./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/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_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/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_8fdaab53-3738-417f-baff-f40a942dc1f5/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 b35ebac14d675485534a7c769439016d2f7efb28 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:21:44,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:44,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:44,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:44,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:44,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:44,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:44,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:44,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:44,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:44,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:44,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:44,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:44,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:44,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:44,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:44,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:44,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:44,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:44,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:44,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:44,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:44,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:44,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:44,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:44,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:44,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:44,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:44,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:44,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:44,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:44,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:44,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:44,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:44,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:44,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:44,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:44,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:44,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:44,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:44,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:44,500 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:21:44,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:44,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:44,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:44,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:44,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:44,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:44,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:21:44,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:44,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:44,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:21:44,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:21:44,550 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:44,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:21:44,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:21:44,551 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:21:44,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:44,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:44,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:21:44,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:44,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:44,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:44,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:44,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:44,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:44,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:44,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:44,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:44,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:44,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:44,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:44,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:44,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:44,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:44,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:44,558 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:21:44,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:21:44,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:44,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:44,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:44,559 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_8fdaab53-3738-417f-baff-f40a942dc1f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b35ebac14d675485534a7c769439016d2f7efb28 [2021-10-11 02:21:44,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:44,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:44,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:44,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:44,911 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:44,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label39.c [2021-10-11 02:21:44,988 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/data/87d619a55/0e373726d92c48a6a52ad42d5a9f1a68/FLAG9ea706e83 [2021-10-11 02:21:45,592 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:45,593 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/sv-benchmarks/c/eca-rers2012/Problem01_label39.c [2021-10-11 02:21:45,620 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/data/87d619a55/0e373726d92c48a6a52ad42d5a9f1a68/FLAG9ea706e83 [2021-10-11 02:21:45,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/data/87d619a55/0e373726d92c48a6a52ad42d5a9f1a68 [2021-10-11 02:21:45,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:45,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:45,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:45,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:45,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:45,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:45" (1/1) ... [2021-10-11 02:21:45,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b716840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:45, skipping insertion in model container [2021-10-11 02:21:45,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:45" (1/1) ... [2021-10-11 02:21:45,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:45,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:46,308 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_8fdaab53-3738-417f-baff-f40a942dc1f5/sv-benchmarks/c/eca-rers2012/Problem01_label39.c[21959,21972] [2021-10-11 02:21:46,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:46,335 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:46,428 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_8fdaab53-3738-417f-baff-f40a942dc1f5/sv-benchmarks/c/eca-rers2012/Problem01_label39.c[21959,21972] [2021-10-11 02:21:46,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:46,462 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:46,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46 WrapperNode [2021-10-11 02:21:46,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:46,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:46,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:46,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:46,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:46,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:46,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:46,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:46,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... [2021-10-11 02:21:46,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:46,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:46,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:46,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:46,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/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 02:21:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:21:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:46,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:46,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:48,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:48,918 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:21:48,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:48 BoogieIcfgContainer [2021-10-11 