./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0610fb40496b0ecade3a5ec9ba274ec558241ab5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:31:51,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:51,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:51,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:51,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:51,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:51,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:51,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:51,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:51,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:51,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:51,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:51,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:51,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:51,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:51,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:51,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:51,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:51,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:51,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:51,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:51,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:51,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:51,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:51,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:51,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:51,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:51,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:51,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:51,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:51,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:51,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:51,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:51,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:51,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:51,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:51,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:51,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:51,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:51,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:51,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:51,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:51,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:51,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:51,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:51,642 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:51,642 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:51,642 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:51,643 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:51,643 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:51,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:51,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:51,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:51,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:51,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:51,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:51,652 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:51,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:51,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:51,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:51,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:51,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:51,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:51,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:51,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:51,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:51,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:51,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:51,656 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:51,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:51,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:51,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:51,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:51,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:51,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:51,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:51,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:51,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:51,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:51,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:51,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:51,662 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0610fb40496b0ecade3a5ec9ba274ec558241ab5 [2021-10-11 02:31:52,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:52,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:52,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:52,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:52,058 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:52,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2021-10-11 02:31:52,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/data/147432e3b/2df517b6b7d94767915cdb7993bbc3ff/FLAG399e55f83 [2021-10-11 02:31:52,716 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:52,717 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2021-10-11 02:31:52,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/data/147432e3b/2df517b6b7d94767915cdb7993bbc3ff/FLAG399e55f83 [2021-10-11 02:31:52,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/data/147432e3b/2df517b6b7d94767915cdb7993bbc3ff [2021-10-11 02:31:52,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:52,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:52,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:52,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:52,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:52,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:52" (1/1) ... [2021-10-11 02:31:52,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d9bdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:52, skipping insertion in model container [2021-10-11 02:31:52,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:52" (1/1) ... [2021-10-11 02:31:52,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:53,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:53,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/sv-benchmarks/c/eca-rers2012/Problem01_label06.c[20964,20977] [2021-10-11 02:31:53,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:53,413 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:53,558 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/sv-benchmarks/c/eca-rers2012/Problem01_label06.c[20964,20977] [2021-10-11 02:31:53,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:53,584 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:53,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53 WrapperNode [2021-10-11 02:31:53,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:53,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:53,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:53,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:53,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:53,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:53,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:53,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:53,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... [2021-10-11 02:31:53,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:53,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:53,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:53,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:53,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:53,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:53,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:53,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:53,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:56,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:56,235 