./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label24.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label24.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/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 7f5e2cf5778d35276df37ef4653bf7d5a3d1b66b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:32:16,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:32:16,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:32:16,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:32:16,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:32:16,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:32:16,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:32:16,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:32:16,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:32:16,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:32:16,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:32:16,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:32:16,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:32:16,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:32:16,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:32:16,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:32:16,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:32:16,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:32:16,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:32:16,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:32:16,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:32:16,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:32:16,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:32:16,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:32:16,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:32:16,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:32:16,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:32:16,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:32:16,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:32:16,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:32:16,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:32:16,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:32:16,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:32:16,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:32:16,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:32:16,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:32:16,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:32:16,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:32:16,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:32:16,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:32:16,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:32:16,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:32:16,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:32:16,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:32:16,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:32:16,596 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:32:16,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:32:16,596 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:32:16,596 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:32:16,597 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:32:16,597 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:32:16,597 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:32:16,598 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:32:16,599 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:32:16,599 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:32:16,599 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:32:16,599 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:32:16,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:32:16,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:32:16,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:32:16,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:32:16,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:32:16,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:32:16,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:32:16,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:32:16,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:32:16,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:32:16,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:32:16,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:32:16,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:32:16,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:32:16,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:32:16,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:32:16,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:32:16,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:32:16,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:32:16,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:32:16,605 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:32:16,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:32:16,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:32:16,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:32:16,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:32:16,606 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_0a15fef7-1660-4a20-809d-be2b7a24cc48/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f5e2cf5778d35276df37ef4653bf7d5a3d1b66b [2020-11-28 07:32:16,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:32:16,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:32:16,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:32:16,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:32:16,929 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:32:16,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label24.c [2020-11-28 07:32:16,998 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/data/099f4782d/981840919f0547fcbad1e9cfec742403/FLAG906502c55 [2020-11-28 07:32:17,594 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:32:17,595 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/sv-benchmarks/c/eca-rers2012/Problem01_label24.c [2020-11-28 07:32:17,621 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/data/099f4782d/981840919f0547fcbad1e9cfec742403/FLAG906502c55 [2020-11-28 07:32:17,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/data/099f4782d/981840919f0547fcbad1e9cfec742403 [2020-11-28 07:32:17,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:32:17,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:32:17,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:32:17,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:32:17,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:32:17,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:32:17" (1/1) ... [2020-11-28 07:32:17,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f896b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:17, skipping insertion in model container [2020-11-28 07:32:17,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:32:17" (1/1) ... [2020-11-28 07:32:17,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:32:17,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:32:18,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:32:18,372 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:32:18,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:32:18,497 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:32:18,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18 WrapperNode [2020-11-28 07:32:18,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:32:18,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:32:18,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:32:18,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:32:18,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:32:18,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:32:18,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:32:18,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:32:18,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... [2020-11-28 07:32:18,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:32:18,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:32:18,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:32:18,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:32:18,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/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 [2020-11-28 07:32:18,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:32:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:32:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:32:18,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:32:21,320 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:32:21,320 