02:21:48,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:48,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:48,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:48,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:48,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:45" (1/3) ... [2021-10-11 02:21:48,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597f9cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:48, skipping insertion in model container [2021-10-11 02:21:48,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:46" (2/3) ... [2021-10-11 02:21:48,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597f9cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:48, skipping insertion in model container [2021-10-11 02:21:48,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:48" (3/3) ... [2021-10-11 02:21:48,932 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label39.c [2021-10-11 02:21:48,945 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:48,948 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:21:48,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:21:49,008 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:49,008 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:49,008 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:49,008 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:49,008 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:49,008 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:49,009 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:49,009 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:21:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:21:49,034 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:49,035 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 02:21:49,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1806903896, now seen corresponding path program 1 times [2021-10-11 02:21:49,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:49,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307611551] [2021-10-11 02:21:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:49,508 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 02:21:49,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307611551] [2021-10-11 02:21:49,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:49,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:49,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643589466] [2021-10-11 02:21:49,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:49,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:49,531 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:21:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:50,000 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:21:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:50,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:21:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:50,031 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:21:50,031 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:21:50,034 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 02:21:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:21:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:21:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:21:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-11 02:21:50,099 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-11 02:21:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:50,100 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-11 02:21:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-11 02:21:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-11 02:21:50,105 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:50,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:50,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:21:50,106 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1694604350, now seen corresponding path program 1 times [2021-10-11 02:21:50,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:50,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242421169] [2021-10-11 02:21:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:50,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242421169] [2021-10-11 02:21:50,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:50,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:50,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276315560] [2021-10-11 02:21:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:50,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:50,203 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2021-10-11 02:21:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:50,607 INFO L93 Difference]: Finished difference Result 433 states and 775 transitions. [2021-10-11 02:21:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:50,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2021-10-11 02:21:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:50,615 INFO L225 Difference]: With dead ends: 433 [2021-10-11 02:21:50,615 INFO L226 Difference]: Without dead ends: 289 [2021-10-11 02:21:50,618 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 02:21:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-11 02:21:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2021-10-11 02:21:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:21:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 480 transitions. [2021-10-11 02:21:50,661 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 480 transitions. Word has length 76 [2021-10-11 02:21:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:50,662 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 480 transitions. [2021-10-11 02:21:50,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 480 transitions. [2021-10-11 02:21:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-11 02:21:50,671 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:50,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:50,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:21:50,672 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 348749876, now seen corresponding path program 1 times [2021-10-11 02:21:50,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:50,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800542412] [2021-10-11 02:21:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:50,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800542412] [2021-10-11 02:21:50,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:50,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:50,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143987986] [2021-10-11 02:21:50,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:50,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:50,770 INFO L87 Difference]: Start difference. First operand 287 states and 480 transitions. Second operand 3 states. [2021-10-11 02:21:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:51,238 INFO L93 Difference]: Finished difference Result 857 states and 1437 transitions. [2021-10-11 02:21:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:51,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2021-10-11 02:21:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:51,242 INFO L225 Difference]: With dead ends: 857 [2021-10-11 02:21:51,243 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:21:51,245 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 02:21:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:21:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:21:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:21:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 886 transitions. [2021-10-11 02:21:51,290 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 886 transitions. Word has length 80 [2021-10-11 02:21:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:51,291 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 886 transitions. [2021-10-11 02:21:51,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 886 transitions. [2021-10-11 02:21:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-11 02:21:51,293 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:51,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:51,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:21:51,294 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash -143894451, now seen corresponding path program 1 times [2021-10-11 02:21:51,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:51,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937634062] [2021-10-11 02:21:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:51,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937634062] [2021-10-11 02:21:51,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:51,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021852843] [2021-10-11 02:21:51,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:51,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:51,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:51,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:51,425 