./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label39.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_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label39.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/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 b35ebac14d675485534a7c769439016d2f7efb28 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:29:29,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:29:29,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:29:29,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:29:29,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:29:29,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:29:29,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:29:29,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:29:29,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:29:29,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:29:29,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:29:29,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:29:29,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:29:29,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:29:29,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:29:29,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:29:29,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:29:29,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:29:29,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:29:29,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:29:29,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:29:29,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:29:29,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:29:29,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:29:29,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:29:29,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:29:29,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:29:29,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:29:29,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:29:29,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:29:29,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:29:29,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:29:29,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:29:29,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:29:29,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:29:29,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:29:29,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:29:29,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:29:29,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:29:29,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:29:29,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:29:29,429 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:29:29,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:29:29,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:29:29,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:29:29,454 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:29:29,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:29:29,455 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:29:29,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:29:29,455 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:29:29,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:29:29,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:29:29,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:29:29,456 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:29:29,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:29:29,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:29:29,456 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:29:29,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:29:29,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:29:29,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:29:29,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:29:29,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:29:29,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:29:29,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:29:29,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:29:29,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:29:29,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:29:29,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:29:29,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:29:29,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:29:29,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:29:29,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:29:29,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:29:29,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:29:29,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:29:29,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:29:29,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:29:29,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:29:29,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:29:29,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:29:29,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:29:29,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:29:29,462 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_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b35ebac14d675485534a7c769439016d2f7efb28 [2020-11-28 07:29:29,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:29:29,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:29:29,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:29:29,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:29:29,758 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:29:29,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label39.c [2020-11-28 07:29:29,835 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/data/5077f8350/516b28a8eb5f4853b594196a31484947/FLAG06592c3a1 [2020-11-28 07:29:30,413 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:29:30,413 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/sv-benchmarks/c/eca-rers2012/Problem01_label39.c [2020-11-28 07:29:30,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/data/5077f8350/516b28a8eb5f4853b594196a31484947/FLAG06592c3a1 [2020-11-28 07:29:30,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/data/5077f8350/516b28a8eb5f4853b594196a31484947 [2020-11-28 07:29:30,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:29:30,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:29:30,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:30,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:29:30,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:29:30,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:30" (1/1) ... [2020-11-28 07:29:30,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596032bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:30, skipping insertion in model container [2020-11-28 07:29:30,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:30" (1/1) ... [2020-11-28 07:29:30,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:29:30,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:29:31,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:31,201 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:29:31,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:31,314 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:29:31,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31 WrapperNode [2020-11-28 07:29:31,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:31,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:31,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:29:31,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:29:31,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:31,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:29:31,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:29:31,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:29:31,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... [2020-11-28 07:29:31,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:29:31,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:29:31,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:29:31,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:29:31,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/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 07:29:31,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:29:31,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:29:31,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:29:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:29:33,864 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:29:33,865 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:29:33,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:33 BoogieIcfgContainer [2020-11-28 