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:31:56,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:56 BoogieIcfgContainer [2021-10-11 02:31:56,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:56,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:56,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:56,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:56,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:52" (1/3) ... [2021-10-11 02:31:56,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7cdef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:56, skipping insertion in model container [2021-10-11 02:31:56,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:53" (2/3) ... [2021-10-11 02:31:56,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7cdef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:56, skipping insertion in model container [2021-10-11 02:31:56,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:56" (3/3) ... [2021-10-11 02:31:56,252 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2021-10-11 02:31:56,266 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:56,270 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:56,282 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:56,306 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:56,307 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:56,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:56,307 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:56,307 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:56,307 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:56,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:56,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:31:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:31:56,332 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:56,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:56,333 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1806905944, now seen corresponding path program 1 times [2021-10-11 02:31:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:56,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755819109] [2021-10-11 02:31:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:56,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755819109] [2021-10-11 02:31:56,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:56,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:56,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390709967] [2021-10-11 02:31:56,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:56,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:56,756 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:31:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:57,308 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:31:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:57,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:31:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:57,333 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:31:57,333 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:31:57,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:31:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:31:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:31:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2021-10-11 02:31:57,415 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2021-10-11 02:31:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:57,416 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2021-10-11 02:31:57,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2021-10-11 02:31:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-11 02:31:57,422 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:57,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:57,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:57,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:57,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1996671840, now seen corresponding path program 1 times [2021-10-11 02:31:57,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:57,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525435155] [2021-10-11 02:31:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:31:57,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525435155] [2021-10-11 02:31:57,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:57,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:57,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710513966] [2021-10-11 02:31:57,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:57,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:57,664 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand 3 states. [2021-10-11 02:31:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:58,114 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2021-10-11 02:31:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:58,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2021-10-11 02:31:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:58,118 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:31:58,118 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:31:58,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:31:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:31:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:31:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-11 02:31:58,137 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2021-10-11 02:31:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:58,138 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-11 02:31:58,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-11 02:31:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-11 02:31:58,142 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:58,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:58,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:58,143 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash 525301462, now seen corresponding path program 1 times [2021-10-11 02:31:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:58,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057214032] [2021-10-11 02:31:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:58,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057214032] [2021-10-11 02:31:58,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:58,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:58,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557942034] [2021-10-11 02:31:58,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:58,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:58,254 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand 4 states. [2021-10-11 02:31:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:58,978 INFO L93 Difference]: Finished difference Result 715 states and 1141 transitions. [2021-10-11 02:31:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:58,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2021-10-11 02:31:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:58,982 INFO L225 Difference]: With dead ends: 715 [2021-10-11 02:31:58,982 INFO L226 Difference]: Without dead ends: 429 [2021-10-11 02:31:58,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-11 02:31:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-10-11 02:31:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2021-10-11 02:31:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 639 transitions. [2021-10-11 02:31:59,016 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 639 transitions. Word has length 105 [2021-10-11 02:31:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:59,016 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 639 transitions. [2021-10-11 02:31:59,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 639 transitions. [2021-10-11 02:31:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-11 02:31:59,033 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:59,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:59,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:31:59,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash -863059680, now seen corresponding path program 1 times [2021-10-11 02:31:59,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:59,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645134214] [2021-10-11 02:31:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 02:31:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645134214] [2021-10-11 02:31:59,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:59,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:59,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633738666] [2021-10-11 02:31:59,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:59,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:59,151 INFO L87 Difference]: Start difference. First operand 429 states and 639 transitions. Second operand 3 states. [2021-10-11 02:31:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:59,565 INFO L93 Difference]: Finished difference Result 999 states and 1479 transitions. [2021-10-11 02:31:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:59,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2021-10-11 02:31:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:59,570 INFO L225 Difference]: With dead ends: 999 [2021-10-11 02:31:59,570 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:31:59,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:31:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 429. [2021-10-11 02:31:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2021-10-11 02:31:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 627 transitions. [2021-10-11 02:31:59,596 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 627 transitions. Word has length 109 [2021-10-11 02:31:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:59,598 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 627 transitions. [2021-10-11 02:31:59,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 627 transitions. [2021-10-11 02:31:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-11 02:31:59,602 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:59,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:59,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:31:59,603 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1821422808, now seen corresponding path program 1 times [2021-10-11 02:31:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125135158] [2021-10-11 02:31:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 02:31:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125135158] [2021-10-11 02:31:59,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:59,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862757319] [2021-10-11 02:31:59,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:59,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:59,735 INFO L87 Difference]: Start difference. First operand 429 states and 627 transitions. Second operand 4 states. [2021-10-11 02:32:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:00,341 INFO L93 Difference]: Finished difference Result 1354 states and 1955 transitions. [2021-10-11 02:32:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:00,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2021-10-11 02:32:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:00,345 INFO L225 Difference]: With dead ends: 1354 [2021-10-11 02:32:00,345 INFO L226 Difference]: Without dead ends: 784 [2021-10-11 02:32:00,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-11 02:32:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-10-11 02:32:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2021-10-11 02:32:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 998 transitions. [2021-10-11 02:32:00,399 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 998 transitions. Word has length 113 [2021-10-11 02:32:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:00,401 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 998 transitions. [2021-10-11 02:32:00,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 998 transitions. [2021-10-11 02:32:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-11 02:32:00,404 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:00,405 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:00,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:32:00,406 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:00,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1123295756, now seen corresponding path program 1 times [2021-10-11 02:32:00,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:00,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698414545] [2021-10-11 02:32:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-11 02:32:00,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698414545] [2021-10-11 02:32:00,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:00,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:00,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679466548] [2021-10-11 02:32:00,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:00,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:00,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:00,515 INFO L87 Difference]: Start difference. First operand 784 states and 998 transitions. Second operand 3 states. [2021-10-11 02:32:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:00,879 INFO L93 Difference]: Finished difference Result 1851 states and 2333 transitions. [2021-10-11 02:32:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:00,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2021-10-11 02:32:00,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:00,892 INFO L225 Difference]: With dead ends: 1851 [2021-10-11 02:32:00,892 INFO L226 Difference]: Without dead ends: 1068 [2021-10-11 02:32:00,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-11 02:32:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2021-10-11 02:32:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2021-10-11 02:32:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1175 transitions. [2021-10-11 02:32:00,927 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1175 transitions. Word has length 122 [2021-10-11 02:32:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:00,933 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1175 transitions. [2021-10-11 02:32:00,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1175 transitions. [2021-10-11 02:32:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-11 02:32:00,940 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:00,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:00,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:32:00,940 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1134312442, now seen corresponding path program 1 times [2021-10-11 02:32:00,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:00,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709909003] [2021-10-11 02:32:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-11 02:32:01,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709909003] [2021-10-11 02:32:01,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:01,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:01,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851214436] [2021-10-11 02:32:01,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:01,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:01,088 INFO L87 Difference]: Start difference. First operand 926 states and 1175 transitions. Second operand 3 states. [2021-10-11 02:32:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:01,425 INFO L93 Difference]: Finished difference Result 1851 states and 2349 transitions. [2021-10-11 02:32:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:01,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2021-10-11 02:32:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:01,431 INFO L225 Difference]: With dead ends: 1851 [2021-10-11 02:32:01,432 INFO L226 Difference]: Without dead ends: 926 [2021-10-11 02:32:01,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-10-11 