./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label46.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-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c -s /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan --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 e24e8d0d826390a3e8204259c4169e780de54704 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:55:13,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:55:13,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:55:13,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:55:13,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:55:13,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:55:13,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:55:13,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:55:13,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:55:13,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:55:13,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:55:13,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:55:13,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:55:13,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:55:13,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:55:13,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:55:13,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:55:13,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:55:13,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:55:13,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:55:13,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:55:13,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:55:13,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:55:13,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:55:13,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:55:13,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:55:13,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:55:13,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:55:13,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:55:13,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:55:13,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:55:13,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:55:13,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:55:13,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:55:13,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:55:13,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:55:13,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:55:13,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:55:13,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:55:13,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:55:13,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:55:13,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:55:13,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:55:13,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:55:13,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:55:13,272 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:55:13,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:55:13,272 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:55:13,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:55:13,273 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:55:13,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:55:13,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:55:13,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:55:13,273 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:55:13,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:55:13,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:55:13,281 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:55:13,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:55:13,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:55:13,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:55:13,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:55:13,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:55:13,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:55:13,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:55:13,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:55:13,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:55:13,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:55:13,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:55:13,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:55:13,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:55:13,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:55:13,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:55:13,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:55:13,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:55:13,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:55:13,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:55:13,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:55:13,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:55:13,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:55:13,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:55:13,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:55:13,286 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-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e24e8d0d826390a3e8204259c4169e780de54704 [2020-12-09 10:55:13,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:55:13,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:55:13,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:55:13,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:55:13,491 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:55:13,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2020-12-09 10:55:13,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/data/f0c610bcb/d2516f4d4a6245b89d3721fdb310c1a8/FLAGc412fbc88 [2020-12-09 10:55:14,053 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:55:14,053 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2020-12-09 10:55:14,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/data/f0c610bcb/d2516f4d4a6245b89d3721fdb310c1a8/FLAGc412fbc88 [2020-12-09 10:55:14,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/data/f0c610bcb/d2516f4d4a6245b89d3721fdb310c1a8 [2020-12-09 10:55:14,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:55:14,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:55:14,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:55:14,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:55:14,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:55:14,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:55:14" (1/1) ... [2020-12-09 10:55:14,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11308a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:14, skipping insertion in model container [2020-12-09 10:55:14,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:55:14" (1/1) ... [2020-12-09 10:55:14,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:55:14,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:55:15,049 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/sv-benchmarks/c/eca-rers2012/Problem03_label46.c[59207,59220] [2020-12-09 10:55:15,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:55:15,082 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:55:15,251 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/sv-benchmarks/c/eca-rers2012/Problem03_label46.c[59207,59220] [2020-12-09 10:55:15,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:55:15,274 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:55:15,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15 WrapperNode [2020-12-09 10:55:15,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:55:15,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:55:15,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:55:15,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:55:15,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:55:15,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:55:15,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:55:15,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:55:15,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... [2020-12-09 10:55:15,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:55:15,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:55:15,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:55:15,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:55:15,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/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 [2020-12-09 10:55:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:55:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:55:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:55:15,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:55:17,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:55:17,631 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 10:55:17,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:55:17 BoogieIcfgContainer [2020-12-09 10:55:17,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:55:17,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:55:17,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:55:17,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:55:17,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:55:14" (1/3) ... [2020-12-09 10:55:17,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20226573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:55:17, skipping insertion in model container [2020-12-09 10:55:17,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:55:15" (2/3) ... [2020-12-09 10:55:17,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20226573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:55:17, skipping insertion in model container [2020-12-09 10:55:17,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:55:17" (3/3) ... [2020-12-09 10:55:17,640 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label46.c [2020-12-09 10:55:17,653 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:55:17,656 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:55:17,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:55:17,686 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:55:17,686 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:55:17,686 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:55:17,686 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:55:17,686 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:55:17,686 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:55:17,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:55:17,686 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:55:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-09 10:55:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-09 10:55:17,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:17,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:17,710 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1467448165, now seen corresponding path program 1 times [2020-12-09 10:55:17,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:17,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356405912] [2020-12-09 10:55:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:18,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356405912] [2020-12-09 10:55:18,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:18,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:55:18,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809846597] [2020-12-09 10:55:18,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:18,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:18,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:18,098 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 3 states. [2020-12-09 10:55:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:18,736 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2020-12-09 10:55:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:18,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2020-12-09 10:55:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:18,748 INFO L225 Difference]: With dead ends: 440 [2020-12-09 10:55:18,748 INFO L226 Difference]: Without dead ends: 289 [2020-12-09 10:55:18,750 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 [2020-12-09 10:55:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-09 10:55:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2020-12-09 10:55:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-09 10:55:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2020-12-09 10:55:18,803 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2020-12-09 10:55:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:18,804 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2020-12-09 10:55:18,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2020-12-09 10:55:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-09 10:55:18,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:18,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:18,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:55:18,809 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 732720957, now seen corresponding path program 1 times [2020-12-09 10:55:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:18,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490489832] [2020-12-09 10:55:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:18,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490489832] [2020-12-09 10:55:18,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:18,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:55:18,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616747757] [2020-12-09 10:55:18,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:18,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:18,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:18,919 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand 3 states. [2020-12-09 10:55:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:19,513 INFO L93 Difference]: Finished difference Result 865 states and 1558 transitions. [2020-12-09 10:55:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:19,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-09 10:55:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:19,517 INFO L225 Difference]: With dead ends: 865 [2020-12-09 10:55:19,517 INFO L226 Difference]: Without dead ends: 577 [2020-12-09 10:55:19,519 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 [2020-12-09 10:55:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-12-09 10:55:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2020-12-09 10:55:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-12-09 10:55:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 961 transitions. [2020-12-09 10:55:19,541 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 961 transitions. Word has length 148 [2020-12-09 10:55:19,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:19,542 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 961 transitions. [2020-12-09 10:55:19,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 961 transitions. [2020-12-09 10:55:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-09 10:55:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:19,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:19,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:55:19,546 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1977875142, now seen corresponding path program 1 times [2020-12-09 10:55:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:19,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775491527] [2020-12-09 10:55:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:19,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775491527] [2020-12-09 