07:29:33,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:29:33,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:29:33,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:29:33,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:29:33,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:29:30" (1/3) ... [2020-11-28 07:29:33,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226476f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:33, skipping insertion in model container [2020-11-28 07:29:33,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:31" (2/3) ... [2020-11-28 07:29:33,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226476f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:33, skipping insertion in model container [2020-11-28 07:29:33,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:33" (3/3) ... [2020-11-28 07:29:33,882 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label39.c [2020-11-28 07:29:33,897 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:29:33,902 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:29:33,915 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:29:33,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:29:33,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:29:33,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:29:33,954 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:29:33,954 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:29:33,954 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:29:33,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:29:33,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:29:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:29:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:29:33,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:33,985 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 07:29:33,987 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1520715629, now seen corresponding path program 1 times [2020-11-28 07:29:34,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:34,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625993944] [2020-11-28 07:29:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:34,467 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 07:29:34,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625993944] [2020-11-28 07:29:34,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:34,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179950240] [2020-11-28 07:29:34,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:34,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:34,493 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:29:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:35,189 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:29:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:35,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:29:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:35,213 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:29:35,214 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:29:35,219 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 07:29:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:29:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:29:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:29:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:29:35,302 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:29:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:35,304 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:29:35,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:29:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 07:29:35,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:35,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:35,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:29:35,311 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1350080319, now seen corresponding path program 1 times [2020-11-28 07:29:35,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:35,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928893862] [2020-11-28 07:29:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:35,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928893862] [2020-11-28 07:29:35,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:35,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:35,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741385447] [2020-11-28 07:29:35,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:35,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:35,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:35,400 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:29:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:36,002 INFO L93 Difference]: Finished difference Result 433 states and 775 transitions. [2020-11-28 07:29:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:36,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-28 07:29:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:36,006 INFO L225 Difference]: With dead ends: 433 [2020-11-28 07:29:36,006 INFO L226 Difference]: Without dead ends: 289 [2020-11-28 07:29:36,008 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 07:29:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-28 07:29:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-11-28 07:29:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:29:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 480 transitions. [2020-11-28 07:29:36,028 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 480 transitions. Word has length 76 [2020-11-28 07:29:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:36,028 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 480 transitions. [2020-11-28 07:29:36,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 480 transitions. [2020-11-28 07:29:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-28 07:29:36,031 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:36,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:36,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:29:36,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1761100361, now seen corresponding path program 1 times [2020-11-28 07:29:36,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:36,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961080208] [2020-11-28 07:29:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961080208] [2020-11-28 07:29:36,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:36,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:36,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682609940] [2020-11-28 07:29:36,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:36,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:36,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:36,134 INFO L87 Difference]: Start difference. First operand 287 states and 480 transitions. Second operand 3 states. [2020-11-28 07:29:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:36,650 INFO L93 Difference]: Finished difference Result 857 states and 1437 transitions. [2020-11-28 07:29:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:36,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-28 07:29:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:36,656 INFO L225 Difference]: With dead ends: 857 [2020-11-28 07:29:36,656 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 07:29:36,658 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 07:29:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 07:29:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-28 07:29:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:29:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 886 transitions. [2020-11-28 07:29:36,690 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 886 transitions. Word has length 80 [2020-11-28 07:29:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:36,690 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 886 transitions. [2020-11-28 07:29:36,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 886 transitions. [2020-11-28 07:29:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:29:36,696 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:36,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 07:29:36,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:29:36,696 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1863722926, now seen corresponding path program 1 times [2020-11-28 07:29:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:36,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606685981] [2020-11-28 07:29:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:36,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606685981] [2020-11-28 07:29:36,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:36,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895913986] [2020-11-28 07:29:36,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:29:36,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:36,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:29:36,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:36,779 