INFO L87 Difference]: Start difference. First operand 571 states and 886 transitions. Second operand 4 states. [2021-10-11 02:21:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:52,075 INFO L93 Difference]: Finished difference Result 1425 states and 2187 transitions. [2021-10-11 02:21:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:21:52,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2021-10-11 02:21:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:52,081 INFO L225 Difference]: With dead ends: 1425 [2021-10-11 02:21:52,082 INFO L226 Difference]: Without dead ends: 855 [2021-10-11 02:21:52,084 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 02:21:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-11 02:21:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2021-10-11 02:21:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-10-11 02:21:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1058 transitions. [2021-10-11 02:21:52,108 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1058 transitions. Word has length 83 [2021-10-11 02:21:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:52,109 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1058 transitions. [2021-10-11 02:21:52,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1058 transitions. [2021-10-11 02:21:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-11 02:21:52,111 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:52,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:52,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:21:52,112 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1756794500, now seen corresponding path program 1 times [2021-10-11 02:21:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:52,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677461789] [2021-10-11 02:21:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:52,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677461789] [2021-10-11 02:21:52,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:52,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:52,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552030953] [2021-10-11 02:21:52,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:52,169 INFO L87 Difference]: Start difference. First operand 713 states and 1058 transitions. Second operand 3 states. [2021-10-11 02:21:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:52,619 INFO L93 Difference]: Finished difference Result 1922 states and 2892 transitions. [2021-10-11 02:21:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:52,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2021-10-11 02:21:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:52,627 INFO L225 Difference]: With dead ends: 1922 [2021-10-11 02:21:52,627 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:21:52,629 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 02:21:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:21:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-11 02:21:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2021-10-11 02:21:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1512 transitions. [2021-10-11 02:21:52,660 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1512 transitions. Word has length 84 [2021-10-11 02:21:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:52,661 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1512 transitions. [2021-10-11 02:21:52,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1512 transitions. [2021-10-11 02:21:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-11 02:21:52,663 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:52,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:52,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:21:52,664 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -358255574, now seen corresponding path program 1 times [2021-10-11 02:21:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:52,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423737854] [2021-10-11 02:21:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:52,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423737854] [2021-10-11 02:21:52,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:52,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:52,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381992923] [2021-10-11 02:21:52,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:52,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:52,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:52,718 INFO L87 Difference]: Start difference. First operand 997 states and 1512 transitions. Second operand 3 states. [2021-10-11 02:21:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:53,137 INFO L93 Difference]: Finished difference Result 2206 states and 3309 transitions. [2021-10-11 02:21:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:53,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2021-10-11 02:21:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:53,147 INFO L225 Difference]: With dead ends: 2206 [2021-10-11 02:21:53,148 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:21:53,149 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 02:21:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:21:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2021-10-11 02:21:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:21:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1744 transitions. [2021-10-11 02:21:53,212 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1744 transitions. Word has length 84 [2021-10-11 02:21:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:53,216 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1744 transitions. [2021-10-11 02:21:53,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1744 transitions. [2021-10-11 02:21:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-11 02:21:53,219 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:53,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:53,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:21:53,220 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1140296667, now seen corresponding path program 1 times [2021-10-11 02:21:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:53,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362073922] [2021-10-11 02:21:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:53,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362073922] [2021-10-11 02:21:53,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936192246] [2021-10-11 02:21:53,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:53,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:53,320 INFO L87 Difference]: Start difference. First operand 1210 states and 1744 transitions. Second operand 3 states. [2021-10-11 02:21:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:53,690 INFO L93 Difference]: Finished difference Result 2490 states and 3576 transitions. [2021-10-11 02:21:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:53,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2021-10-11 02:21:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:53,697 INFO L225 Difference]: With dead ends: 2490 [2021-10-11 02:21:53,697 INFO L226 Difference]: Without dead ends: 1139 [2021-10-11 02:21:53,699 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 02:21:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-11 02:21:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-10-11 02:21:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:21:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1482 transitions. [2021-10-11 02:21:53,729 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1482 transitions. Word has length 86 [2021-10-11 02:21:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:53,729 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1482 transitions. [2021-10-11 02:21:53,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1482 transitions. [2021-10-11 02:21:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-11 02:21:53,732 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:53,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:53,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:21:53,732 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1572569458, now seen corresponding path program 1 times [2021-10-11 02:21:53,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:53,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170653793] [2021-10-11 02:21:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:21:53,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170653793] [2021-10-11 02:21:53,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:53,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:53,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509214358] [2021-10-11 