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:32:21,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:32:21 BoogieIcfgContainer [2020-11-28 07:32:21,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:32:21,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:32:21,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:32:21,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:32:21,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:32:17" (1/3) ... [2020-11-28 07:32:21,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e787daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:32:21, skipping insertion in model container [2020-11-28 07:32:21,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:18" (2/3) ... [2020-11-28 07:32:21,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e787daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:32:21, skipping insertion in model container [2020-11-28 07:32:21,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:32:21" (3/3) ... [2020-11-28 07:32:21,333 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label24.c [2020-11-28 07:32:21,347 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:32:21,352 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:32:21,365 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:32:21,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:32:21,401 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:32:21,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:32:21,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:32:21,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:32:21,402 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:32:21,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:32:21,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:32:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:32:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:32:21,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:21,432 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] [2020-11-28 07:32:21,434 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1520706925, now seen corresponding path program 1 times [2020-11-28 07:32:21,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:21,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798664020] [2020-11-28 07:32:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:32:21,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798664020] [2020-11-28 07:32:21,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:21,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:32:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383042219] [2020-11-28 07:32:21,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:21,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:32:21,941 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:32:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:22,596 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:32:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:22,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:32:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:22,615 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:32:22,615 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:32:22,622 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 [2020-11-28 07:32:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:32:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:32:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:32:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:32:22,687 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:32:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:22,688 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:32:22,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:32:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:32:22,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:22,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:22,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:32:22,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1975139262, now seen corresponding path program 1 times [2020-11-28 07:32:22,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:22,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32648711] [2020-11-28 07:32:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:32:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32648711] [2020-11-28 07:32:22,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:22,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:32:22,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058622183] [2020-11-28 07:32:22,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:22,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:22,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:32:22,800 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:32:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:23,317 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:32:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:23,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:32:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:23,322 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:32:23,322 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:32:23,324 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 [2020-11-28 07:32:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:32:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:32:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:32:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-28 07:32:23,346 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-28 07:32:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:23,347 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-28 07:32:23,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-28 07:32:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:32:23,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:23,351 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-28 07:32:23,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:32:23,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1832091844, now seen corresponding path program 1 times [2020-11-28 07:32:23,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:23,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646791670] [2020-11-28 07:32:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:32:23,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646791670] [2020-11-28 07:32:23,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:23,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:32:23,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296405847] [2020-11-28 07:32:23,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:32:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:32:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:32:23,611 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-28 07:32:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:24,330 INFO L93 Difference]: Finished difference Result 713 states and 1141 transitions. [2020-11-28 07:32:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:32:24,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:32:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:24,336 INFO L225 Difference]: With dead ends: 713 [2020-11-28 07:32:24,336 INFO L226 Difference]: Without dead ends: 358 [2020-11-28 07:32:24,338 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 [2020-11-28 07:32:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-28 07:32:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-11-28 07:32:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-28 07:32:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2020-11-28 07:32:24,391 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 78 [2020-11-28 07:32:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:24,396 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2020-11-28 07:32:24,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:32:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2020-11-28 07:32:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:32:24,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:24,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:24,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:32:24,401 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1009065800, now seen corresponding path program 1 times [2020-11-28 07:32:24,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:24,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003426444] [2020-11-28 07:32:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:32:24,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003426444] [2020-11-28 