INFO L87 Difference]: Start difference. First operand 571 states and 886 transitions. Second operand 4 states. [2020-11-28 07:29:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:37,523 INFO L93 Difference]: Finished difference Result 1425 states and 2187 transitions. [2020-11-28 07:29:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:29:37,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:29:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:37,529 INFO L225 Difference]: With dead ends: 1425 [2020-11-28 07:29:37,529 INFO L226 Difference]: Without dead ends: 855 [2020-11-28 07:29:37,533 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 07:29:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-11-28 07:29:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2020-11-28 07:29:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:29:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1058 transitions. [2020-11-28 07:29:37,572 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1058 transitions. Word has length 83 [2020-11-28 07:29:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:37,574 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1058 transitions. [2020-11-28 07:29:37,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:29:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1058 transitions. [2020-11-28 07:29:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-28 07:29:37,585 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:37,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:37,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:29:37,586 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:37,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1450808387, now seen corresponding path program 1 times [2020-11-28 07:29:37,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:37,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350383783] [2020-11-28 07:29:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:37,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350383783] [2020-11-28 07:29:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388173134] [2020-11-28 07:29:37,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:37,687 INFO L87 Difference]: Start difference. First operand 713 states and 1058 transitions. Second operand 3 states. [2020-11-28 07:29:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:38,255 INFO L93 Difference]: Finished difference Result 1922 states and 2892 transitions. [2020-11-28 07:29:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:38,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-28 07:29:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:38,264 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:29:38,264 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:29:38,265 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 07:29:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:29:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2020-11-28 07:29:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:29:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1512 transitions. [2020-11-28 07:29:38,300 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1512 transitions. Word has length 84 [2020-11-28 07:29:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:38,300 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1512 transitions. [2020-11-28 07:29:38,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1512 transitions. [2020-11-28 07:29:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-28 07:29:38,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:38,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:38,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:29:38,304 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1090233005, now seen corresponding path program 1 times [2020-11-28 07:29:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:38,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285000902] [2020-11-28 07:29:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:38,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285000902] [2020-11-28 07:29:38,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:38,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:38,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687651966] [2020-11-28 07:29:38,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:38,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:38,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:38,394 INFO L87 Difference]: Start difference. First operand 997 states and 1512 transitions. Second operand 3 states. [2020-11-28 07:29:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:38,892 INFO L93 Difference]: Finished difference Result 2206 states and 3309 transitions. [2020-11-28 07:29:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:38,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-28 07:29:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:38,901 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:29:38,901 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:29:38,906 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 07:29:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:29:38,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2020-11-28 07:29:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:29:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1744 transitions. [2020-11-28 07:29:38,947 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1744 transitions. Word has length 84 [2020-11-28 07:29:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:38,948 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1744 transitions. [2020-11-28 07:29:38,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1744 transitions. [2020-11-28 07:29:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:29:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:38,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:38,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:29:38,958 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash 228748072, now seen corresponding path program 1 times [2020-11-28 07:29:38,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:38,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095044879] [2020-11-28 07:29:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:39,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095044879] [2020-11-28 07:29:39,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:39,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487052335] [2020-11-28 07:29:39,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:39,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:39,084 INFO L87 Difference]: Start difference. First operand 1210 states and 1744 transitions. Second operand 3 states. [2020-11-28 07:29:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:39,541 INFO L93 Difference]: Finished difference Result 2490 states and 3576 transitions. [2020-11-28 07:29:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:39,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:29:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:39,549 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:29:39,549 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:29:39,551 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 07:29:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:29:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:29:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:29:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1482 transitions. [2020-11-28 07:29:39,586 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1482 transitions. Word has length 86 [2020-11-28 07:29:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:39,587 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1482 transitions. [2020-11-28 07:29:39,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1482 transitions. [2020-11-28 07:29:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-28 07:29:39,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:39,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:39,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:29:39,591 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:39,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2026364339, now seen corresponding path program 1 times [2020-11-28 07:29:39,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:39,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015631003] [2020-11-28 07:29:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:29:39,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015631003] [2020-11-28 07:29:39,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:39,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761003972] [2020-11-28 07:29:39,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:39,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:39,699 