02:32:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2021-10-11 02:32:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2021-10-11 02:32:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1161 transitions. [2021-10-11 02:32:01,458 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1161 transitions. Word has length 138 [2021-10-11 02:32:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:01,459 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1161 transitions. [2021-10-11 02:32:01,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1161 transitions. [2021-10-11 02:32:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-11 02:32:01,462 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:01,463 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:01,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:32:01,463 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:01,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2113824420, now seen corresponding path program 1 times [2021-10-11 02:32:01,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:01,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664096331] [2021-10-11 02:32:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-10-11 02:32:01,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664096331] [2021-10-11 02:32:01,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:01,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:01,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068235425] [2021-10-11 02:32:01,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:01,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:01,564 INFO L87 Difference]: Start difference. First operand 926 states and 1161 transitions. Second operand 4 states. [2021-10-11 02:32:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:02,092 INFO L93 Difference]: Finished difference Result 1922 states and 2403 transitions. [2021-10-11 02:32:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:02,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2021-10-11 02:32:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:02,099 INFO L225 Difference]: With dead ends: 1922 [2021-10-11 02:32:02,099 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:32:02,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:32:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-11 02:32:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2021-10-11 02:32:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1230 transitions. [2021-10-11 02:32:02,127 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1230 transitions. Word has length 154 [2021-10-11 02:32:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:02,127 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1230 transitions. [2021-10-11 02:32:02,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1230 transitions. [2021-10-11 02:32:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-11 02:32:02,131 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:02,131 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:02,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:32:02,132 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1461364887, now seen corresponding path program 1 times [2021-10-11 02:32:02,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:02,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598701130] [2021-10-11 02:32:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 02:32:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598701130] [2021-10-11 02:32:02,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:02,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943842396] [2021-10-11 02:32:02,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:02,318 INFO L87 Difference]: Start difference. First operand 997 states and 1230 transitions. Second operand 3 states. [2021-10-11 02:32:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:02,689 INFO L93 Difference]: Finished difference Result 2277 states and 2824 transitions. [2021-10-11 02:32:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:02,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2021-10-11 02:32:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:02,698 INFO L225 Difference]: With dead ends: 2277 [2021-10-11 02:32:02,698 INFO L226 Difference]: Without dead ends: 1281 [2021-10-11 02:32:02,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-10-11 02:32:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1068. [2021-10-11 02:32:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2021-10-11 02:32:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1322 transitions. [2021-10-11 02:32:02,736 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1322 transitions. Word has length 171 [2021-10-11 02:32:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:02,736 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1322 transitions. [2021-10-11 02:32:02,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1322 transitions. [2021-10-11 02:32:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-11 02:32:02,742 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:02,742 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:02,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:32:02,743 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1682001672, now seen corresponding path program 1 times [2021-10-11 02:32:02,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:02,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94837911] [2021-10-11 02:32:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-11 02:32:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94837911] [2021-10-11 02:32:02,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:02,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:32:02,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962935015] [2021-10-11 02:32:02,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:02,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:02,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:02,930 INFO L87 Difference]: Start difference. First operand 1068 states and 1322 transitions. Second operand 5 states. [2021-10-11 02:32:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:03,391 INFO L93 Difference]: Finished difference Result 2309 states and 2828 transitions. [2021-10-11 02:32:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:03,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2021-10-11 02:32:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:03,399 INFO L225 Difference]: With dead ends: 2309 [2021-10-11 02:32:03,399 INFO L226 Difference]: Without dead ends: 1242 [2021-10-11 02:32:03,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-10-11 02:32:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1139. [2021-10-11 02:32:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:32:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1375 transitions. [2021-10-11 02:32:03,434 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1375 transitions. Word has length 220 [2021-10-11 02:32:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:03,435 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1375 transitions. [2021-10-11 02:32:03,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1375 transitions. [2021-10-11 02:32:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-11 02:32:03,440 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:03,440 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-10-11 02:32:03,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:32:03,441 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1742521433, now seen corresponding path program 1 times [2021-10-11 02:32:03,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:03,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088360966] [2021-10-11 02:32:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-10-11 02:32:03,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088360966] [2021-10-11 02:32:03,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:03,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:03,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565807456] [2021-10-11 