07:32:24,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:24,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:32:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613973024] [2020-11-28 07:32:24,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:32:24,514 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand 3 states. [2020-11-28 07:32:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:24,884 INFO L93 Difference]: Finished difference Result 857 states and 1180 transitions. [2020-11-28 07:32:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:24,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:32:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:24,888 INFO L225 Difference]: With dead ends: 857 [2020-11-28 07:32:24,888 INFO L226 Difference]: Without dead ends: 500 [2020-11-28 07:32:24,889 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 [2020-11-28 07:32:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-11-28 07:32:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2020-11-28 07:32:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-11-28 07:32:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 649 transitions. [2020-11-28 07:32:24,909 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 649 transitions. Word has length 86 [2020-11-28 07:32:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:24,910 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 649 transitions. [2020-11-28 07:32:24,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 649 transitions. [2020-11-28 07:32:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-28 07:32:24,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:24,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:24,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:32:24,913 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1460492830, now seen corresponding path program 1 times [2020-11-28 07:32:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:24,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497652639] [2020-11-28 07:32:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:32:24,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497652639] [2020-11-28 07:32:24,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:24,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:32:24,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450249721] [2020-11-28 07:32:24,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:24,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:32:24,986 INFO L87 Difference]: Start difference. First operand 500 states and 649 transitions. Second operand 3 states. [2020-11-28 07:32:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:25,407 INFO L93 Difference]: Finished difference Result 1496 states and 1944 transitions. [2020-11-28 07:32:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:25,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-11-28 07:32:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:25,415 INFO L225 Difference]: With dead ends: 1496 [2020-11-28 07:32:25,415 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:32:25,416 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 [2020-11-28 07:32:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:32:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2020-11-28 07:32:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:32:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1029 transitions. [2020-11-28 07:32:25,454 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1029 transitions. Word has length 95 [2020-11-28 07:32:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:25,455 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1029 transitions. [2020-11-28 07:32:25,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1029 transitions. [2020-11-28 07:32:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-28 07:32:25,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:25,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-11-28 07:32:25,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:32:25,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1655716783, now seen corresponding path program 1 times [2020-11-28 07:32:25,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:25,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139783985] [2020-11-28 07:32:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:32:25,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139783985] [2020-11-28 07:32:25,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:25,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:32:25,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161880658] [2020-11-28 07:32:25,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:32:25,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:32:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:32:25,614 INFO L87 Difference]: Start difference. First operand 784 states and 1029 transitions. Second operand 4 states. [2020-11-28 07:32:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:26,330 INFO L93 Difference]: Finished difference Result 1709 states and 2278 transitions. [2020-11-28 07:32:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:32:26,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-11-28 07:32:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:26,339 INFO L225 Difference]: With dead ends: 1709 [2020-11-28 07:32:26,339 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:32:26,341 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 [2020-11-28 07:32:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:32:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2020-11-28 07:32:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:32:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1184 transitions. [2020-11-28 07:32:26,378 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1184 transitions. Word has length 101 [2020-11-28 07:32:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:26,379 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1184 transitions. [2020-11-28 07:32:26,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:32:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1184 transitions. [2020-11-28 07:32:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-28 07:32:26,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:26,388 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:32:26,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:32:26,388 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash 224018260, now seen corresponding path program 1 times [2020-11-28 07:32:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:26,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714830837] [2020-11-28 07:32:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:32:26,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714830837] [2020-11-28 07:32:26,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:26,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:32:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897422000] [2020-11-28 07:32:26,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:32:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:32:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:32:26,537 INFO L87 Difference]: Start difference. First operand 926 states and 1184 transitions. Second operand 4 states. [2020-11-28 07:32:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:27,217 INFO L93 Difference]: Finished difference Result 2206 states and 2814 transitions. [2020-11-28 07:32:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:32:27,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-11-28 07:32:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:27,225 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:32:27,226 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:32:27,228 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 [2020-11-28 07:32:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:32:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-11-28 07:32:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:32:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1513 transitions. [2020-11-28 07:32:27,263 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1513 transitions. Word has length 115 [2020-11-28 07:32:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:27,263 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1513 transitions. [2020-11-28 07:32:27,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:32:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1513 transitions. [2020-11-28 07:32:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-28 07:32:27,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:27,266 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:32:27,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:32:27,267 