INFO L87 Difference]: Start difference. First operand 1139 states and 1482 transitions. Second operand 3 states. [2020-11-28 07:29:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:40,081 INFO L93 Difference]: Finished difference Result 2348 states and 3049 transitions. [2020-11-28 07:29:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:40,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-11-28 07:29:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:40,089 INFO L225 Difference]: With dead ends: 2348 [2020-11-28 07:29:40,089 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:29:40,091 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 07:29:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:29:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2020-11-28 07:29:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:29:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1498 transitions. [2020-11-28 07:29:40,125 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1498 transitions. Word has length 88 [2020-11-28 07:29:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:40,126 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1498 transitions. [2020-11-28 07:29:40,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1498 transitions. [2020-11-28 07:29:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-28 07:29:40,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:40,129 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:40,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:29:40,129 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:40,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2092172114, now seen corresponding path program 1 times [2020-11-28 07:29:40,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:40,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5541617] [2020-11-28 07:29:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:40,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5541617] [2020-11-28 07:29:40,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:40,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:40,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581766061] [2020-11-28 07:29:40,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:29:40,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:29:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:40,190 INFO L87 Difference]: Start difference. First operand 1210 states and 1498 transitions. Second operand 4 states. [2020-11-28 07:29:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:40,741 INFO L93 Difference]: Finished difference Result 2419 states and 2995 transitions. [2020-11-28 07:29:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:29:40,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-28 07:29:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:40,751 INFO L225 Difference]: With dead ends: 2419 [2020-11-28 07:29:40,752 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:29:40,754 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 07:29:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:29:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2020-11-28 07:29:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:29:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1477 transitions. [2020-11-28 07:29:40,787 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1477 transitions. Word has length 90 [2020-11-28 07:29:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:40,787 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1477 transitions. [2020-11-28 07:29:40,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:29:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1477 transitions. [2020-11-28 07:29:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-28 07:29:40,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:40,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:40,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:29:40,794 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1737633679, now seen corresponding path program 1 times [2020-11-28 07:29:40,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:40,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293840249] [2020-11-28 07:29:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 07:29:40,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293840249] [2020-11-28 07:29:40,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:40,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:40,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494730097] [2020-11-28 07:29:40,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:40,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:40,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:40,961 INFO L87 Difference]: Start difference. First operand 1210 states and 1477 transitions. Second operand 3 states. [2020-11-28 07:29:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:41,365 INFO L93 Difference]: Finished difference Result 2774 states and 3400 transitions. [2020-11-28 07:29:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:41,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-11-28 07:29:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:41,375 INFO L225 Difference]: With dead ends: 2774 [2020-11-28 07:29:41,375 INFO L226 Difference]: Without dead ends: 1565 [2020-11-28 07:29:41,377 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 07:29:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-11-28 07:29:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1494. [2020-11-28 07:29:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-11-28 07:29:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1810 transitions. [2020-11-28 07:29:41,414 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1810 transitions. Word has length 108 [2020-11-28 07:29:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:41,416 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1810 transitions. [2020-11-28 07:29:41,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1810 transitions. [2020-11-28 07:29:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-28 07:29:41,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:41,420 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 07:29:41,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:29:41,420 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:41,421 INFO L82 PathProgramCache]: Analyzing trace with hash -604138526, now seen corresponding path program 1 times [2020-11-28 07:29:41,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:41,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757862875] [2020-11-28 07:29:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757862875] [2020-11-28 07:29:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077631114] [2020-11-28 07:29:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/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 07:29:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:29:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:29:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:29:42,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:29:42,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:29:42,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023604091] [2020-11-28 07:29:42,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:42,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:29:42,024 INFO L87 Difference]: Start difference. First operand 1494 states and 1810 transitions. Second operand 3 states. [2020-11-28 07:29:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:42,527 INFO L93 Difference]: Finished difference Result 3484 states and 4286 transitions. [2020-11-28 07:29:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:42,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-11-28 07:29:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:42,540 INFO L225 Difference]: With dead ends: 3484 [2020-11-28 07:29:42,540 INFO L226 Difference]: Without dead ends: 1991 [2020-11-28 07:29:42,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 266 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 07:29:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2020-11-28 07:29:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1849. [2020-11-28 07:29:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1849 states. [2020-11-28 07:29:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2240 transitions. [2020-11-28 07:29:42,602 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2240 transitions. Word has length 134 [2020-11-28 07:29:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:42,603 INFO L481 AbstractCegarLoop]: Abstraction has 1849 states and 2240 transitions. [2020-11-28 07:29:42,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2240 transitions. [2020-11-28 07:29:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-28 07:29:42,607 