02:21:53,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:53,849 INFO L87 Difference]: Start difference. First operand 1139 states and 1482 transitions. Second operand 3 states. [2021-10-11 02:21:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:54,221 INFO L93 Difference]: Finished difference Result 2348 states and 3049 transitions. [2021-10-11 02:21:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:54,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2021-10-11 02:21:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:54,228 INFO L225 Difference]: With dead ends: 2348 [2021-10-11 02:21:54,229 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:21:54,230 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 02:21:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:21:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2021-10-11 02:21:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:21:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1498 transitions. [2021-10-11 02:21:54,262 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1498 transitions. Word has length 88 [2021-10-11 02:21:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:54,263 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1498 transitions. [2021-10-11 02:21:54,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1498 transitions. [2021-10-11 02:21:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-11 02:21:54,265 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:54,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:54,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:21:54,266 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1043312787, now seen corresponding path program 1 times [2021-10-11 02:21:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522471151] [2021-10-11 02:21:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:54,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522471151] [2021-10-11 02:21:54,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:54,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778306533] [2021-10-11 02:21:54,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:54,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:54,348 INFO L87 Difference]: Start difference. First operand 1210 states and 1498 transitions. Second operand 4 states. [2021-10-11 02:21:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:54,830 INFO L93 Difference]: Finished difference Result 2419 states and 2995 transitions. [2021-10-11 02:21:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:21:54,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-10-11 02:21:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:54,837 INFO L225 Difference]: With dead ends: 2419 [2021-10-11 02:21:54,838 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:21:54,839 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 02:21:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:21:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2021-10-11 02:21:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:21:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1477 transitions. [2021-10-11 02:21:54,868 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1477 transitions. Word has length 90 [2021-10-11 02:21:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:54,868 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1477 transitions. [2021-10-11 02:21:54,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1477 transitions. [2021-10-11 02:21:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-11 02:21:54,870 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:54,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:54,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:21:54,871 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1202879470, now seen corresponding path program 1 times [2021-10-11 02:21:54,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:54,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164299068] [2021-10-11 02:21:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:21:54,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164299068] [2021-10-11 02:21:54,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:54,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:54,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824539433] [2021-10-11 02:21:54,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:54,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:54,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:54,971 INFO L87 Difference]: Start difference. First operand 1210 states and 1477 transitions. Second operand 3 states. [2021-10-11 02:21:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:55,319 INFO L93 Difference]: Finished difference Result 2774 states and 3400 transitions. [2021-10-11 02:21:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:55,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2021-10-11 02:21:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:55,327 INFO L225 Difference]: With dead ends: 2774 [2021-10-11 02:21:55,328 INFO L226 Difference]: Without dead ends: 1565 [2021-10-11 02:21:55,330 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 02:21:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-10-11 02:21:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1494. [2021-10-11 02:21:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2021-10-11 02:21:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1810 transitions. [2021-10-11 02:21:55,367 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1810 transitions. Word has length 108 [2021-10-11 02:21:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:55,368 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1810 transitions. [2021-10-11 02:21:55,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1810 transitions. [2021-10-11 02:21:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-11 02:21:55,371 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:55,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:55,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:21:55,372 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1110346781, now seen corresponding path program 1 times [2021-10-11 02:21:55,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:55,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198316801] [2021-10-11 02:21:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:55,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198316801] [2021-10-11 02:21:55,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280481456] [2021-10-11 02:21:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/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 02:21:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:55,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:21:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-11 02:21:55,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-11 02:21:56,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:21:56,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:21:56,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680678261] [2021-10-11 02:21:56,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:56,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:56,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:56,019 INFO L87 Difference]: Start difference. First operand 1494 states and 1810 transitions. Second operand 3 states. [2021-10-11 02:21:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:56,380 INFO L93 Difference]: Finished difference Result 3484 states and 4286 transitions. [2021-10-11 02:21:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:56,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2021-10-11 02:21:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:56,391 INFO L225 Difference]: With dead ends: 3484 [2021-10-11 02:21:56,392 INFO L226 Difference]: Without dead ends: 1991 [2021-10-11 02:21:56,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-10-11 02:21:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1849. [2021-10-11 02:21:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1849 states. [2021-10-11 02:21:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2240 transitions. [2021-10-11 02:21:56,436 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2240 transitions. Word has length 134 [2021-10-11 02:21:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:56,437 INFO L481 AbstractCegarLoop]: Abstraction has 1849 states and 2240 transitions. [2021-10-11 02:21:56,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2240 transitions. [2021-10-11 02:21:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-11 02:21:56,441 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:56,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:56,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-11 02:21:56,669 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1216267738, now