10:55:19,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:19,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:55:19,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110530424] [2020-12-09 10:55:19,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:19,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:19,615 INFO L87 Difference]: Start difference. First operand 575 states and 961 transitions. Second operand 3 states. [2020-12-09 10:55:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:20,247 INFO L93 Difference]: Finished difference Result 1721 states and 2880 transitions. [2020-12-09 10:55:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:20,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2020-12-09 10:55:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:20,254 INFO L225 Difference]: With dead ends: 1721 [2020-12-09 10:55:20,254 INFO L226 Difference]: Without dead ends: 1147 [2020-12-09 10:55:20,256 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 [2020-12-09 10:55:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-12-09 10:55:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2020-12-09 10:55:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2020-12-09 10:55:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1864 transitions. [2020-12-09 10:55:20,277 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1864 transitions. Word has length 151 [2020-12-09 10:55:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:20,277 INFO L481 AbstractCegarLoop]: Abstraction has 1147 states and 1864 transitions. [2020-12-09 10:55:20,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1864 transitions. [2020-12-09 10:55:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-09 10:55:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:20,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:20,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 10:55:20,280 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 559039713, now seen corresponding path program 1 times [2020-12-09 10:55:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:20,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683902113] [2020-12-09 10:55:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:55:20,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683902113] [2020-12-09 10:55:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:20,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469206169] [2020-12-09 10:55:20,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:20,347 INFO L87 Difference]: Start difference. First operand 1147 states and 1864 transitions. Second operand 3 states. [2020-12-09 10:55:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:21,070 INFO L93 Difference]: Finished difference Result 2865 states and 4725 transitions. [2020-12-09 10:55:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:21,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-09 10:55:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:21,078 INFO L225 Difference]: With dead ends: 2865 [2020-12-09 10:55:21,078 INFO L226 Difference]: Without dead ends: 1719 [2020-12-09 10:55:21,080 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 [2020-12-09 10:55:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2020-12-09 10:55:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2020-12-09 10:55:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1719 states. [2020-12-09 10:55:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2683 transitions. [2020-12-09 10:55:21,111 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2683 transitions. Word has length 163 [2020-12-09 10:55:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:21,112 INFO L481 AbstractCegarLoop]: Abstraction has 1719 states and 2683 transitions. [2020-12-09 10:55:21,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2683 transitions. [2020-12-09 10:55:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-09 10:55:21,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:21,115 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:21,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 10:55:21,115 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2010086685, now seen corresponding path program 1 times [2020-12-09 10:55:21,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:21,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733267958] [2020-12-09 10:55:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-09 10:55:21,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733267958] [2020-12-09 10:55:21,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:21,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020352713] [2020-12-09 10:55:21,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:21,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:21,179 INFO L87 Difference]: Start difference. First operand 1719 states and 2683 transitions. Second operand 3 states. [2020-12-09 10:55:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:21,849 INFO L93 Difference]: Finished difference Result 5153 states and 8046 transitions. [2020-12-09 10:55:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:21,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2020-12-09 10:55:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:21,862 INFO L225 Difference]: With dead ends: 5153 [2020-12-09 10:55:21,862 INFO L226 Difference]: Without dead ends: 3435 [2020-12-09 10:55:21,864 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 [2020-12-09 10:55:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-12-09 10:55:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2020-12-09 10:55:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3435 states. [2020-12-09 10:55:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4934 transitions. [2020-12-09 10:55:21,940 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4934 transitions. Word has length 167 [2020-12-09 10:55:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:21,940 INFO L481 AbstractCegarLoop]: Abstraction has 3435 states and 4934 transitions. [2020-12-09 10:55:21,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4934 transitions. [2020-12-09 10:55:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-09 10:55:21,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:21,946 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:21,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 10:55:21,946 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1010835635, now seen corresponding path program 1 times [2020-12-09 10:55:21,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:21,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007519578] [2020-12-09 10:55:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007519578] [2020-12-09 10:55:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982199301] [2020-12-09 10:55:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/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 [2020-12-09 10:55:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 10:55:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:55:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 10:55:22,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:55:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 10:55:22,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:55:22,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 10:55:22,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810181707] [2020-12-09 10:55:22,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:22,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:22,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:55:22,483 INFO L87 Difference]: Start difference. First operand 3435 states and 4934 transitions. Second operand 3 states. [2020-12-09 10:55:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:23,137 INFO L93 Difference]: Finished difference Result 10015 states and 14405 transitions. [2020-12-09 10:55:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:23,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-09 10:55:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:23,160 INFO L225 Difference]: With dead ends: 10015 [2020-12-09 10:55:23,161 INFO L226 Difference]: Without dead ends: 6581 [2020-12-09 10:55:23,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:55:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6581 states. [2020-12-09 10:55:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6581. [2020-12-09 10:55:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6581 states. [2020-12-09 10:55:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 8486 transitions. [2020-12-09 10:55:23,271 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 8486 transitions. Word has length 171 [2020-12-09 10:55:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:23,271 INFO L481 AbstractCegarLoop]: Abstraction has 6581 states and 8486 transitions. [2020-12-09 10:55:23,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 8486 transitions. [2020-12-09 10:55:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-09 10:55:23,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:23,279 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:23,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 10:55:23,480 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1925394308, now seen corresponding path program 1 times [2020-12-09 10:55:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:23,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380922878] [2020-12-09 10:55:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:23,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380922878] [2020-12-09 10:55:23,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:23,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:55:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603166787] [2020-12-09 10:55:23,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:23,558 INFO L87 Difference]: Start difference. First operand 6581 states and 8486 transitions. Second operand 3 states. [2020-12-09 10:55:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:24,229 INFO L93 Difference]: Finished difference Result 15878 states and 20435 transitions. [2020-12-09 10:55:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:24,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2020-12-09 10:55:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:24,262 INFO L225 Difference]: With dead ends: 15878 [2020-12-09 10:55:24,262 INFO L226 Difference]: Without dead ends: 9298 [2020-12-09 10:55:24,268 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 [2020-12-09 10:55:24,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9298 states. [2020-12-09 10:55:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9298 to 9298. [2020-12-09 10:55:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9298 states. [2020-12-09 10:55:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9298 states to 9298 states and 11693 transitions. [2020-12-09 10:55:24,410 INFO L78 Accepts]: Start accepts. Automaton has 9298 states and 11693 transitions. Word has length 184 [2020-12-09 10:55:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:24,411 INFO L481 AbstractCegarLoop]: Abstraction has 9298 states and 11693 transitions. [2020-12-09 10:55:24,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9298 states and 11693 transitions. [2020-12-09 10:55:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-09 10:55:24,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:24,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:24,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 10:55:24,423 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2078787361, now seen corresponding path program 1 times [2020-12-09 10:55:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:24,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242986385] [2020-12-09 10:55:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:24,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242986385] [2020-12-09 10:55:24,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:24,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:24,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026380416] [2020-12-09 10:55:24,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:55:24,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:24,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:55:24,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:55:24,529 INFO L87 Difference]: Start difference. First operand 9298 states and 11693 transitions. Second operand 4 states. [2020-12-09 10:55:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:25,375 INFO L93 Difference]: Finished difference Result 25030 states and 32277 transitions. [2020-12-09 10:55:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:55:25,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 191 [2020-12-09 10:55:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:25,406 INFO L225 Difference]: With dead ends: 25030 [2020-12-09 10:55:25,406 INFO L226 Difference]: Without dead ends: 15733 [2020-12-09 10:55:25,414 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 [2020-12-09 10:55:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15733 states. [2020-12-09 10:55:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15733 to 13588. [2020-12-09 10:55:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13588 states. [2020-12-09 10:55:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13588 states to 13588 states and 16511 transitions. [2020-12-09 10:55:25,584 INFO L78 Accepts]: Start accepts. Automaton has 13588 states and 16511 transitions. Word has length 191 [2020-12-09 10:55:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:25,584 INFO L481 AbstractCegarLoop]: Abstraction has 13588 states and 16511 transitions. [2020-12-09 10:55:25,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:55:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13588 states and 16511 transitions. [2020-12-09 10:55:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-09 10:55:25,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:25,596 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:25,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 10:55:25,596 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2093034103, now seen corresponding path program 1 times [2020-12-09 10:55:25,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:25,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712928385] [2020-12-09 10:55:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-09 10:55:25,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712928385] [2020-12-09 10:55:25,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372770657] [2020-12-09 10:55:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/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 [2020-12-09 10:55:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:25,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:55:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:55:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-09 10:55:25,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:55:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-09 10:55:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:55:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2020-12-09 10:55:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295539661] [2020-12-09 10:55:26,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:55:26,033 INFO L87 Difference]: Start difference. First operand 13588 states and 16511 transitions. Second operand 3 states. [2020-12-09 10:55:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:26,385 INFO L93 Difference]: Finished difference Result 26460 states and 32072 transitions. [2020-12-09 10:55:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:26,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-09 