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1209423527, now seen corresponding path program 1 times [2020-11-28 07:32:27,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:27,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49722897] [2020-11-28 07:32:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:32:27,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49722897] [2020-11-28 07:32:27,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412004709] [2020-11-28 07:32:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/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 [2020-11-28 07:32:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:27,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:32:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:32:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 07:32:27,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:32:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 07:32:27,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:32:27,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:32:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95590220] [2020-11-28 07:32:27,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:27,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:27,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:32:27,923 INFO L87 Difference]: Start difference. First operand 1210 states and 1513 transitions. Second operand 3 states. [2020-11-28 07:32:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:28,349 INFO L93 Difference]: Finished difference Result 2419 states and 3025 transitions. [2020-11-28 07:32:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:28,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-11-28 07:32:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:28,360 INFO L225 Difference]: With dead ends: 2419 [2020-11-28 07:32:28,360 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:32:28,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:32:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:32:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2020-11-28 07:32:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:32:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1290 transitions. [2020-11-28 07:32:28,403 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1290 transitions. Word has length 132 [2020-11-28 07:32:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:28,405 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1290 transitions. [2020-11-28 07:32:28,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1290 transitions. [2020-11-28 07:32:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-28 07:32:28,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:28,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:28,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-28 07:32:28,634 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash -175186045, now seen corresponding path program 1 times [2020-11-28 07:32:28,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:28,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418946568] [2020-11-28 07:32:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:32:28,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418946568] [2020-11-28 07:32:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829215875] [2020-11-28 07:32:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/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 [2020-11-28 07:32:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:28,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:32:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:32:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-28 07:32:29,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:32:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-28 07:32:29,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:32:29,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:32:29,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79748644] [2020-11-28 07:32:29,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:29,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:29,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:32:29,223 INFO L87 Difference]: Start difference. First operand 1068 states and 1290 transitions. Second operand 3 states. [2020-11-28 07:32:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:29,640 INFO L93 Difference]: Finished difference Result 2206 states and 2674 transitions. [2020-11-28 07:32:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:29,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-11-28 07:32:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:29,647 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:32:29,647 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:32:29,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:32:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:32:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:32:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:32:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1334 transitions. [2020-11-28 07:32:29,678 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1334 transitions. Word has length 148 [2020-11-28 07:32:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:29,678 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1334 transitions. [2020-11-28 07:32:29,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1334 transitions. [2020-11-28 07:32:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-28 07:32:29,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:29,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:29,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:32:29,899 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash -113060111, now seen corresponding path program 1 times [2020-11-28 07:32:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:29,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026471247] [2020-11-28 07:32:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:32:30,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026471247] [2020-11-28 07:32:30,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:30,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:32:30,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992312860] [2020-11-28 07:32:30,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:32:30,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:30,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:32:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:32:30,071 INFO L87 Difference]: Start difference. First operand 1139 states and 1334 transitions. Second operand 4 states. [2020-11-28 07:32:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:30,687 INFO L93 Difference]: Finished difference Result 2490 states and 2900 transitions. [2020-11-28 07:32:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:32:30,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-11-28 07:32:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:30,695 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:32:30,695 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:32:30,697 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 [2020-11-28 07:32:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:32:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2020-11-28 07:32:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:32:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1322 transitions. [2020-11-28 07:32:30,727 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1322 transitions. Word has length 151 [2020-11-28 07:32:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:30,728 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1322 transitions. [2020-11-28 07:32:30,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:32:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1322 transitions. [2020-11-28 07:32:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-28 07:32:30,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:30,732 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:30,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:32:30,732 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:30,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2024914807, now seen corresponding path program 1 times [2020-11-28 07:32:30,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:30,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274935039] [2020-11-28 07:32:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-28 07:32:30,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274935039] [2020-11-28 