seen corresponding path program 1 times [2021-10-11 02:21:56,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:56,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687959309] [2021-10-11 02:21:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:21:56,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687959309] [2021-10-11 02:21:56,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:56,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:56,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918370288] [2021-10-11 02:21:56,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:56,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:56,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:56,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:56,831 INFO L87 Difference]: Start difference. First operand 1849 states and 2240 transitions. Second operand 4 states. [2021-10-11 02:21:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:57,391 INFO L93 Difference]: Finished difference Result 3910 states and 4711 transitions. [2021-10-11 02:21:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:21:57,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2021-10-11 02:21:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:57,402 INFO L225 Difference]: With dead ends: 3910 [2021-10-11 02:21:57,402 INFO L226 Difference]: Without dead ends: 2062 [2021-10-11 02:21:57,405 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 02:21:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-10-11 02:21:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1139. [2021-10-11 02:21:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:21:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1347 transitions. [2021-10-11 02:21:57,444 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1347 transitions. Word has length 151 [2021-10-11 02:21:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:57,444 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1347 transitions. [2021-10-11 02:21:57,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1347 transitions. [2021-10-11 02:21:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-10-11 02:21:57,448 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:57,448 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:57,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-11 02:21:57,449 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2109691204, now seen corresponding path program 1 times [2021-10-11 02:21:57,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:57,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603735641] [2021-10-11 02:21:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-11 02:21:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603735641] [2021-10-11 02:21:57,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:57,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:21:57,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595545851] [2021-10-11 02:21:57,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:21:57,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:21:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:57,693 INFO L87 Difference]: Start difference. First operand 1139 states and 1347 transitions. Second operand 5 states. [2021-10-11 02:21:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:58,209 INFO L93 Difference]: Finished difference Result 2454 states and 2881 transitions. [2021-10-11 02:21:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:21:58,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 194 [2021-10-11 02:21:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:58,217 INFO L225 Difference]: With dead ends: 2454 [2021-10-11 02:21:58,217 INFO L226 Difference]: Without dead ends: 1316 [2021-10-11 02:21:58,218 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 02:21:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-11 02:21:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1210. [2021-10-11 02:21:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:21:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1399 transitions. [2021-10-11 02:21:58,255 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1399 transitions. Word has length 194 [2021-10-11 02:21:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:58,255 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1399 transitions. [2021-10-11 02:21:58,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:21:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1399 transitions. [2021-10-11 02:21:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-10-11 02:21:58,260 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:58,260 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:58,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 02:21:58,260 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1996120037, now seen corresponding path program 1 times [2021-10-11 02:21:58,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:58,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255343861] [2021-10-11 02:21:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-11 02:21:58,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255343861] [2021-10-11 02:21:58,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:58,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:58,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250374945] [2021-10-11 02:21:58,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:58,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:58,400 INFO L87 Difference]: Start difference. First operand 1210 states and 1399 transitions. Second operand 3 states. [2021-10-11 02:21:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:58,813 INFO L93 Difference]: Finished difference Result 2419 states and 2797 transitions. [2021-10-11 02:21:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:58,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2021-10-11 02:21:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:58,820 INFO L225 Difference]: With dead ends: 2419 [2021-10-11 02:21:58,820 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:21:58,822 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 02:21:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:21:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2021-10-11 02:21:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:21:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1292 transitions. [2021-10-11 02:21:58,850 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1292 transitions. Word has length 207 [2021-10-11 02:21:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:58,851 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1292 transitions. [2021-10-11 02:21:58,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1292 transitions. [2021-10-11 02:21:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-10-11 02:21:58,855 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:58,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:58,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-11 02:21:58,856 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 236751949, now seen corresponding path program 1 times [2021-10-11 02:21:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:58,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656421406] [2021-10-11 02:21:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-11 02:21:59,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656421406] [2021-10-11 02:21:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947002973] [2021-10-11 02:21:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/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 02:21:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:21:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:21:59,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:21:59,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:21:59,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:21:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432652879] [2021-10-11 02:21:59,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:59,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:59,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:21:59,790 INFO L87 Difference]: Start difference. First operand 1139 states and 1292 transitions. Second operand 3 states. [2021-10-11 02:22:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:00,129 INFO L93 Difference]: Finished difference Result 1352 states and 1521 transitions. [2021-10-11 02:22:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:00,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2021-10-11 02:22:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:00,131 INFO L225 Difference]: With dead ends: 1352 [2021-10-11 02:22:00,131 