10:55:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:26,402 INFO L225 Difference]: With dead ends: 26460 [2020-12-09 10:55:26,402 INFO L226 Difference]: Without dead ends: 12873 [2020-12-09 10:55:26,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:55:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12873 states. [2020-12-09 10:55:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12873 to 11586. [2020-12-09 10:55:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11586 states. [2020-12-09 10:55:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11586 states to 11586 states and 13868 transitions. [2020-12-09 10:55:26,538 INFO L78 Accepts]: Start accepts. Automaton has 11586 states and 13868 transitions. Word has length 212 [2020-12-09 10:55:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:26,538 INFO L481 AbstractCegarLoop]: Abstraction has 11586 states and 13868 transitions. [2020-12-09 10:55:26,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11586 states and 13868 transitions. [2020-12-09 10:55:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-09 10:55:26,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:26,548 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:26,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:55:26,749 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash -214455751, now seen corresponding path program 1 times [2020-12-09 10:55:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:26,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517203935] [2020-12-09 10:55:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 10:55:26,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517203935] [2020-12-09 10:55:26,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:26,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:26,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620765894] [2020-12-09 10:55:26,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:55:26,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:26,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:55:26,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:55:26,886 INFO L87 Difference]: Start difference. First operand 11586 states and 13868 transitions. Second operand 4 states. [2020-12-09 10:55:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:27,636 INFO L93 Difference]: Finished difference Result 38617 states and 46366 transitions. [2020-12-09 10:55:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:55:27,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 219 [2020-12-09 10:55:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:27,661 INFO L225 Difference]: With dead ends: 38617 [2020-12-09 10:55:27,661 INFO L226 Difference]: Without dead ends: 27032 [2020-12-09 10:55:27,672 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 [2020-12-09 10:55:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27032 states. [2020-12-09 10:55:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27032 to 24599. [2020-12-09 10:55:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24599 states. [2020-12-09 10:55:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24599 states to 24599 states and 29501 transitions. [2020-12-09 10:55:27,919 INFO L78 Accepts]: Start accepts. Automaton has 24599 states and 29501 transitions. Word has length 219 [2020-12-09 10:55:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:27,919 INFO L481 AbstractCegarLoop]: Abstraction has 24599 states and 29501 transitions. [2020-12-09 10:55:27,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:55:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24599 states and 29501 transitions. [2020-12-09 10:55:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-09 10:55:27,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:27,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:27,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 10:55:27,930 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash -867368072, now seen corresponding path program 1 times [2020-12-09 10:55:27,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:27,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834480214] [2020-12-09 10:55:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 10:55:28,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834480214] [2020-12-09 10:55:28,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938702822] [2020-12-09 10:55:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:55:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:28,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:55:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:55:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-09 10:55:28,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:55:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-09 10:55:28,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:55:28,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 10:55:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969101608] [2020-12-09 10:55:28,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:55:28,473 INFO L87 Difference]: Start difference. First operand 24599 states and 29501 transitions. Second operand 3 states. [2020-12-09 10:55:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:29,104 INFO L93 Difference]: Finished difference Result 51628 states and 61879 transitions. [2020-12-09 10:55:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:29,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2020-12-09 10:55:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:29,130 INFO L225 Difference]: With dead ends: 51628 [2020-12-09 10:55:29,130 INFO L226 Difference]: Without dead ends: 27030 [2020-12-09 10:55:29,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:55:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27030 states. [2020-12-09 10:55:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27030 to 26315. [2020-12-09 10:55:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26315 states. [2020-12-09 10:55:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 30906 transitions. [2020-12-09 10:55:29,380 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 30906 transitions. Word has length 222 [2020-12-09 10:55:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:29,380 INFO L481 AbstractCegarLoop]: Abstraction has 26315 states and 30906 transitions. [2020-12-09 10:55:29,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 30906 transitions. [2020-12-09 10:55:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-12-09 10:55:29,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:29,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2020-12-09 10:55:29,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-09 10:55:29,601 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash -166678676, now seen corresponding path program 1 times [2020-12-09 10:55:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:29,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894474402] [2020-12-09 10:55:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:29,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894474402] [2020-12-09 10:55:29,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509933950] [2020-12-09 10:55:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:55:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:55:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:55:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:55:30,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:55:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:55:30,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:55:30,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 10:55:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299356410] [2020-12-09 10:55:30,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:30,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:55:30,471 INFO L87 Difference]: Start difference. First operand 26315 states and 30906 transitions. Second operand 3 states. [2020-12-09 10:55:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:31,075 INFO L93 Difference]: Finished difference Result 53201 states and 62553 transitions. [2020-12-09 10:55:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:31,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2020-12-09 10:55:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:31,105 INFO L225 Difference]: With dead ends: 53201 [2020-12-09 10:55:31,105 INFO L226 Difference]: Without dead ends: 26887 [2020-12-09 10:55:31,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:55:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26887 states. [2020-12-09 10:55:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26887 to 26458. [2020-12-09 10:55:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26458 states. [2020-12-09 10:55:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26458 states to 26458 states and 31155 transitions. [2020-12-09 10:55:31,392 INFO L78 Accepts]: Start accepts. Automaton has 26458 states and 31155 transitions. Word has length 271 [2020-12-09 10:55:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:31,392 INFO L481 AbstractCegarLoop]: Abstraction has 26458 states and 31155 transitions. [2020-12-09 10:55:31,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26458 states and 31155 transitions. [2020-12-09 10:55:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-12-09 10:55:31,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:31,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:31,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:55:31,625 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1870855141, now seen corresponding path program 1 times [2020-12-09 10:55:31,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:31,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983065538] [2020-12-09 10:55:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-09 10:55:31,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983065538] [2020-12-09 10:55:31,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:31,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:55:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874100575] [2020-12-09 10:55:31,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:31,757 INFO L87 Difference]: Start difference. First operand 26458 states and 31155 transitions. Second operand 3 states. [2020-12-09 10:55:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:32,319 INFO L93 Difference]: Finished difference Result 59924 states and 70486 transitions. [2020-12-09 10:55:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:32,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2020-12-09 10:55:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:32,350 INFO L225 Difference]: With dead ends: 59924 [2020-12-09 10:55:32,350 INFO L226 Difference]: Without dead ends: 33467 [2020-12-09 10:55:32,364 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 [2020-12-09 10:55:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33467 states. [2020-12-09 10:55:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33467 to 28889. [2020-12-09 10:55:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28889 states. [2020-12-09 10:55:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28889 states to 28889 states and 34113 transitions. [2020-12-09 10:55:32,669 INFO L78 Accepts]: Start accepts. Automaton has 28889 states and 34113 transitions. Word has length 273 [2020-12-09 10:55:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:32,670 INFO L481 AbstractCegarLoop]: Abstraction has 28889 states and 34113 transitions. [2020-12-09 10:55:32,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 28889 states and 34113 transitions. [2020-12-09 10:55:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-09 10:55:32,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:32,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:32,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 10:55:32,683 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash 326105827, now seen corresponding path program 1 times [2020-12-09 10:55:32,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:32,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449079792] [2020-12-09 10:55:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:32,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449079792] [2020-12-09 10:55:32,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:32,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:32,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646026731] [2020-12-09 10:55:32,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:55:32,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:32,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:55:32,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:55:32,868 INFO L87 Difference]: Start difference. First operand 28889 states and 34113 transitions. Second operand 4 states. [2020-12-09 10:55:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:33,498 INFO L93 Difference]: Finished difference Result 62496 states and 73833 transitions. [2020-12-09 10:55:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:55:33,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 288 [2020-12-09 10:55:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:33,528 INFO L225 Difference]: With dead ends: 62496 [2020-12-09 10:55:33,528 INFO L226 Difference]: Without dead ends: 33608 [2020-12-09 10:55:33,541 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 [2020-12-09 10:55:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33608 states. [2020-12-09 10:55:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33608 to 33036. [2020-12-09 10:55:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33036 states. [2020-12-09 10:55:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33036 states to 33036 states and 38486 transitions. [2020-12-09 10:55:33,933 INFO L78 Accepts]: Start accepts. Automaton has 33036 states and 38486 transitions. Word has length 288 [2020-12-09 10:55:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:33,933 INFO L481 AbstractCegarLoop]: Abstraction has 33036 states and 38486 transitions. [2020-12-09 10:55:33,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:55:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33036 states and 38486 transitions. [2020-12-09 10:55:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-12-09 10:55:33,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:33,947 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:33,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 10:55:33,947 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1301289165, now seen corresponding path program 1 times [2020-12-09 10:55:33,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:33,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99506098] [2020-12-09 10:55:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:55:34,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99506098] [2020-12-09 10:55:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:34,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91486732] [2020-12-09 10:55:34,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:55:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:55:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:55:34,165 INFO L87 Difference]: Start difference. First operand 33036 states and 38486 transitions. Second operand 3 states. [2020-12-09 10:55:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:34,674 INFO L93 Difference]: Finished difference Result 68788 states and 80027 transitions. [2020-12-09 10:55:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:55:34,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 292 [2020-12-09 