5 MB. Free memory was 63.8 MB in the beginning and 56.4 MB in the end (delta: 7.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 105.82 ms. Allocated memory is still 96.5 MB. Free memory was 56.4 MB in the beginning and 50.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 138.84 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 50.5 MB in the beginning and 91.0 MB in the end (delta: -40.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1993.76 ms. Allocated memory is still 117.4 MB. Free memory was 91.0 MB in the beginning and 39.1 MB in the end (delta: 51.9 MB). Peak memory consumption was 64.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10575.01 ms. Allocated memory was 117.4 MB in the beginning and 436.2 MB in the end (delta: 318.8 MB). Free memory was 38.1 MB in the beginning and 171.9 MB in the end (delta: -133.9 MB). Peak memory consumption was 183.8 MB. Max. memory is 16.1 GB. * Witness Printer took 187.98 ms. Allocated memory is still 436.2 MB. Free memory was 171.9 MB in the beginning and 156.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 450]: 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: (((((((((a21 == 1 && a16 == 6) && a7 <= 0) && a20 <= 0) || ((a8 <= 14 && a21 == 1) && a20 == 1)) || (((a7 == 1 && a20 == 1) && a8 <= 13) && a17 == 1)) || (((a21 == 1 && a16 <= 5) && a7 <= 0) && a20 <= 0)) || (a7 == 1 && ((a16 == 6 && a8 <= 13) || (a16 <= 4 && a8 <= 13)))) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((a21 == 1 && a16 == 6) && a7 <= 0) && a20 <= 0) || ((a8 <= 14 && a21 == 1) && a20 == 1)) || (((a7 == 1 && a20 == 1) && a8 <= 13) && a17 == 1)) || (((a21 == 1 && a16 <= 5) && a7 <= 0) && a20 <= 0)) || (a7 == 1 && ((a16 == 6 && a8 <= 13) || (a16 <= 4 && a8 <= 13)))) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.0s, OverallIterations: 15, TraceHistogramMax: 7, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 943 SDtfs, 1051 SDslu, 63 SDs, 0 SdLazy, 3107 SolverSat, 700 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 766 GetRequests, 742 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1636occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 1065 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 59 NumberOfFragments, 211 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2064 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 178 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 2305 NumberOfCodeBlocks, 2305 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2650 ConstructedInterpolants, 0 QuantifiedInterpolants, 1190257 SizeOfPredicates, 0 NumberOfNonLiveVariables, 807 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 19 InterpolantComputations, 17 PerfectInterpolantSequences, 2311/2408 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...