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:22:00,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:22:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:22:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:22:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:22:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:22:00,134 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2021-10-11 02:22:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:00,134 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:22:00,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:22:00,135 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:22:00,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-11 02:22:00,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:22:00,499 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 61 [2021-10-11 02:22:00,778 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-10-11 02:22:01,011 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-10-11 02:22:01,014 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:22:01,015 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:22:01,016 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:22:01,017 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L578-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:22:01,018 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point L581-1(lines 581 583) no Hoare annotation was computed. [2021-10-11 02:22:01,019 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:22:01,020 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:22:01,020 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:22:01,020 INFO L262 CegarLoopResult]: For program point L582(line 582) no Hoare annotation was computed. [2021-10-11 02:22:01,025 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:22:01,025 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse2 (= ~a16~0 6)) (.cse0 (<= ~a16~0 4)) (.cse5 (= ~a21~0 1)) (.cse3 (= ~a20~0 1)) (.cse6 (<= 15 ~a8~0))) (or (and .cse0 .cse1) (and .cse2 .cse3) (and .cse4 .cse3 .cse1) (and .cse5 (<= ~a7~0 0) .cse3 .cse1) (and (<= 14 ~a8~0) .cse5 .cse4) (and .cse5 .cse2 .cse6) (and .cse5 .cse0) (and .cse0 .cse3) (and .cse5 .cse3 .cse6))) [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:22:01,026 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:22:01,027 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:22:01,028 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:22:01,029 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse2 (= ~a16~0 6)) (.cse0 (<= ~a16~0 4)) (.cse5 (= ~a21~0 1)) (.cse3 (= ~a20~0 1)) (.cse6 (<= 15 ~a8~0))) (or (and .cse0 .cse1) (and .cse2 .cse3) (and .cse4 .cse3 .cse1) (and .cse5 (<= ~a7~0 0) .cse3 .cse1) (and (<= 14 ~a8~0) .cse5 .cse4) (and .cse5 .cse2 .cse6) (and .cse5 .cse0) (and .cse0 .cse3) (and .cse5 .cse3 .cse6))) [2021-10-11 02:22:01,029 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:22:01,029 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 582) no Hoare annotation was computed. [2021-10-11 02:22:01,029 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:22:01,029 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:22:01,029 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:22:01,030 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:22:01,030 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:22:01,030 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:22:01,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:01 BoogieIcfgContainer [2021-10-11 02:22:01,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:01,076 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:01,076 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:01,076 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:01,077 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:48" (3/4) ... [2021-10-11 02:22:01,080 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:22:01,115 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2021-10-11 02:22:01,116 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:22:01,118 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 02:22:01,119 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:22:01,261 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdaab53-3738-417f-baff-f40a942dc1f5/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:01,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:01,263 INFO L168 Benchmark]: Toolchain (without parser) took 15413.70 ms. Allocated memory was 94.4 MB in the beginning and 415.2 MB in the end (delta: 320.9 MB). Free memory was 55.1 MB in the beginning and 184.1 MB in the end (delta: -129.0 MB). Peak memory consumption was 191.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,264 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 74.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:01,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 610.78 ms. Allocated memory is still 94.4 MB. Free memory was 54.9 MB in the beginning and 53.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,265 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.10 ms. Allocated memory is still 94.4 MB. Free memory was 53.1 MB in the beginning and 47.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,265 INFO L168 Benchmark]: Boogie Preprocessor took 83.45 ms. Allocated memory is still 94.4 MB. Free memory was 47.5 MB in the beginning and 43.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,266 INFO L168 Benchmark]: RCFGBuilder took 2272.82 ms. Allocated memory was 94.4 MB in the beginning and 148.9 MB in the end (delta: 54.5 MB). Free memory was 42.7 MB in the beginning and 59.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,266 INFO L168 Benchmark]: TraceAbstraction took 12151.04 ms. Allocated memory was 148.9 MB in the beginning and 415.2 MB in the end (delta: 266.3 MB). Free memory was 58.1 MB in the beginning and 198.8 MB in the end (delta: -140.7 MB). Peak memory consumption was 127.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,267 INFO L168 Benchmark]: Witness Printer took 186.05 ms. Allocated memory is still 415.2 MB. Free memory was 198.8 MB in the beginning and 184.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:01,269 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 94.4 MB. Free memory is still 74.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 610.78 ms. Allocated memory is still 94.4 MB. Free memory was 54.9 MB in the beginning and 53.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.10 ms. Allocated memory is still 94.4 MB. Free memory was 53.1 MB in the beginning and 47.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.45 ms. Allocated memory is still 94.4 MB. Free memory was 47.5 MB in the beginning and 43.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2272.82 ms. Allocated memory was 94.4 MB in the beginning and 148.9 MB in the end (delta: 54.5 MB). Free memory was 42.7 MB in the beginning and 59.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12151.04 ms. Allocated memory was 148.9 MB in the beginning and 415.2 MB in the end (delta: 266.3 MB). Free memory was 58.1 MB in the beginning and 198.8 MB in the end (delta: -140.7 MB). Peak memory consumption was 127.8 MB. Max. memory is 16.1 GB. * Witness Printer took 186.05 ms. Allocated memory is still 415.2 MB. Free memory was 198.8 MB in the beginning and 184.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 582]: 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 <= 4 && a17 == 1) || (a16 == 6 && a20 == 1)) || ((a16 <= 5 && a20 == 1) && a17 == 1)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || ((14 <= a8 && a21 == 1) && a16 <= 5)) || ((a21 == 1 && a16 == 6) && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || (a16 <= 4 && a20 == 1)) || ((a21 == 1 && a20 == 1) && 15 <= a8) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((a16 <= 4 && a17 == 1) || (a16 == 6 && a20 == 1)) || ((a16 <= 5 && a20 == 1) && a17 == 1)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || ((14 <= a8 && a21 == 1) && a16 <= 5)) || ((a21 == 1 && a16 == 6) && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || (a16 <= 4 && a20 == 1)) || ((a21 == 1 && a20 == 1) && 15 <= a8) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 15, TraceHistogramMax: 6, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 725 SDtfs, 1169 SDslu, 90 SDs, 0 SdLazy, 3459 SolverSat, 873 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 739 GetRequests, 712 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 1670 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 165 HoareAnnotationTreeSize, 3 FomulaSimplifications, 4556 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 556 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 2102 NumberOfCodeBlocks, 2102 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2433 ConstructedInterpolants, 0 QuantifiedInterpolants, 1177690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 845 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 19 InterpolantComputations, 17 PerfectInterpolantSequences, 1751/1850 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...