10:55:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:34,699 INFO L225 Difference]: With dead ends: 68788 [2020-12-09 10:55:34,699 INFO L226 Difference]: Without dead ends: 30033 [2020-12-09 10:55:34,713 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 [2020-12-09 10:55:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30033 states. [2020-12-09 10:55:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30033 to 25886. [2020-12-09 10:55:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25886 states. [2020-12-09 10:55:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25886 states to 25886 states and 28909 transitions. [2020-12-09 10:55:34,989 INFO L78 Accepts]: Start accepts. Automaton has 25886 states and 28909 transitions. Word has length 292 [2020-12-09 10:55:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:34,989 INFO L481 AbstractCegarLoop]: Abstraction has 25886 states and 28909 transitions. [2020-12-09 10:55:34,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:55:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25886 states and 28909 transitions. [2020-12-09 10:55:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-09 10:55:35,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:35,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:35,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-09 10:55:35,003 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1907118429, now seen corresponding path program 1 times [2020-12-09 10:55:35,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:35,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711059185] [2020-12-09 10:55:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:35,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711059185] [2020-12-09 10:55:35,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:35,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:35,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645539851] [2020-12-09 10:55:35,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:55:35,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:55:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:55:35,158 INFO L87 Difference]: Start difference. First operand 25886 states and 28909 transitions. Second operand 4 states. [2020-12-09 10:55:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:35,762 INFO L93 Difference]: Finished difference Result 53201 states and 59328 transitions. [2020-12-09 10:55:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:55:35,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 294 [2020-12-09 10:55:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:35,784 INFO L225 Difference]: With dead ends: 53201 [2020-12-09 10:55:35,784 INFO L226 Difference]: Without dead ends: 27316 [2020-12-09 10:55:35,795 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 [2020-12-09 10:55:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27316 states. [2020-12-09 10:55:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27316 to 26172. [2020-12-09 10:55:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26172 states. [2020-12-09 10:55:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26172 states to 26172 states and 29113 transitions. [2020-12-09 10:55:36,033 INFO L78 Accepts]: Start accepts. Automaton has 26172 states and 29113 transitions. Word has length 294 [2020-12-09 10:55:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:36,034 INFO L481 AbstractCegarLoop]: Abstraction has 26172 states and 29113 transitions. [2020-12-09 10:55:36,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:55:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26172 states and 29113 transitions. [2020-12-09 10:55:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-12-09 10:55:36,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:36,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:55:36,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-09 10:55:36,079 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 847912799, now seen corresponding path program 1 times [2020-12-09 10:55:36,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:36,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668956236] [2020-12-09 10:55:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-09 10:55:36,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668956236] [2020-12-09 10:55:36,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:36,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:36,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186293386] [2020-12-09 10:55:36,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:55:36,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:36,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:55:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:55:36,255 INFO L87 Difference]: Start difference. First operand 26172 states and 29113 transitions. Second operand 4 states. [2020-12-09 10:55:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:37,025 INFO L93 Difference]: Finished difference Result 54488 states and 60619 transitions. [2020-12-09 10:55:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:55:37,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 298 [2020-12-09 10:55:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:37,058 INFO L225 Difference]: With dead ends: 54488 [2020-12-09 10:55:37,058 INFO L226 Difference]: Without dead ends: 28031 [2020-12-09 10:55:37,073 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 [2020-12-09 10:55:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28031 states. [2020-12-09 10:55:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28031 to 27030. [2020-12-09 10:55:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27030 states. [2020-12-09 10:55:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27030 states to 27030 states and 30070 transitions. [2020-12-09 10:55:37,377 INFO L78 Accepts]: Start accepts. Automaton has 27030 states and 30070 transitions. Word has length 298 [2020-12-09 10:55:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:37,377 INFO L481 AbstractCegarLoop]: Abstraction has 27030 states and 30070 transitions. [2020-12-09 10:55:37,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:55:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 27030 states and 30070 transitions. [2020-12-09 10:55:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-12-09 10:55:37,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:37,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2020-12-09 10:55:37,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-09 10:55:37,386 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1359939950, now seen corresponding path program 1 times [2020-12-09 10:55:37,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:37,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133048540] [2020-12-09 10:55:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:55:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133048540] [2020-12-09 10:55:37,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:55:37,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:55:37,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310838030] [2020-12-09 10:55:37,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:55:37,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:55:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:55:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:55:37,568 INFO L87 Difference]: Start difference. First operand 27030 states and 30070 transitions. Second operand 4 states. [2020-12-09 10:55:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:55:38,154 INFO L93 Difference]: Finished difference Result 54488 states and 60581 transitions. [2020-12-09 10:55:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:55:38,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 308 [2020-12-09 10:55:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:55:38,182 INFO L225 Difference]: With dead ends: 54488 [2020-12-09 10:55:38,183 INFO L226 Difference]: Without dead ends: 27173 [2020-12-09 10:55:38,193 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 [2020-12-09 10:55:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27173 states. [2020-12-09 10:55:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27173 to 26315. [2020-12-09 10:55:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26315 states. [2020-12-09 10:55:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 29256 transitions. [2020-12-09 10:55:38,452 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 29256 transitions. Word has length 308 [2020-12-09 10:55:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:55:38,452 INFO L481 AbstractCegarLoop]: Abstraction has 26315 states and 29256 transitions. [2020-12-09 10:55:38,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:55:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 29256 transitions. [2020-12-09 10:55:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-12-09 10:55:38,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:55:38,463 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2020-12-09 10:55:38,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-09 10:55:38,464 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:55:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:55:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash -394471307, now seen corresponding path program 1 times [2020-12-09 10:55:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:55:38,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660669776] [2020-12-09 10:55:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:55:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-09 10:55:38,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660669776] [2020-12-09 10:55:38,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201018117] [2020-12-09 10:55:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:55:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:55:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 10:55:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:55:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:55:39,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:55:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:55:39,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059307904] [2020-12-09 10:55:39,323 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2020-12-09 10:55:39,323 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:55:39,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:55:39,331 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:55:39,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:55:40,705 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:40,860 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:41,120 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:41,272 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:41,465 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:41,581 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:41,926 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:42,058 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:42,235 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:42,351 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:42,503 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:42,618 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:42,950 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:43,066 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:43,241 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:43,357 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-12-09 10:55:43,617 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 255 [2020-12-09 10:55:47,184 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:47,299 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:47,459 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:47,575 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:47,741 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:47,857 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,009 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,124 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,311 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,427 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,586 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,702 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,864 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:48,979 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,129 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,245 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,400 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,515 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,674 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,802 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:49,951 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,067 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,300 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,416 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,576 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,692 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,849 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:50,964 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,115 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,244 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,403 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,518 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,667 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,782 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:51,927 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,043 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,193 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,309 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,464 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,580 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,737 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:52,866 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,038 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,154 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,305 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,421 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,575 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,690 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,840 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:53,955 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,105 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,221 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,405 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,521 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,672 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,787 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:54,936 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:55,052 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:55,221 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-12-09 10:55:55,502 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-12-09 10:55:55,666 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-12-09 10:55:56,086 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-12-09 10:55:56,450 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-12-09 10:55:56,735 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:56,851 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,011 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,127 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,291 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,407 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,573 