07:32:30,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:30,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:32:30,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742314385] [2020-11-28 07:32:30,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:30,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:30,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:30,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:32:30,844 INFO L87 Difference]: Start difference. First operand 1139 states and 1322 transitions. Second operand 3 states. [2020-11-28 07:32:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:31,305 INFO L93 Difference]: Finished difference Result 2561 states and 2971 transitions. [2020-11-28 07:32:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:31,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-28 07:32:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:31,314 INFO L225 Difference]: With dead ends: 2561 [2020-11-28 07:32:31,314 INFO L226 Difference]: Without dead ends: 1423 [2020-11-28 07:32:31,316 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 [2020-11-28 07:32:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-28 07:32:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1352. [2020-11-28 07:32:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-11-28 07:32:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1533 transitions. [2020-11-28 07:32:31,349 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1533 transitions. Word has length 194 [2020-11-28 07:32:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:31,349 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1533 transitions. [2020-11-28 07:32:31,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1533 transitions. [2020-11-28 07:32:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-28 07:32:31,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:31,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:31,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:32:31,355 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 413832466, now seen corresponding path program 1 times [2020-11-28 07:32:31,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:31,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879661819] [2020-11-28 07:32:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-28 07:32:31,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879661819] [2020-11-28 07:32:31,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365930272] [2020-11-28 07:32:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/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 [2020-11-28 07:32:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:31,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:32:31,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:32:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:32:32,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:32:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:32:32,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:32:32,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:32:32,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204290387] [2020-11-28 07:32:32,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:32,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:32,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:32,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:32:32,181 INFO L87 Difference]: Start difference. First operand 1352 states and 1533 transitions. Second operand 3 states. [2020-11-28 07:32:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:32,641 INFO L93 Difference]: Finished difference Result 3058 states and 3474 transitions. [2020-11-28 07:32:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:32,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-28 07:32:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:32,648 INFO L225 Difference]: With dead ends: 3058 [2020-11-28 07:32:32,648 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:32:32,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:32:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:32:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1352. [2020-11-28 07:32:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-11-28 07:32:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1494 transitions. [2020-11-28 07:32:32,682 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1494 transitions. Word has length 216 [2020-11-28 07:32:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:32,682 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1494 transitions. [2020-11-28 07:32:32,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1494 transitions. [2020-11-28 07:32:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-28 07:32:32,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:32,688 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:32:32,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:32:32,902 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash 237441718, now seen corresponding path program 1 times [2020-11-28 07:32:32,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:32,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076320704] [2020-11-28 07:32:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 286 proven. 68 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-28 07:32:33,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076320704] [2020-11-28 07:32:33,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982044261] [2020-11-28 07:32:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/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 [2020-11-28 07:32:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:33,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:32:33,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:32:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-11-28 07:32:33,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:32:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-11-28 07:32:33,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:32:33,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:32:33,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43230440] [2020-11-28 07:32:33,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:33,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:32:33,437 INFO L87 Difference]: Start difference. First operand 1352 states and 1494 transitions. Second operand 3 states. [2020-11-28 07:32:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:33,778 INFO L93 Difference]: Finished difference Result 2701 states and 2997 transitions. [2020-11-28 07:32:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:33,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2020-11-28 07:32:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:33,779 INFO L225 Difference]: With dead ends: 2701 [2020-11-28 07:32:33,780 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:32:33,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:32:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:32:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:32:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:32:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:32:33,784 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 245 [2020-11-28 07:32:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:33,784 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:32:33,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:32:33,785 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:32:33,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:32:33,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:32:34,420 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-11-28 07:32:34,665 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-11-28 07:32:34,667 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:32:34,667 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:32:34,667 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:32:34,667 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:32:34,667 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:32:34,667 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:32:34,668 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L476-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:32:34,669 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:32:34,670 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:32:34,670 INFO L274 CegarLoopResult]: For program point L479-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L480(line 480) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:32:34,671 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:32:34,672 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:32:34,672 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:32:34,672 