02:32:03,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:03,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:03,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:03,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:03,569 INFO L87 Difference]: Start difference. First operand 1139 states and 1375 transitions. Second operand 3 states. [2021-10-11 02:32:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:03,908 INFO L93 Difference]: Finished difference Result 2277 states and 2749 transitions. [2021-10-11 02:32:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:03,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2021-10-11 02:32:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:03,915 INFO L225 Difference]: With dead ends: 2277 [2021-10-11 02:32:03,916 INFO L226 Difference]: Without dead ends: 1139 [2021-10-11 02:32:03,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-11 02:32:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-10-11 02:32:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:32:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1326 transitions. [2021-10-11 02:32:03,950 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1326 transitions. Word has length 233 [2021-10-11 02:32:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:03,951 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1326 transitions. [2021-10-11 02:32:03,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1326 transitions. [2021-10-11 02:32:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-11 02:32:03,955 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:03,956 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:03,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:32:03,956 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1337016639, now seen corresponding path program 1 times [2021-10-11 02:32:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:03,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165708961] [2021-10-11 02:32:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 82 proven. 261 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-11 02:32:04,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165708961] [2021-10-11 02:32:04,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393681470] [2021-10-11 02:32:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:04,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:32:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-11 02:32:04,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-11 02:32:05,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:32:05,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2021-10-11 02:32:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044735727] [2021-10-11 02:32:05,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:05,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:32:05,362 INFO L87 Difference]: Start difference. First operand 1139 states and 1326 transitions. Second operand 3 states. [2021-10-11 02:32:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:05,690 INFO L93 Difference]: Finished difference Result 2490 states and 2917 transitions. [2021-10-11 02:32:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:05,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2021-10-11 02:32:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:05,698 INFO L225 Difference]: With dead ends: 2490 [2021-10-11 02:32:05,698 INFO L226 Difference]: Without dead ends: 1352 [2021-10-11 02:32:05,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:32:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-11 02:32:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2021-10-11 02:32:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:32:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1410 transitions. [2021-10-11 02:32:05,734 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1410 transitions. Word has length 242 [2021-10-11 02:32:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:05,735 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1410 transitions. [2021-10-11 02:32:05,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1410 transitions. [2021-10-11 02:32:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-11 02:32:05,740 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:05,741 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:05,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:32:05,961 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1841236912, now seen corresponding path program 1 times [2021-10-11 02:32:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:05,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360349891] [2021-10-11 02:32:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:32:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360349891] [2021-10-11 02:32:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673680283] [2021-10-11 02:32:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:32:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-11 02:32:06,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-11 02:32:07,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:32:07,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:32:07,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727982098] [2021-10-11 02:32:07,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:07,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:32:07,190 INFO L87 Difference]: Start difference. First operand 1210 states and 1410 transitions. Second operand 3 states. [2021-10-11 02:32:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:07,517 INFO L93 Difference]: Finished difference Result 2488 states and 2867 transitions. [2021-10-11 02:32:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:07,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2021-10-11 02:32:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:07,518 INFO L225 Difference]: With dead ends: 2488 [2021-10-11 02:32:07,518 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:32:07,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:32:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:32:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:32:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:32:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:32:07,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 255 [2021-10-11 02:32:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:07,524 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:32:07,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:32:07,524 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:32:07,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 02:32:07,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:32:08,202 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-10-11 02:32:08,482 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-10-11 02:32:08,485 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:32:08,485 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:32:08,485 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:32:08,485 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:32:08,485 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:32:08,485 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:32:08,486 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:32:08,487 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:32:08,488 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:32:08,489 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:32:08,490 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:32:08,490 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:32:08,490 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:32:08,490 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse3 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse8 (<= ~a16~0 4)) (.cse1 (<= ~a21~0 0)) (.cse7 (= ~a16~0 6)) (.cse5 (= ~a21~0 1)) (.cse9 (<= 14 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse4 (not .cse6))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse5 .cse6 .cse3 .cse2) (and .cse7 .cse1 .cse6) (and .cse5 .cse8 .cse3) (and .cse8 .cse6 .cse2) (and .cse8 .cse1 .cse6) (and .cse7 .cse4 (<= 15 ~a8~0)) (and .cse9 .cse5 .cse6) (and .cse9 .cse0 .cse4)))) [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:32:08,491 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:32:08,492 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:32:08,492 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:32:08,492 INFO L262 CegarLoopResult]: For program point L554-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:32:08,492 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:32:08,492 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:32:08,492 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:32:08,492 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L557-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L558(line 558) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:32:08,493 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:32:08,494 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:32:08,494 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:32:08,494 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:32:08,494 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse3 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse8 (<= ~a16~0 4)) (.cse1 (<= ~a21~0 0)) (.cse7 (= ~a16~0 6)) (.cse5 (= ~a21~0 1)) (.cse9 (<= 14 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse4 (not .cse6))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse5 .cse6 .cse3 .cse2) (and .cse7 .cse1 .cse6) (and .cse5 .cse8 .cse3) (and .cse8 .cse6 .cse2) (and .cse8 .cse1 .cse6) (and .cse7 .cse4 (<= 15 ~a8~0)) (and .cse9 .cse5 .cse6) (and .cse9 .cse0 .cse4)))) [2021-10-11 02:32:08,494 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:32:08,494 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 558) no Hoare annotation was computed. [2021-10-11 02:32:08,495 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:32:08,495 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:32:08,495 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:32:08,495 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:32:08,495 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:32:08,495 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:32:08,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:08 BoogieIcfgContainer [2021-10-11 02:32:08,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:08,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:08,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:08,541 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:08,541 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:56" (3/4) ... [2021-10-11 02:32:08,545 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:32:08,573 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2021-10-11 02:32:08,583 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:32:08,585 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 02:32:08,587 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:32:08,751 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51eb67e1-effa-4b74-8688-a901cd471aa3/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:08,752 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:08,753 INFO L168 Benchmark]: Toolchain (without parser) took 15797.86 ms. Allocated memory was 98.6 MB in the beginning and 499.1 MB in the end (delta: 400.6 MB). Free memory was 62.6 MB in the beginning and 458.4 MB in the end (delta: -395.7 MB). Peak memory consumption was 226.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,754 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory was 70.7 MB in the beginning and 70.7 MB in the end (delta: 30.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:08,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 628.10 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 58.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.31 ms. Allocated memory is still 98.6 MB. Free memory was 58.6 MB in the beginning and 53.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,755 INFO L168 Benchmark]: Boogie Preprocessor took 68.22 ms. Allocated memory is still 98.6 MB. Free memory was 53.1 MB in the beginning and 48.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,756 INFO L168 Benchmark]: RCFGBuilder took 2476.76 ms. Allocated memory was 98.6 MB in the beginning and 178.3 MB in the end (delta: 79.7 MB). Free memory was 48.5 MB in the beginning and 145.9 MB in the end (delta: -97.4 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,756 INFO L168 Benchmark]: TraceAbstraction took 12296.38 ms. Allocated memory was 178.3 MB in the beginning and 385.9 MB in the end (delta: 207.6 MB). Free memory was 144.8 MB in the beginning and 132.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 219.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,757 INFO L168 Benchmark]: Witness Printer took 211.18 ms. Allocated memory was 385.9 MB in the beginning and 499.1 MB in the end (delta: 113.2 MB). Free memory was 132.7 MB in the beginning and 458.4 MB in the end (delta: -325.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:08,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory was 70.7 MB in the beginning and 70.7 MB in the end (delta: 30.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 628.10 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 58.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.31 ms. Allocated memory is still 98.6 MB. Free memory was 58.6 MB in the beginning and 53.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.22 ms. Allocated memory is still 98.6 MB. Free memory was 53.1 MB in the beginning and 48.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2476.76 ms. Allocated memory was 98.6 MB in the beginning and 178.3 MB in the end (delta: 79.7 MB). Free memory was 48.5 MB in the beginning and 145.9 MB in the end (delta: -97.4 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12296.38 ms. Allocated memory was 178.3 MB in the beginning and 385.9 MB in the end (delta: 207.6 MB). Free memory was 144.8 MB in the beginning and 132.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 219.8 MB. Max. memory is 16.1 GB. * Witness Printer took 211.18 ms. Allocated memory was 385.9 MB in the beginning and 499.1 MB in the end (delta: 113.2 MB). Free memory was 132.7 MB in the beginning and 458.4 MB in the end (delta: -325.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 558]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && !(a7 == 1)) && !(a20 == 1))) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 == 6 && a21 <= 0) && a20 == 1)) || ((a21 == 1 && a16 <= 4) && !(a7 == 1))) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a20 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((14 <= a8 && a21 == 1) && a20 == 1)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && !(a7 == 1)) && !(a20 == 1))) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 == 6 && a21 <= 0) && a20 == 1)) || ((a21 == 1 && a16 <= 4) && !(a7 == 1))) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a20 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((14 <= a8 && a21 == 1) && a20 == 1)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 614 SDtfs, 1026 SDslu, 59 SDs, 0 SdLazy, 2999 SolverSat, 762 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1032 GetRequests, 1005 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1210occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 742 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 221 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3006 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 660 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 2505 NumberOfCodeBlocks, 2505 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2985 ConstructedInterpolants, 0 QuantifiedInterpolants, 1963070 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1039 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 17 InterpolantComputations, 15 PerfectInterpolantSequences, 3204/3568 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...