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,689 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,860 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:57,975 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,133 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,248 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,411 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,526 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,677 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,793 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:58,959 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,087 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,246 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,361 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,510 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,626 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,858 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:55:59,973 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,134 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,250 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,407 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,535 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,687 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,803 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:00,962 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,078 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,227 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,342 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,487 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,602 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,753 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:01,868 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,037 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,153 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,311 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,426 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,597 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,712 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,864 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:02,979 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,131 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,247 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,396 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,511 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,664 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,779 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:03,948 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:04,063 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:04,213 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:04,328 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:04,478 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:04,595 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-09 10:56:04,601 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 10:56:04,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:56:04,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2020-12-09 10:56:04,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714490134] [2020-12-09 10:56:04,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 10:56:04,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 10:56:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:56:04,604 INFO L87 Difference]: Start difference. First operand 26315 states and 29256 transitions. Second operand 7 states. [2020-12-09 10:56:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:07,790 INFO L93 Difference]: Finished difference Result 89527 states and 99542 transitions. [2020-12-09 10:56:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 10:56:07,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 315 [2020-12-09 10:56:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:07,847 INFO L225 Difference]: With dead ends: 89527 [2020-12-09 10:56:07,847 INFO L226 Difference]: Without dead ends: 62355 [2020-12-09 10:56:07,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-09 10:56:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62355 states. [2020-12-09 10:56:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62355 to 56917. [2020-12-09 10:56:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56917 states. [2020-12-09 10:56:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56917 states to 56917 states and 62689 transitions. [2020-12-09 10:56:08,476 INFO L78 Accepts]: Start accepts. Automaton has 56917 states and 62689 transitions. Word has length 315 [2020-12-09 10:56:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:08,476 INFO L481 AbstractCegarLoop]: Abstraction has 56917 states and 62689 transitions. [2020-12-09 10:56:08,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 10:56:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 56917 states and 62689 transitions. [2020-12-09 10:56:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-09 10:56:08,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:08,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-12-09 10:56:08,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:08,689 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1279082785, now seen corresponding path program 1 times [2020-12-09 10:56:08,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:08,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468688172] [2020-12-09 10:56:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 188 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:56:09,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468688172] [2020-12-09 10:56:09,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482927201] [2020-12-09 10:56:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:56:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:56:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:56:09,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:56:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:56:09,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:56:09,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 9 [2020-12-09 10:56:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173122068] [2020-12-09 10:56:09,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:56:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:56:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 10:56:09,993 INFO L87 Difference]: Start difference. First operand 56917 states and 62689 transitions. Second operand 4 states. [2020-12-09 10:56:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:10,946 INFO L93 Difference]: Finished difference Result 124417 states and 136657 transitions. [2020-12-09 10:56:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:56:10,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-12-09 10:56:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:11,000 INFO L225 Difference]: With dead ends: 124417 [2020-12-09 10:56:11,000 INFO L226 Difference]: Without dead ends: 66071 [2020-12-09 10:56:11,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 10:56:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66071 states. [2020-12-09 10:56:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66071 to 63352. [2020-12-09 10:56:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63352 states. [2020-12-09 10:56:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63352 states to 63352 states and 69201 transitions. [2020-12-09 10:56:11,682 INFO L78 Accepts]: Start accepts. Automaton has 63352 states and 69201 transitions. Word has length 326 [2020-12-09 10:56:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:11,682 INFO L481 AbstractCegarLoop]: Abstraction has 63352 states and 69201 transitions. [2020-12-09 10:56:11,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:56:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 63352 states and 69201 transitions. [2020-12-09 10:56:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-12-09 10:56:11,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:11,695 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-12-09 10:56:11,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:11,897 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:11,898 INFO L82 PathProgramCache]: Analyzing trace with hash 540994392, now seen corresponding path program 1 times [2020-12-09 10:56:11,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:11,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855628140] [2020-12-09 10:56:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-09 10:56:12,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855628140] [2020-12-09 10:56:12,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:56:12,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:56:12,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431078564] [2020-12-09 10:56:12,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:56:12,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:56:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:56:12,109 INFO L87 Difference]: Start difference. First operand 63352 states and 69201 transitions. Second operand 3 states. [2020-12-09 10:56:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:12,863 INFO L93 Difference]: Finished difference Result 136570 states and 149939 transitions. [2020-12-09 10:56:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:56:12,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 353 [2020-12-09 10:56:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:12,918 INFO L225 Difference]: With dead ends: 136570 [2020-12-09 10:56:12,918 INFO L226 Difference]: Without dead ends: 73219 [2020-12-09 10:56:12,933 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 [2020-12-09 10:56:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73219 states. [2020-12-09 10:56:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73219 to 72647. [2020-12-09 10:56:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72647 states. [2020-12-09 10:56:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72647 states to 72647 states and 79894 transitions. [2020-12-09 10:56:13,674 INFO L78 Accepts]: Start accepts. Automaton has 72647 states and 79894 transitions. Word has length 353 [2020-12-09 10:56:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:13,674 INFO L481 AbstractCegarLoop]: Abstraction has 72647 states and 79894 transitions. [2020-12-09 10:56:13,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:56:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 72647 states and 79894 transitions. [2020-12-09 10:56:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-12-09 10:56:13,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:13,694 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-12-09 10:56:13,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2020-12-09 10:56:13,694 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:13,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1213564439, now seen corresponding path program 1 times [2020-12-09 10:56:13,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:13,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159152832] [2020-12-09 10:56:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-09 10:56:14,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159152832] [2020-12-09 10:56:14,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:56:14,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:56:14,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850791199] [2020-12-09 10:56:14,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:56:14,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:56:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:56:14,034 INFO L87 Difference]: Start difference. First operand 72647 states and 79894 transitions. Second operand 4 states. [2020-12-09 10:56:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:15,001 INFO L93 Difference]: Finished difference Result 198489 states and 217602 transitions. [2020-12-09 10:56:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:56:15,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 388 [2020-12-09 10:56:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:15,122 INFO L225 Difference]: With dead ends: 198489 [2020-12-09 10:56:15,122 INFO L226 Difference]: Without dead ends: 125557 [2020-12-09 10:56:15,160 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 [2020-12-09 10:56:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125557 states. [2020-12-09 10:56:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125557 to 114403. [2020-12-09 10:56:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114403 states. [2020-12-09 10:56:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114403 states to 114403 states and 124989 transitions. [2020-12-09 10:56:16,728 INFO L78 Accepts]: Start accepts. Automaton has 114403 states and 124989 transitions. Word has length 388 [2020-12-09 10:56:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:16,728 INFO L481 AbstractCegarLoop]: Abstraction has 114403 states and 124989 transitions. [2020-12-09 10:56:16,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:56:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 114403 states and 124989 transitions. [2020-12-09 10:56:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2020-12-09 10:56:16,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:16,817 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-12-09 10:56:16,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2020-12-09 10:56:16,817 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1899225994, now seen corresponding path program 1 times [2020-12-09 10:56:16,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:16,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042049300] [2020-12-09 10:56:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-12-09 10:56:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042049300] [2020-12-09 10:56:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:56:17,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:56:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461260447] [2020-12-09 10:56:17,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:56:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:56:17,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:56:17,246 INFO L87 Difference]: Start difference. First operand 114403 states and 124989 transitions. Second operand 3 states. [2020-12-09 10:56:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:18,361 INFO L93 Difference]: Finished difference Result 259264 states and 282912 transitions. [2020-12-09 10:56:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:56:18,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 557 [2020-12-09 10:56:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:18,491 INFO L225 Difference]: With dead ends: 259264 [2020-12-09 10:56:18,492 INFO L226 Difference]: Without dead ends: 145005 [2020-12-09 10:56:18,546 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 [2020-12-09 10:56:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145005 states. [2020-12-09 10:56:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145005 to 123269. [2020-12-09 10:56:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123269 states. [2020-12-09 10:56:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123269 states to 123269 states and 134833 transitions. [2020-12-09 10:56:20,080 INFO L78 Accepts]: Start accepts. Automaton has 123269 states and 134833 transitions. Word has length 557 [2020-12-09 10:56:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:20,080 INFO L481 AbstractCegarLoop]: Abstraction has 123269 states and 134833 transitions. [2020-12-09 10:56:20,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:56:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 123269 states and 134833 transitions. [2020-12-09 10:56:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2020-12-09 10:56:20,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:20,145 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:56:20,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2020-12-09 10:56:20,146 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash -674441874, now seen corresponding path program 1 times [2020-12-09 10:56:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:20,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986851306] [2020-12-09 10:56:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 588 proven. 