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:32:34,672 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:32:34,672 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:32:34,672 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:32:34,673 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (= ~a16~0 6)) (.cse7 (= ~a20~0 1)) (.cse8 (<= ~a8~0 14)) (.cse2 (<= ~a17~0 0)) (.cse0 (= ~a21~0 1)) (.cse4 (<= ~a16~0 5)) (.cse6 (= ~a17~0 1)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and (let ((.cse5 (<= ~a21~0 0))) (or (and .cse4 .cse5 .cse6) (and .cse7 .cse5))) .cse8) (and .cse8 .cse0 .cse7) (and .cse0 (= ~a12~0 8) (<= ~a7~0 0) .cse7 .cse6) (and .cse0 .cse1 .cse6 .cse3) (and .cse0 .cse2 .cse7) (and .cse8 .cse0 .cse4 .cse3) (and .cse0 .cse4 .cse2 .cse3) (and .cse0 .cse4 .cse6 .cse3))) [2020-11-28 07:32:34,673 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:32:34,673 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:32:34,673 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:32:34,673 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:32:34,674 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:32:34,674 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:32:34,674 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:32:34,674 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:32:34,674 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:32:34,674 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:32:34,675 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:32:34,676 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:32:34,676 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:32:34,676 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:32:34,676 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:32:34,676 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:32:34,676 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:32:34,677 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (= ~a16~0 6)) (.cse7 (= ~a20~0 1)) (.cse8 (<= ~a8~0 14)) (.cse2 (<= ~a17~0 0)) (.cse0 (= ~a21~0 1)) (.cse4 (<= ~a16~0 5)) (.cse6 (= ~a17~0 1)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and (let ((.cse5 (<= ~a21~0 0))) (or (and .cse4 .cse5 .cse6) (and .cse7 .cse5))) .cse8) (and .cse8 .cse0 .cse7) (and .cse0 (= ~a12~0 8) (<= ~a7~0 0) .cse7 .cse6) (and .cse0 .cse1 .cse6 .cse3) (and .cse0 .cse2 .cse7) (and .cse8 .cse0 .cse4 .cse3) (and .cse0 .cse4 .cse2 .cse3) (and .cse0 .cse4 .cse6 .cse3))) [2020-11-28 07:32:34,677 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:32:34,677 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:32:34,677 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:32:34,677 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:32:34,677 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:32:34,678 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:32:34,678 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:32:34,678 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:32:34,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:32:34 BoogieIcfgContainer [2020-11-28 07:32:34,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:32:34,698 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:32:34,698 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:32:34,698 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:32:34,699 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:32:21" (3/4) ... [2020-11-28 07:32:34,702 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:32:34,727 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:32:34,729 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-28 07:32:34,731 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 07:32:34,733 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:32:34,888 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0a15fef7-1660-4a20-809d-be2b7a24cc48/bin/utaipan/witness.graphml [2020-11-28 07:32:34,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:32:34,890 INFO L168 Benchmark]: Toolchain (without parser) took 17065.79 ms. Allocated memory was 102.8 MB in the beginning and 377.5 MB in the end (delta: 274.7 MB). Free memory was 67.0 MB in the beginning and 193.8 MB in the end (delta: -126.8 MB). Peak memory consumption was 147.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,890 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 73.4 MB. Free memory was 48.1 MB in the beginning and 48.1 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:32:34,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.86 ms. Allocated memory is still 102.8 MB. Free memory was 66.8 MB in the beginning and 63.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.56 ms. Allocated memory is still 102.8 MB. Free memory was 63.4 MB in the beginning and 57.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,892 INFO L168 Benchmark]: Boogie Preprocessor took 64.90 ms. Allocated memory is still 102.8 MB. Free memory was 57.8 MB in the beginning and 53.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,892 INFO L168 Benchmark]: RCFGBuilder took 2648.49 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 53.2 MB in the beginning and 57.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,893 INFO L168 Benchmark]: TraceAbstraction took 13373.71 ms. Allocated memory was 140.5 MB in the beginning and 377.5 MB in the end (delta: 237.0 MB). Free memory was 56.6 MB in the beginning and 209.7 MB in the end (delta: -153.1 MB). Peak memory consumption was 82.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,893 INFO L168 Benchmark]: Witness Printer took 190.87 ms. Allocated memory is still 377.5 MB. Free memory was 209.7 MB in the beginning and 193.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:34,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 73.4 MB. Free memory was 48.1 MB in the beginning and 48.1 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 673.86 ms. Allocated memory is still 102.8 MB. Free memory was 66.8 MB in the beginning and 63.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.56 ms. Allocated memory is still 102.8 MB. Free memory was 63.4 MB in the beginning and 57.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.90 ms. Allocated memory is still 102.8 MB. Free memory was 57.8 MB in the beginning and 53.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2648.49 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 53.2 MB in the beginning and 57.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13373.71 ms. Allocated memory was 140.5 MB in the beginning and 377.5 MB in the end (delta: 237.0 MB). Free memory was 56.6 MB in the beginning and 209.7 MB in the end (delta: -153.1 MB). Peak memory consumption was 82.9 MB. Max. memory is 16.1 GB. * Witness Printer took 190.87 ms. Allocated memory is still 377.5 MB. Free memory was 209.7 MB in the beginning and 193.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && a16 == 6) && a17 <= 0) && a20 <= 0) || ((((a16 <= 5 && a21 <= 0) && a17 == 1) || (a20 == 1 && a21 <= 0)) && a8 <= 14)) || ((a8 <= 14 && a21 == 1) && a20 == 1)) || ((((a21 == 1 && a12 == 8) && a7 <= 0) && a20 == 1) && a17 == 1)) || (((a21 == 1 && a16 == 6) && a17 == 1) && a20 <= 0)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a16 <= 5) && a17 <= 0) && a20 <= 0)) || (((a21 == 1 && a16 <= 5) && a17 == 1) && a20 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && a16 == 6) && a17 <= 0) && a20 <= 0) || ((((a16 <= 5 && a21 <= 0) && a17 == 1) || (a20 == 1 && a21 <= 0)) && a8 <= 14)) || ((a8 <= 14 && a21 == 1) && a20 == 1)) || ((((a21 == 1 && a12 == 8) && a7 <= 0) && a20 == 1) && a17 == 1)) || (((a21 == 1 && a16 == 6) && a17 == 1) && a20 <= 0)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a16 <= 5) && a17 <= 0) && a20 <= 0)) || (((a21 == 1 && a16 <= 5) && a17 == 1) && a20 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.6s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 773 SDtfs, 978 SDslu, 59 SDs, 0 SdLazy, 2939 SolverSat, 686 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1516 GetRequests, 1486 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1352occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 710 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 57 NumberOfFragments, 249 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2420 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 484 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 2450 NumberOfCodeBlocks, 2450 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3170 ConstructedInterpolants, 0 QuantifiedInterpolants, 1622139 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1698 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 21 InterpolantComputations, 17 PerfectInterpolantSequences, 3027/3203 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...