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:42,608 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 07:29:42,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 07:29:42,823 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -113051407, now seen corresponding path program 1 times [2020-11-28 07:29:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:42,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964230636] [2020-11-28 07:29:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:42,973 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 07:29:42,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964230636] [2020-11-28 07:29:42,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:42,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830448230] [2020-11-28 07:29:42,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:29:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:29:42,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:42,976 INFO L87 Difference]: Start difference. First operand 1849 states and 2240 transitions. Second operand 4 states. [2020-11-28 07:29:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:43,715 INFO L93 Difference]: Finished difference Result 3910 states and 4711 transitions. [2020-11-28 07:29:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:29:43,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-11-28 07:29:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:43,730 INFO L225 Difference]: With dead ends: 3910 [2020-11-28 07:29:43,730 INFO L226 Difference]: Without dead ends: 2062 [2020-11-28 07:29:43,732 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 07:29:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-11-28 07:29:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1139. [2020-11-28 07:29:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:29:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1347 transitions. [2020-11-28 07:29:43,775 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1347 transitions. Word has length 151 [2020-11-28 07:29:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:43,776 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1347 transitions. [2020-11-28 07:29:43,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:29:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1347 transitions. [2020-11-28 07:29:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-28 07:29:43,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:43,783 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 07:29:43,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:29:43,783 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2024906103, now seen corresponding path program 1 times [2020-11-28 07:29:43,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:43,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256390986] [2020-11-28 07:29:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:43,941 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 07:29:43,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256390986] [2020-11-28 07:29:43,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:43,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:29:43,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991772251] [2020-11-28 07:29:43,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:29:43,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:43,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:29:43,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:43,943 INFO L87 Difference]: Start difference. First operand 1139 states and 1347 transitions. Second operand 4 states. [2020-11-28 07:29:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:44,497 INFO L93 Difference]: Finished difference Result 2454 states and 2881 transitions. [2020-11-28 07:29:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:29:44,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 194 [2020-11-28 07:29:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:44,504 INFO L225 Difference]: With dead ends: 2454 [2020-11-28 07:29:44,504 INFO L226 Difference]: Without dead ends: 1316 [2020-11-28 07:29:44,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:29:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2020-11-28 07:29:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1210. [2020-11-28 07:29:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:29:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1399 transitions. [2020-11-28 07:29:44,541 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1399 transitions. Word has length 194 [2020-11-28 07:29:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:44,542 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1399 transitions. [2020-11-28 07:29:44,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:29:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1399 transitions. [2020-11-28 07:29:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-28 07:29:44,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:44,546 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:44,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 07:29:44,547 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash 234231536, now seen corresponding path program 1 times [2020-11-28 07:29:44,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:44,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592384409] [2020-11-28 07:29:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-28 07:29:44,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592384409] [2020-11-28 07:29:44,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:44,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:44,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32264715] [2020-11-28 07:29:44,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:44,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:44,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:44,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:44,689 INFO L87 Difference]: Start difference. First operand 1210 states and 1399 transitions. Second operand 3 states. [2020-11-28 07:29:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:45,095 INFO L93 Difference]: Finished difference Result 2419 states and 2797 transitions. [2020-11-28 07:29:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:45,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-11-28 07:29:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:45,101 INFO L225 Difference]: With dead ends: 2419 [2020-11-28 07:29:45,101 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:29:45,104 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 07:29:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:29:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2020-11-28 07:29:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:29:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1292 transitions. [2020-11-28 07:29:45,136 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1292 transitions. Word has length 207 [2020-11-28 07:29:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:45,137 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1292 transitions. [2020-11-28 07:29:45,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1292 transitions. [2020-11-28 07:29:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-28 07:29:45,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:45,158 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 07:29:45,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 07:29:45,158 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:29:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash 413841170, now seen corresponding path program 1 times [2020-11-28 07:29:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:45,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169571583] [2020-11-28 07:29:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:45,566 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 07:29:45,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169571583] [2020-11-28 07:29:45,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606410587] [2020-11-28 07:29:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/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 07:29:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:45,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:29:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:45,812 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 07:29:45,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:45,860 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 07:29:45,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:29:45,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:29:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429569967] [2020-11-28 07:29:45,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:45,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:29:45,862 INFO L87 Difference]: Start