0 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-12-09 10:56:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986851306] [2020-12-09 10:56:20,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:56:20,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:56:20,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266857950] [2020-12-09 10:56:20,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:56:20,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:20,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:56:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:56:20,446 INFO L87 Difference]: Start difference. First operand 123269 states and 134833 transitions. Second operand 3 states. [2020-12-09 10:56:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:21,454 INFO L93 Difference]: Finished difference Result 248968 states and 271940 transitions. [2020-12-09 10:56:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:56:21,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 560 [2020-12-09 10:56:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:21,579 INFO L225 Difference]: With dead ends: 248968 [2020-12-09 10:56:21,579 INFO L226 Difference]: Without dead ends: 125843 [2020-12-09 10:56:21,639 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 [2020-12-09 10:56:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125843 states. [2020-12-09 10:56:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125843 to 114689. [2020-12-09 10:56:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114689 states. [2020-12-09 10:56:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114689 states to 114689 states and 125036 transitions. [2020-12-09 10:56:23,140 INFO L78 Accepts]: Start accepts. Automaton has 114689 states and 125036 transitions. Word has length 560 [2020-12-09 10:56:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:23,140 INFO L481 AbstractCegarLoop]: Abstraction has 114689 states and 125036 transitions. [2020-12-09 10:56:23,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:56:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 114689 states and 125036 transitions. [2020-12-09 10:56:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2020-12-09 10:56:23,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:23,199 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-09 10:56:23,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2020-12-09 10:56:23,200 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1771607289, now seen corresponding path program 2 times [2020-12-09 10:56:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986185234] [2020-12-09 10:56:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-12-09 10:56:23,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986185234] [2020-12-09 10:56:23,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:56:23,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:56:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247758953] [2020-12-09 10:56:23,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:56:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:56:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:56:23,533 INFO L87 Difference]: Start difference. First operand 114689 states and 125036 transitions. Second operand 4 states. [2020-12-09 10:56:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:24,618 INFO L93 Difference]: Finished difference Result 226088 states and 246053 transitions. [2020-12-09 10:56:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:56:24,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 564 [2020-12-09 10:56:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:24,721 INFO L225 Difference]: With dead ends: 226088 [2020-12-09 10:56:24,721 INFO L226 Difference]: Without dead ends: 111543 [2020-12-09 10:56:24,763 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 [2020-12-09 10:56:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111543 states. [2020-12-09 10:56:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111543 to 94812. [2020-12-09 10:56:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94812 states. [2020-12-09 10:56:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94812 states to 94812 states and 103145 transitions. [2020-12-09 10:56:26,039 INFO L78 Accepts]: Start accepts. Automaton has 94812 states and 103145 transitions. Word has length 564 [2020-12-09 10:56:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:26,040 INFO L481 AbstractCegarLoop]: Abstraction has 94812 states and 103145 transitions. [2020-12-09 10:56:26,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:56:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 94812 states and 103145 transitions. [2020-12-09 10:56:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2020-12-09 10:56:26,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:26,086 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-12-09 10:56:26,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2020-12-09 10:56:26,086 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1156170793, now seen corresponding path program 1 times [2020-12-09 10:56:26,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:26,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075098485] [2020-12-09 10:56:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 596 proven. 133 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-09 10:56:26,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075098485] [2020-12-09 10:56:26,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026593679] [2020-12-09 10:56:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:26,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:56:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:56:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 771 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-12-09 10:56:27,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:56:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 771 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-12-09 10:56:27,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:56:27,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 10:56:27,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660906107] [2020-12-09 10:56:27,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:56:27,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:27,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:56:27,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:56:27,956 INFO L87 Difference]: Start difference. First operand 94812 states and 103145 transitions. Second operand 3 states. [2020-12-09 10:56:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:28,951 INFO L93 Difference]: Finished difference Result 246968 states and 267916 transitions. [2020-12-09 10:56:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:56:28,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 570 [2020-12-09 10:56:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:29,077 INFO L225 Difference]: With dead ends: 246968 [2020-12-09 10:56:29,078 INFO L226 Difference]: Without dead ends: 152300 [2020-12-09 10:56:29,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:56:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152300 states. [2020-12-09 10:56:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152300 to 144576. [2020-12-09 10:56:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144576 states. [2020-12-09 10:56:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144576 states to 144576 states and 156885 transitions. [2020-12-09 10:56:30,784 INFO L78 Accepts]: Start accepts. Automaton has 144576 states and 156885 transitions. Word has length 570 [2020-12-09 10:56:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:30,784 INFO L481 AbstractCegarLoop]: Abstraction has 144576 states and 156885 transitions. [2020-12-09 10:56:30,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:56:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 144576 states and 156885 transitions. [2020-12-09 10:56:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-12-09 10:56:30,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:30,849 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-12-09 10:56:31,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:31,051 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:31,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1533849149, now seen corresponding path program 1 times [2020-12-09 10:56:31,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:31,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891021300] [2020-12-09 10:56:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 806 proven. 192 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-09 10:56:31,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891021300] [2020-12-09 10:56:31,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322435612] [2020-12-09 10:56:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:31,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:56:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:56:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2020-12-09 10:56:32,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:56:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2020-12-09 10:56:32,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:56:32,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2020-12-09 10:56:32,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612684196] [2020-12-09 10:56:32,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:56:32,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:56:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:56:32,555 INFO L87 Difference]: Start difference. First operand 144576 states and 156885 transitions. Second operand 4 states. [2020-12-09 10:56:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:33,745 INFO L93 Difference]: Finished difference Result 291296 states and 316041 transitions. [2020-12-09 10:56:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:56:33,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 623 [2020-12-09 10:56:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:33,878 INFO L225 Difference]: With dead ends: 291296 [2020-12-09 10:56:33,878 INFO L226 Difference]: Without dead ends: 146864 [2020-12-09 10:56:33,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1243 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:56:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146864 states. [2020-12-09 10:56:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146864 to 146435. [2020-12-09 10:56:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146435 states. [2020-12-09 10:56:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146435 states to 146435 states and 158808 transitions. [2020-12-09 10:56:35,770 INFO L78 Accepts]: Start accepts. Automaton has 146435 states and 158808 transitions. Word has length 623 [2020-12-09 10:56:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:35,771 INFO L481 AbstractCegarLoop]: Abstraction has 146435 states and 158808 transitions. [2020-12-09 10:56:35,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:56:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 146435 states and 158808 transitions. [2020-12-09 10:56:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2020-12-09 10:56:35,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:56:35,860 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-12-09 10:56:36,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2020-12-09 10:56:36,062 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:56:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:56:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash -767500762, now seen corresponding path program 2 times [2020-12-09 10:56:36,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:56:36,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771707128] [2020-12-09 10:56:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:56:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:56:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 914 proven. 192 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-09 10:56:36,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771707128] [2020-12-09 10:56:36,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585659988] [2020-12-09 10:56:36,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:56:36,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 10:56:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:56:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:56:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:56:36,962 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-09 10:56:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2020-12-09 10:56:37,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:56:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2020-12-09 10:56:38,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:56:38,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-12-09 10:56:38,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255275305] [2020-12-09 10:56:38,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:56:38,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:56:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:56:38,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:56:38,014 INFO L87 Difference]: Start difference. First operand 146435 states and 158808 transitions. Second operand 3 states. [2020-12-09 10:56:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:56:39,096 INFO L93 Difference]: Finished difference Result 297300 states and 322478 transitions. [2020-12-09 10:56:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:56:39,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 657 [2020-12-09 10:56:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:56:39,098 INFO L225 Difference]: With dead ends: 297300 [2020-12-09 10:56:39,098 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:56:39,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1312 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:56:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:56:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:56:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:56:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:56:39,178 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 657 [2020-12-09 10:56:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:56:39,178 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:56:39,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:56:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:56:39,179 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:56:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-12-09 10:56:39,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 10:56:59,293 WARN L197 SmtUtils]: Spent 19.87 s on a formula simplification. DAG size of input: 2497 DAG size of output: 1054 [2020-12-09 10:57:18,972 WARN L197 SmtUtils]: Spent 19.67 s on a formula simplification. DAG size of input: 2497 DAG size of output: 1054 [2020-12-09 10:57:34,271 WARN L197 SmtUtils]: Spent 15.29 s on a formula simplification. DAG size of input: 893 DAG size of output: 124 [2020-12-09 10:57:48,555 WARN L197 SmtUtils]: Spent 14.28 s on a formula simplification. DAG size of input: 893 DAG size of output: 124 [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L498(lines 498 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L432(lines 432 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L366(lines 366 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L763(lines 763 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L632(lines 632 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L566(lines 566 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L302(lines 302 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1293(lines 1293 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1360(lines 1360 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1162(lines 1162 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L105(lines 105 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1096(lines 1096 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1031(lines 1031 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L965(lines 965 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L899(lines 899 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L174(lines 174 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L835(lines 835 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L771(lines 771 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L507(lines 507 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L243(lines 243 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1433(lines 1433 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L376(lines 376 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L311(lines 311 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L1236(lines 1236 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L576(lines 576 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,558 INFO L262 CegarLoopResult]: For program point L444(lines 444 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1369(lines 1369 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1105(lines 1105 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L643(lines 643 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1172(lines 1172 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L115(lines 115 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L248(lines 248 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L182(lines 182 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1041(lines 1041 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L909(lines 909 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L711(lines 711 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L976(lines 976 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L779(lines 779 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L846(lines 846 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L451(lines 451 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1442(lines 1442 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L584(lines 584 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L387(lines 387 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1114(lines 1114 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1048(lines 1048 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L322(lines 322 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L1247(lines 1247 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L124(lines 124 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L917(lines 917 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,559 INFO L262 CegarLoopResult]: For program point L719(lines 719 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L653(lines 653 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L191(lines 191 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L1315(lines 1315 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L258(lines 258 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L1183(lines 1183 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L985(lines 985 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L787(lines 787 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L523(lines 523 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L854(lines 854 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L460(lines 460 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L593(lines 593 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L1452(lines 1452 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L329(lines 329 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L1122(lines 1122 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L65(lines 65 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1600) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L794(lines 794 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L1323(lines 1323 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L993(lines 993 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L927(lines 927 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L663(lines 663 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L267(lines 267 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L201(lines 201 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L1192(lines 1192 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,560 INFO L262 CegarLoopResult]: For program point L532(lines 532 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L1391(lines 1391 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L1259(lines 1259 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L136(lines 136 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L863(lines 863 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L468(lines 468 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L1130(lines 1130 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,561 INFO L262 CegarLoopResult]: For program point L668(lines 668 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L258 CegarLoopResult]: At program point L1659(lines 64 1660) the Hoare annotation is: (let ((.cse4 (= ~a11~0 1)) (.cse11 (= ~a27~0 1)) (.cse12 (= ~a6~0 1)) (.cse3 (= ~a26~0 1))) (let ((.cse25 (not .cse3)) (.cse14 (not .cse12)) (.cse8 (not .cse11)) (.cse9 (not .cse4)) (.cse26 (= ~a6~0 0)) (.cse28 (= ~a8~0 1)) (.cse20 (= ~a12~0 1)) (.cse27 (= ~a7~0 1))) (let ((.cse15 (or (and .cse20 .cse11 .cse3 .cse4 (not .cse27)) (and .cse27 .cse12))) (.cse23 (or (= ~a2~0 1) .cse28)) (.cse22 (or (and .cse26 .cse28) .cse12)) (.cse6 (= ~a29~0 1)) (.cse18 (or (and (or .cse25 (not .cse20) .cse14 .cse8 .cse4) (or .cse20 .cse11 .cse9 .cse12)) .cse27)) (.cse24 (or .cse11 .cse12)) (.cse21 (or (and .cse26 .cse3) (and (= ~a26~0 0) .cse12))) (.cse10 (<= ~a3~0 0)) (.cse5 (= ~a15~0 1)) (.cse16 (<= ~a11~0 0)) (.cse13 (<= ~a3~0 1)) (.cse0 (= ~a5~0 1)) (.cse7 (<= ~a26~0 0)) (.cse1 (= ~a16~0 1)) (.cse2 (= ~a22~0 1)) (.cse19 (= 2 ~a3~0)) (.cse17 (<= ~a6~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 .cse7 .cse1 .cse2 .cse8 .cse9 .cse10) (and .cse0 .cse11 .cse3 .cse12 .cse5 .cse13) (and .cse0 .cse1 .cse2 .cse14 .cse9 .cse13) (and .cse0 .cse3 .cse9 .cse5 .cse12 .cse10) (and .cse0 .cse11 .cse3 .cse12 .cse13 .cse15) (and .cse16 .cse0 .cse7 .cse17 .cse10) (and .cse0 .cse11 .cse18 .cse1 .cse2 .cse19 .cse5 (or .cse3 .cse12)) (and .cse0 .cse11 .cse1 .cse2 .cse4 .cse17) (and .cse0 .cse11 .cse14 .cse9 .cse5 .cse10) (and .cse0 .cse18 .cse1 .cse2 .cse3 .cse9 .cse12) (and .cse20 .cse0 .cse1 .cse3 .cse14 .cse10) (and .cse0 .cse21 .cse18 .cse1 .cse2) (and .cse20 .cse0 .cse3 .cse9 .cse5 .cse10) (and .cse7 .cse0 .cse9 .cse5 .cse17 .cse10) (and .cse0 .cse11 .cse3 .cse12 .cse10) (and .cse0 .cse3 .cse9 .cse12 .cse6 .cse10) (and .cse20 .cse16 .cse0 .cse3 .cse10) (and .cse20 .cse0 .cse18 .cse1 .cse2 .cse3 .cse19 .cse9) (and .cse0 .cse22 .cse23 .cse18 .cse1 .cse2 .cse24) (and .cse20 .cse0 .cse11 .cse1 .cse2 .cse5 .cse10) (and .cse0 .cse1 .cse2 .cse3 .cse19 .cse4 .cse12) (and .cse16 .cse0 .cse3 .cse12 .cse10) (and .cse0 .cse1 .cse2 .cse19 .cse6 .cse15) (and .cse0 .cse11 .cse23 .cse18 .cse3 .cse12 .cse13) (and .cse0 .cse1 .cse3 .cse14 .cse24 .cse5 .cse4 .cse13) (and .cse20 .cse16 .cse0 .cse21 .cse24 .cse6 .cse13 .cse17) (and .cse0 .cse11 .cse1 .cse2 .cse14 .cse13) (and .cse20 .cse0 .cse11 .cse3 .cse4 .cse13 .cse17) (and .cse0 .cse25 .cse11 .cse22 .cse1 .cse2 .cse5 .cse6) (and .cse7 .cse0 .cse11 .cse14 .cse9 .cse6 .cse10) (and .cse0 .cse11 .cse1 .cse3 .cse14 .cse4 .cse10) (and .cse20 .cse0 .cse11 .cse3 .cse10) (and .cse20 .cse0 .cse11 .cse1 .cse2 .cse19 .cse4 .cse12) (and .cse0 .cse11 .cse18 .cse1 .cse2 .cse9 .cse13 .cse6) (and .cse0 .cse11 .cse18 .cse3 .cse9 .cse12 .cse13) (and .cse16 .cse0 .cse7 .cse14 .cse24 .cse10) (and .cse0 .cse11 .cse1 .cse2 .cse3 .cse19 .cse4) (and .cse0 .cse21 .cse1 .cse2 .cse13) (and .cse16 .cse0 .cse1 .cse2 .cse12) (and .cse20 .cse0 .cse1 .cse2 .cse3 .cse19 .cse17) (and .cse0 .cse11 .cse1 .cse2 .cse9 .cse5 .cse10) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse12 .cse13) (and .cse16 .cse0 .cse11 .cse3 .cse12 .cse13) (and .cse0 .cse11 .cse7 .cse1 .cse2 .cse17) (and .cse0 .cse7 .cse1 .cse2 .cse19 .cse4 .cse17))))) [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L602(lines 602 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1462(lines 1462 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L339(lines 339 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1331(lines 1331 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L265 CegarLoopResult]: At program point L1662(lines 1662 1679) the Hoare annotation is: true [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L539(lines 539 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1596-1(lines 64 1660) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L407(lines 407 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L275(lines 275 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1200(lines 1200 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L805(lines 805 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L145(lines 145 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1004(lines 1004 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1599-1(lines 64 1660) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1137(lines 1137 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1071(lines 1071 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L873(lines 873 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L675(lines 675 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1600(line 1600) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L477(lines 477 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L1336(lines 1336 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,562 INFO L262 CegarLoopResult]: For program point L743(lines 743 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L258 CegarLoopResult]: At program point L1668-2(lines 1668 1678) the Hoare annotation is: (let ((.cse4 (= ~a11~0 1)) (.cse11 (= ~a27~0 1)) (.cse12 (= ~a6~0 1)) (.cse3 (= ~a26~0 1))) (let ((.cse25 (not .cse3)) (.cse14 (not .cse12)) (.cse8 (not .cse11)) (.cse9 (not .cse4)) (.cse26 (= ~a6~0 0)) (.cse28 (= ~a8~0 1)) (.cse20 (= ~a12~0 1)) (.cse27 (= ~a7~0 1))) (let ((.cse15 (or (and .cse20 .cse11 .cse3 .cse4 (not .cse27)) (and .cse27 .cse12))) (.cse23 (or (= ~a2~0 1) .cse28)) (.cse22 (or (and .cse26 .cse28) .cse12)) (.cse6 (= ~a29~0 1)) (.cse18 (or (and (or .cse25 (not .cse20) .cse14 .cse8 .cse4) (or .cse20 .cse11 .cse9 .cse12)) .cse27)) (.cse24 (or .cse11 .cse12)) (.cse21 (or (and .cse26 .cse3) (and (= ~a26~0 0) .cse12))) (.cse10 (<= ~a3~0 0)) (.cse5 (= ~a15~0 1)) (.cse16 (<= ~a11~0 0)) (.cse13 (<= ~a3~0 1)) (.cse0 (= ~a5~0 1)) (.cse7 (<= ~a26~0 0)) (.cse1 (= ~a16~0 1)) (.cse2 (= ~a22~0 1)) (.cse19 (= 2 ~a3~0)) (.cse17 (<= ~a6~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 .cse7 .cse1 .cse2 .cse8 .cse9 .cse10) (and .cse0 .cse11 .cse3 .cse12 .cse5 .cse13) (and .cse0 .cse1 .cse2 .cse14 .cse9 .cse13) (and .cse0 .cse3 .cse9 .cse5 .cse12 .cse10) (and .cse0 .cse11 .cse3 .cse12 .cse13 .cse15) (and .cse16 .cse0 .cse7 .cse17 .cse10) (and .cse0 .cse11 .cse18 .cse1 .cse2 .cse19 .cse5 (or .cse3 .cse12)) (and .cse0 .cse11 .cse1 .cse2 .cse4 .cse17) (and .cse0 .cse11 .cse14 .cse9 .cse5 .cse10) (and .cse0 .cse18 .cse1 .cse2 .cse3 .cse9 .cse12) (and .cse20 .cse0 .cse1 .cse3 .cse14 .cse10) (and .cse0 .cse21 .cse18 .cse1 .cse2) (and .cse20 .cse0 .cse3 .cse9 .cse5 .cse10) (and .cse7 .cse0 .cse9 .cse5 .cse17 .cse10) (and .cse0 .cse11 .cse3 .cse12 .cse10) (and .cse0 .cse3 .cse9 .cse12 .cse6 .cse10) (and .cse20 .cse16 .cse0 .cse3 .cse10) (and .cse20 .cse0 .cse18 .cse1 .cse2 .cse3 .cse19 .cse9) (and .cse0 .cse22 .cse23 .cse18 .cse1 .cse2 .cse24) (and .cse20 .cse0 .cse11 .cse1 .cse2 .cse5 .cse10) (and .cse0 .cse1 .cse2 .cse3 .cse19 .cse4 .cse12) (and .cse16 .cse0 .cse3 .cse12 .cse10) (and .cse0 .cse1 .cse2 .cse19 .cse6 .cse15) (and .cse0 .cse11 .cse23 .cse18 .cse3 .cse12 .cse13) (and .cse0 .cse1 .cse3 .cse14 .cse24 .cse5 .cse4 .cse13) (and .cse20 .cse16 .cse0 .cse21 .cse24 .cse6 .cse13 .cse17) (and .cse0 .cse11 .cse1 .cse2 .cse14 .cse13) (and .cse20 .cse0 .cse11 .cse3 .cse4 .cse13 .cse17) (and .cse0 .cse25 .cse11 .cse22 .cse1 .cse2 .cse5 .cse6) (and .cse7 .cse0 .cse11 .cse14 .cse9 .cse6 .cse10) (and .cse0 .cse11 .cse1 .cse3 .cse14 .cse4 .cse10) (and .cse20 .cse0 .cse11 .cse3 .cse10) (and .cse20 .cse0 .cse11 .cse1 .cse2 .cse19 .cse4 .cse12) (and .cse0 .cse11 .cse18 .cse1 .cse2 .cse9 .cse13 .cse6) (and .cse0 .cse11 .cse18 .cse3 .cse9 .cse12 .cse13) (and .cse16 .cse0 .cse7 .cse14 .cse24 .cse10) (and .cse0 .cse11 .cse1 .cse2 .cse3 .cse19 .cse4) (and .cse0 .cse21 .cse1 .cse2 .cse13) (and .cse16 .cse0 .cse1 .cse2 .cse12) (and .cse20 .cse0 .cse1 .cse2 .cse3 .cse19 .cse17) (and .cse0 .cse11 .cse1 .cse2 .cse9 .cse5 .cse10) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse12 .cse13) (and .cse16 .cse0 .cse11 .cse3 .cse12 .cse13) (and .cse0 .cse11 .cse7 .cse1 .cse2 .cse17) (and .cse0 .cse7 .cse1 .cse2 .cse19 .cse4 .cse17))))) [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1470(lines 1470 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L83(lines 83 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L613(lines 613 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L415(lines 415 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L349(lines 349 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1142(lines 1142 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1076(lines 1076 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L878(lines 878 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L549(lines 549 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1210(lines 1210 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L814(lines 814 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1673(line 1673) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L286(lines 286 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1013(lines 1013 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L947(lines 947 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L156(lines 156 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L685(lines 685 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,563 INFO L262 CegarLoopResult]: For program point L1412(lines 1412 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1346(lines 1346 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L223(lines 223 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L92(lines 92 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L753(lines 753 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1084(lines 1084 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L556(lines 556 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L490(lines 490 