difference. First operand 1139 states and 1292 transitions. Second operand 3 states. [2020-11-28 07:29:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:46,285 INFO L93 Difference]: Finished difference Result 1352 states and 1521 transitions. [2020-11-28 07:29:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:46,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-28 07:29:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:46,286 INFO L225 Difference]: With dead ends: 1352 [2020-11-28 07:29:46,286 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:29:46,288 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 07:29:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:29:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:29:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:29:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:29:46,289 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2020-11-28 07:29:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:46,289 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:29:46,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:46,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:29:46,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:29:46,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 07:29:46,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:29:46,620 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 59 [2020-11-28 07:29:46,916 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-11-28 07:29:47,139 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:29:47,143 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:29:47,144 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L578-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:29:47,145 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L581-1(lines 581 583) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L582(line 582) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse2 (= ~a16~0 6)) (.cse0 (<= ~a16~0 4)) (.cse5 (= ~a21~0 1)) (.cse3 (= ~a20~0 1)) (.cse6 (<= 15 ~a8~0))) (or (and .cse0 .cse1) (and .cse2 .cse3) (and .cse4 .cse3 .cse1) (and .cse5 (<= ~a7~0 0) .cse3 .cse1) (and (<= 14 ~a8~0) .cse5 .cse4) (and .cse5 .cse2 .cse6) (and .cse5 .cse0) (and .cse0 .cse3) (and .cse5 .cse3 .cse6))) [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:29:47,146 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:29:47,149 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:29:47,150 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:29:47,150 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:29:47,151 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:29:47,152 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:29:47,152 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:29:47,152 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:29:47,152 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:29:47,153 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse2 (= ~a16~0 6)) (.cse0 (<= ~a16~0 4)) (.cse5 (= ~a21~0 1)) (.cse3 (= ~a20~0 1)) (.cse6 (<= 15 ~a8~0))) (or (and .cse0 .cse1) (and .cse2 .cse3) (and .cse4 .cse3 .cse1) (and .cse5 (<= ~a7~0 0) .cse3 .cse1) (and (<= 14 ~a8~0) .cse5 .cse4) (and .cse5 .cse2 .cse6) (and .cse5 .cse0) (and .cse0 .cse3) (and .cse5 .cse3 .cse6))) [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:29:47,154 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:29:47,155 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:29:47,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:29:47 BoogieIcfgContainer [2020-11-28 07:29:47,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:29:47,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:29:47,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:29:47,201 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:29:47,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:33" (3/4) ... [2020-11-28 07:29:47,205 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:29:47,235 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:29:47,237 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:29:47,239 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:29:47,241 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:29:47,410 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2ad6cced-9a4b-4722-9872-66d1a3d5f02f/bin/utaipan/witness.graphml [2020-11-28 07:29:47,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:29:47,412 INFO L168 Benchmark]: Toolchain (without parser) took 16703.51 ms. Allocated memory was 111.1 MB in the beginning and 325.1 MB in the end (delta: 213.9 MB). Free memory was 74.1 MB in the beginning and 153.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 133.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,413 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 85.2 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:47,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 606.07 ms. Allocated memory is still 111.1 MB. Free memory was 73.9 MB in the beginning and 69.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.68 ms. Allocated memory is still 111.1 MB. Free memory was 69.3 MB in the beginning and 64.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,414 INFO L168 Benchmark]: Boogie Preprocessor took 92.37 ms. Allocated memory is still 111.1 MB. Free memory was 64.0 MB in the beginning and 59.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,414 INFO L168 Benchmark]: RCFGBuilder took 2360.84 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 59.3 MB in the beginning and 81.3 MB in the end (delta: -22.0 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,415 INFO L168 Benchmark]: TraceAbstraction took 13329.11 ms. Allocated memory was 155.2 MB in the beginning and 325.1 MB in the end (delta: 169.9 MB). Free memory was 81.3 MB in the beginning and 169.3 MB in the end (delta: -88.0 MB). Peak memory consumption was 80.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,415 INFO L168 Benchmark]: Witness Printer took 210.05 ms. Allocated memory is still 325.1 MB. Free memory was 169.3 MB in the beginning and 153.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:47,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 85.2 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 606.07 ms. Allocated memory is still 111.1 MB. Free memory was 73.9 MB in the beginning and 69.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 96.68 ms. Allocated memory is still 111.1 MB. Free memory was 69.3 MB in the beginning and 64.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.37 ms. Allocated memory is still 111.1 MB. Free memory was 64.0 MB in the beginning and 59.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2360.84 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 59.3 MB in the beginning and 81.3 MB in the end (delta: -22.0 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13329.11 ms. Allocated memory was 155.2 MB in the beginning and 325.1 MB in the end (delta: 169.9 MB). Free memory was 81.3 MB in the beginning and 169.3 MB in the end (delta: -88.0 MB). Peak memory consumption was 80.8 MB. Max. memory is 16.1 GB. * Witness Printer took 210.05 ms. Allocated memory is still 325.1 MB. Free memory was 169.3 MB in the beginning and 153.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: ((((((((a16 <= 4 && a17 == 1) || (a16 == 6 && a20 == 1)) || ((a16 <= 5 && a20 == 1) && a17 == 1)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || ((14 <= a8 && a21 == 1) && a16 <= 5)) || ((a21 == 1 && a16 == 6) && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || (a16 <= 4 && a20 == 1)) || ((a21 == 1 && a20 == 1) && 15 <= a8) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((a16 <= 4 && a17 == 1) || (a16 == 6 && a20 == 1)) || ((a16 <= 5 && a20 == 1) && a17 == 1)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || ((14 <= a8 && a21 == 1) && a16 <= 5)) || ((a21 == 1 && a16 == 6) && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || (a16 <= 4 && a20 == 1)) || ((a21 == 1 && a20 == 1) && 15 <= a8) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.5s, OverallIterations: 15, TraceHistogramMax: 6, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 725 SDtfs, 1167 SDslu, 87 SDs, 0 SdLazy, 3350 SolverSat, 872 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 738 GetRequests, 712 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 1670 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 165 HoareAnnotationTreeSize, 3 FomulaSimplifications, 4716 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 384 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 2102 NumberOfCodeBlocks, 2102 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2433 ConstructedInterpolants, 0 QuantifiedInterpolants, 1176918 SizeOfPredicates, 2 NumberOfNonLiveVariables, 845 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 19 InterpolantComputations, 17 PerfectInterpolantSequences, 1751/1850 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...