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L424(lines 424 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L358(lines 358 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1284(lines 1284 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1152(lines 1152 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L624(lines 624 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L294(lines 294 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1021(lines 1021 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L823(lines 823 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1220(lines 1220 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L957(lines 957 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L1354(lines 1354 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L165(lines 165 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L99(lines 99 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L694(lines 694 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,564 INFO L262 CegarLoopResult]: For program point L232(lines 232 1475) no Hoare annotation was computed. [2020-12-09 10:57:48,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:57:48 BoogieIcfgContainer [2020-12-09 10:57:48,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:57:48,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:57:48,603 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:57:48,603 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:57:48,603 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:55:17" (3/4) ... [2020-12-09 10:57:48,605 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:57:48,629 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 119 nodes and edges [2020-12-09 10:57:48,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2020-12-09 10:57:48,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 10:57:48,638 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 10:57:48,762 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_518a56aa-5f5b-4681-87e8-6ccc62d12a3a/bin/utaipan/witness.graphml [2020-12-09 10:57:48,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:57:48,762 INFO L168 Benchmark]: Toolchain (without parser) took 154218.41 ms. Allocated memory was 90.2 MB in the beginning and 6.6 GB in the end (delta: 6.5 GB). Free memory was 62.3 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,763 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 90.2 MB. Free memory is still 63.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:57:48,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 727.55 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 62.3 MB in the beginning and 71.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,763 INFO L168 Benchmark]: Boogie Procedure Inliner took 105.05 ms. Allocated memory is still 132.1 MB. Free memory was 71.6 MB in the beginning and 56.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,763 INFO L168 Benchmark]: Boogie Preprocessor took 134.94 ms. Allocated memory is still 132.1 MB. Free memory was 56.9 MB in the beginning and 87.3 MB in the end (delta: -30.4 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,763 INFO L168 Benchmark]: RCFGBuilder took 2116.35 ms. Allocated memory was 132.1 MB in the beginning and 220.2 MB in the end (delta: 88.1 MB). Free memory was 87.3 MB in the beginning and 91.8 MB in the end (delta: -4.5 MB). Peak memory consumption was 86.6 MB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,764 INFO L168 Benchmark]: TraceAbstraction took 150968.04 ms. Allocated memory was 220.2 MB in the beginning and 6.6 GB in the end (delta: 6.3 GB). Free memory was 90.8 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,764 INFO L168 Benchmark]: Witness Printer took 159.14 ms. Allocated memory is still 6.6 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-12-09 10:57:48,765 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 90.2 MB. Free memory is still 63.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 727.55 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 62.3 MB in the beginning and 71.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 105.05 ms. Allocated memory is still 132.1 MB. Free memory was 71.6 MB in the beginning and 56.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 134.94 ms. Allocated memory is still 132.1 MB. Free memory was 56.9 MB in the beginning and 87.3 MB in the end (delta: -30.4 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2116.35 ms. Allocated memory was 132.1 MB in the beginning and 220.2 MB in the end (delta: 88.1 MB). Free memory was 87.3 MB in the beginning and 91.8 MB in the end (delta: -4.5 MB). Peak memory consumption was 86.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 150968.04 ms. Allocated memory was 220.2 MB in the beginning and 6.6 GB in the end (delta: 6.3 GB). Free memory was 90.8 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.1 GB. * Witness Printer took 159.14 ms. Allocated memory is still 6.6 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1600]: 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: 1662]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1668]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((a5 == 1 && a16 == 1) && a22 == 1) && a26 == 1) && a11 == 1) && a15 == 1) && a29 == 1) || ((((((a5 == 1 && a26 <= 0) && a16 == 1) && a22 == 1) && !(a27 == 1)) && !(a11 == 1)) && a3 <= 0)) || (((((a5 == 1 && a27 == 1) && a26 == 1) && a6 == 1) && a15 == 1) && a3 <= 1)) || (((((a5 == 1 && a16 == 1) && a22 == 1) && !(a6 == 1)) && !(a11 == 1)) && a3 <= 1)) || (((((a5 == 1 && a26 == 1) && !(a11 == 1)) && a15 == 1) && a6 == 1) && a3 <= 0)) || (((((a5 == 1 && a27 == 1) && a26 == 1) && a6 == 1) && a3 <= 1) && (((((a12 == 1 && a27 == 1) && a26 == 1) && a11 == 1) && !(a7 == 1)) || (a7 == 1 && a6 == 1)))) || ((((a11 <= 0 && a5 == 1) && a26 <= 0) && a6 <= 0) && a3 <= 0)) || (((((((a5 == 1 && a27 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && 2 == a3) && a15 == 1) && (a26 == 1 || a6 == 1))) || (((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && a11 == 1) && a6 <= 0)) || (((((a5 == 1 && a27 == 1) && !(a6 == 1)) && !(a11 == 1)) && a15 == 1) && a3 <= 0)) || ((((((a5 == 1 && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && a26 == 1) && !(a11 == 1)) && a6 == 1)) || (((((a12 == 1 && a5 == 1) && a16 == 1) && a26 == 1) && !(a6 == 1)) && a3 <= 0)) || ((((a5 == 1 && ((a6 == 0 && a26 == 1) || (a26 == 0 && a6 == 1))) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1)) || (((((a12 == 1 && a5 == 1) && a26 == 1) && !(a11 == 1)) && a15 == 1) && a3 <= 0)) || (((((a26 <= 0 && a5 == 1) && !(a11 == 1)) && a15 == 1) && a6 <= 0) && a3 <= 0)) || ((((a5 == 1 && a27 == 1) && a26 == 1) && a6 == 1) && a3 <= 0)) || (((((a5 == 1 && a26 == 1) && !(a11 == 1)) && a6 == 1) && a29 == 1) && a3 <= 0)) || ((((a12 == 1 && a11 <= 0) && a5 == 1) && a26 == 1) && a3 <= 0)) || (((((((a12 == 1 && a5 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && !(a11 == 1))) || ((((((a5 == 1 && ((a6 == 0 && a8 == 1) || a6 == 1)) && (a2 == 1 || a8 == 1)) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && (a27 == 1 || a6 == 1))) || ((((((a12 == 1 && a5 == 1) && a27 == 1) && a16 == 1) && a22 == 1) && a15 == 1) && a3 <= 0)) || ((((((a5 == 1 && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && a11 == 1) && a6 == 1)) || ((((a11 <= 0 && a5 == 1) && a26 == 1) && a6 == 1) && a3 <= 0)) || (((((a5 == 1 && a16 == 1) && a22 == 1) && 2 == a3) && a29 == 1) && (((((a12 == 1 && a27 == 1) && a26 == 1) && a11 == 1) && !(a7 == 1)) || (a7 == 1 && a6 == 1)))) || ((((((a5 == 1 && a27 == 1) && (a2 == 1 || a8 == 1)) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a26 == 1) && a6 == 1) && a3 <= 1)) || (((((((a5 == 1 && a16 == 1) && a26 == 1) && !(a6 == 1)) && (a27 == 1 || a6 == 1)) && a15 == 1) && a11 == 1) && a3 <= 1)) || (((((((a12 == 1 && a11 <= 0) && a5 == 1) && ((a6 == 0 && a26 == 1) || (a26 == 0 && a6 == 1))) && (a27 == 1 || a6 == 1)) && a29 == 1) && a3 <= 1) && a6 <= 0)) || (((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && !(a6 == 1)) && a3 <= 1)) || ((((((a12 == 1 && a5 == 1) && a27 == 1) && a26 == 1) && a11 == 1) && a3 <= 1) && a6 <= 0)) || (((((((a5 == 1 && !(a26 == 1)) && a27 == 1) && ((a6 == 0 && a8 == 1) || a6 == 1)) && a16 == 1) && a22 == 1) && a15 == 1) && a29 == 1)) || ((((((a26 <= 0 && a5 == 1) && a27 == 1) && !(a6 == 1)) && !(a11 == 1)) && a29 == 1) && a3 <= 0)) || ((((((a5 == 1 && a27 == 1) && a16 == 1) && a26 == 1) && !(a6 == 1)) && a11 == 1) && a3 <= 0)) || ((((a12 == 1 && a5 == 1) && a27 == 1) && a26 == 1) && a3 <= 0)) || (((((((a12 == 1 && a5 == 1) && a27 == 1) && a16 == 1) && a22 == 1) && 2 == a3) && a11 == 1) && a6 == 1)) || (((((((a5 == 1 && a27 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && !(a11 == 1)) && a3 <= 1) && a29 == 1)) || ((((((a5 == 1 && a27 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a26 == 1) && !(a11 == 1)) && a6 == 1) && a3 <= 1)) || (((((a11 <= 0 && a5 == 1) && a26 <= 0) && !(a6 == 1)) && (a27 == 1 || a6 == 1)) && a3 <= 0)) || ((((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && a11 == 1)) || ((((a5 == 1 && ((a6 == 0 && a26 == 1) || (a26 == 0 && a6 == 1))) && a16 == 1) && a22 == 1) && a3 <= 1)) || ((((a11 <= 0 && a5 == 1) && a16 == 1) && a22 == 1) && a6 == 1)) || ((((((a12 == 1 && a5 == 1) && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && a6 <= 0)) || ((((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && !(a11 == 1)) && a15 == 1) && a3 <= 0)) || ((((((a5 == 1 && a16 == 1) && a22 == 1) && a26 == 1) && a15 == 1) && a6 == 1) && a3 <= 1)) || (((((a11 <= 0 && a5 == 1) && a27 == 1) && a26 == 1) && a6 == 1) && a3 <= 1)) || (((((a5 == 1 && a27 == 1) && a26 <= 0) && a16 == 1) && a22 == 1) && a6 <= 0)) || ((((((a5 == 1 && a26 <= 0) && a16 == 1) && a22 == 1) && 2 == a3) && a11 == 1) && a6 <= 0) - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((a5 == 1 && a16 == 1) && a22 == 1) && a26 == 1) && a11 == 1) && a15 == 1) && a29 == 1) || ((((((a5 == 1 && a26 <= 0) && a16 == 1) && a22 == 1) && !(a27 == 1)) && !(a11 == 1)) && a3 <= 0)) || (((((a5 == 1 && a27 == 1) && a26 == 1) && a6 == 1) && a15 == 1) && a3 <= 1)) || (((((a5 == 1 && a16 == 1) && a22 == 1) && !(a6 == 1)) && !(a11 == 1)) && a3 <= 1)) || (((((a5 == 1 && a26 == 1) && !(a11 == 1)) && a15 == 1) && a6 == 1) && a3 <= 0)) || (((((a5 == 1 && a27 == 1) && a26 == 1) && a6 == 1) && a3 <= 1) && (((((a12 == 1 && a27 == 1) && a26 == 1) && a11 == 1) && !(a7 == 1)) || (a7 == 1 && a6 == 1)))) || ((((a11 <= 0 && a5 == 1) && a26 <= 0) && a6 <= 0) && a3 <= 0)) || (((((((a5 == 1 && a27 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && 2 == a3) && a15 == 1) && (a26 == 1 || a6 == 1))) || (((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && a11 == 1) && a6 <= 0)) || (((((a5 == 1 && a27 == 1) && !(a6 == 1)) && !(a11 == 1)) && a15 == 1) && a3 <= 0)) || ((((((a5 == 1 && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && a26 == 1) && !(a11 == 1)) && a6 == 1)) || (((((a12 == 1 && a5 == 1) && a16 == 1) && a26 == 1) && !(a6 == 1)) && a3 <= 0)) || ((((a5 == 1 && ((a6 == 0 && a26 == 1) || (a26 == 0 && a6 == 1))) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1)) || (((((a12 == 1 && a5 == 1) && a26 == 1) && !(a11 == 1)) && a15 == 1) && a3 <= 0)) || (((((a26 <= 0 && a5 == 1) && !(a11 == 1)) && a15 == 1) && a6 <= 0) && a3 <= 0)) || ((((a5 == 1 && a27 == 1) && a26 == 1) && a6 == 1) && a3 <= 0)) || (((((a5 == 1 && a26 == 1) && !(a11 == 1)) && a6 == 1) && a29 == 1) && a3 <= 0)) || ((((a12 == 1 && a11 <= 0) && a5 == 1) && a26 == 1) && a3 <= 0)) || (((((((a12 == 1 && a5 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && !(a11 == 1))) || ((((((a5 == 1 && ((a6 == 0 && a8 == 1) || a6 == 1)) && (a2 == 1 || a8 == 1)) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && (a27 == 1 || a6 == 1))) || ((((((a12 == 1 && a5 == 1) && a27 == 1) && a16 == 1) && a22 == 1) && a15 == 1) && a3 <= 0)) || ((((((a5 == 1 && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && a11 == 1) && a6 == 1)) || ((((a11 <= 0 && a5 == 1) && a26 == 1) && a6 == 1) && a3 <= 0)) || (((((a5 == 1 && a16 == 1) && a22 == 1) && 2 == a3) && a29 == 1) && (((((a12 == 1 && a27 == 1) && a26 == 1) && a11 == 1) && !(a7 == 1)) || (a7 == 1 && a6 == 1)))) || ((((((a5 == 1 && a27 == 1) && (a2 == 1 || a8 == 1)) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a26 == 1) && a6 == 1) && a3 <= 1)) || (((((((a5 == 1 && a16 == 1) && a26 == 1) && !(a6 == 1)) && (a27 == 1 || a6 == 1)) && a15 == 1) && a11 == 1) && a3 <= 1)) || (((((((a12 == 1 && a11 <= 0) && a5 == 1) && ((a6 == 0 && a26 == 1) || (a26 == 0 && a6 == 1))) && (a27 == 1 || a6 == 1)) && a29 == 1) && a3 <= 1) && a6 <= 0)) || (((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && !(a6 == 1)) && a3 <= 1)) || ((((((a12 == 1 && a5 == 1) && a27 == 1) && a26 == 1) && a11 == 1) && a3 <= 1) && a6 <= 0)) || (((((((a5 == 1 && !(a26 == 1)) && a27 == 1) && ((a6 == 0 && a8 == 1) || a6 == 1)) && a16 == 1) && a22 == 1) && a15 == 1) && a29 == 1)) || ((((((a26 <= 0 && a5 == 1) && a27 == 1) && !(a6 == 1)) && !(a11 == 1)) && a29 == 1) && a3 <= 0)) || ((((((a5 == 1 && a27 == 1) && a16 == 1) && a26 == 1) && !(a6 == 1)) && a11 == 1) && a3 <= 0)) || ((((a12 == 1 && a5 == 1) && a27 == 1) && a26 == 1) && a3 <= 0)) || (((((((a12 == 1 && a5 == 1) && a27 == 1) && a16 == 1) && a22 == 1) && 2 == a3) && a11 == 1) && a6 == 1)) || (((((((a5 == 1 && a27 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a16 == 1) && a22 == 1) && !(a11 == 1)) && a3 <= 1) && a29 == 1)) || ((((((a5 == 1 && a27 == 1) && ((((((!(a26 == 1) || !(a12 == 1)) || !(a6 == 1)) || !(a27 == 1)) || a11 == 1) && (((a12 == 1 || a27 == 1) || !(a11 == 1)) || a6 == 1)) || a7 == 1)) && a26 == 1) && !(a11 == 1)) && a6 == 1) && a3 <= 1)) || (((((a11 <= 0 && a5 == 1) && a26 <= 0) && !(a6 == 1)) && (a27 == 1 || a6 == 1)) && a3 <= 0)) || ((((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && a11 == 1)) || ((((a5 == 1 && ((a6 == 0 && a26 == 1) || (a26 == 0 && a6 == 1))) && a16 == 1) && a22 == 1) && a3 <= 1)) || ((((a11 <= 0 && a5 == 1) && a16 == 1) && a22 == 1) && a6 == 1)) || ((((((a12 == 1 && a5 == 1) && a16 == 1) && a22 == 1) && a26 == 1) && 2 == a3) && a6 <= 0)) || ((((((a5 == 1 && a27 == 1) && a16 == 1) && a22 == 1) && !(a11 == 1)) && a15 == 1) && a3 <= 0)) || ((((((a5 == 1 && a16 == 1) && a22 == 1) && a26 == 1) && a15 == 1) && a6 == 1) && a3 <= 1)) || (((((a11 <= 0 && a5 == 1) && a27 == 1) && a26 == 1) && a6 == 1) && a3 <= 1)) || (((((a5 == 1 && a27 == 1) && a26 <= 0) && a16 == 1) && a22 == 1) && a6 <= 0)) || ((((((a5 == 1 && a26 <= 0) && a16 == 1) && a22 == 1) && 2 == a3) && a11 == 1) && a6 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 148 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 81.6s, OverallIterations: 28, TraceHistogramMax: 9, AutomataDifference: 25.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 69.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3001 SDtfs, 4704 SDslu, 785 SDs, 0 SdLazy, 17454 SolverSat, 3392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6831 GetRequests, 6748 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146435occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 14.6s AutomataMinimizationTime, 28 MinimizatonAttempts, 96968 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 2141 NumberOfFragments, 2753 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1588632 FormulaSimplificationTreeSizeReduction, 39.5s HoareSimplificationTime, 3 FomulaSimplificationsInter, 485156 FormulaSimplificationTreeSizeReductionInter, 29.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 12275 NumberOfCodeBlocks, 11768 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 15596 ConstructedInterpolants, 0 QuantifiedInterpolants, 18464305 SizeOfPredicates, 90 NumberOfNonLiveVariables, 5564 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 46 InterpolantComputations, 35 PerfectInterpolantSequences, 17610/18619 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...