./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH --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 561889d92df45f99e756a59f568aff549bcbf1af3442520c3f6faf4dbc996ed6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:14:57,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:14:57,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:14:57,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:14:57,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:14:57,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:14:57,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:14:57,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:14:57,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:14:57,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:14:57,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:14:57,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:14:57,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:14:57,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:14:57,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:14:57,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:14:57,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:14:57,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:14:57,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:14:57,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:14:57,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:14:57,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:14:57,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:14:57,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:14:57,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:14:57,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:14:57,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:14:57,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:14:57,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:14:57,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:14:57,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:14:57,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:14:57,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:14:57,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:14:57,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:14:57,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:14:57,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:14:57,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:14:57,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:14:57,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:14:57,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:14:57,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:14:57,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:14:57,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:14:57,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:14:57,687 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:14:57,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:14:57,687 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:14:57,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:14:57,688 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:14:57,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:14:57,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:14:57,688 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:14:57,689 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:14:57,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:14:57,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:14:57,689 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:14:57,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:14:57,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:14:57,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:14:57,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:14:57,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:14:57,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:14:57,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:14:57,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:14:57,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:14:57,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:14:57,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:14:57,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:14:57,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:14:57,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:14:57,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:14:57,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:14:57,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:14:57,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:14:57,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:14:57,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:14:57,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:14:57,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:14:57,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:14:57,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:14:57,695 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_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 561889d92df45f99e756a59f568aff549bcbf1af3442520c3f6faf4dbc996ed6 [2021-11-03 04:14:57,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:14:57,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:14:57,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:14:57,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:14:57,974 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:14:57,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-03 04:14:58,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/data/c586bfa75/434ef9a7e90a4faa91ea89a219a7932e/FLAG33bfb723f [2021-11-03 04:14:58,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:14:58,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-03 04:14:58,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/data/c586bfa75/434ef9a7e90a4faa91ea89a219a7932e/FLAG33bfb723f [2021-11-03 04:14:58,929 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/data/c586bfa75/434ef9a7e90a4faa91ea89a219a7932e [2021-11-03 04:14:58,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:14:58,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:14:58,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:14:58,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:14:58,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:14:58,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:14:58" (1/1) ... [2021-11-03 04:14:58,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a907b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:58, skipping insertion in model container [2021-11-03 04:14:58,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:14:58" (1/1) ... [2021-11-03 04:14:58,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:14:59,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:14:59,264 WARN L228 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_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7180,7193] [2021-11-03 04:14:59,296 WARN L228 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_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9491,9504] [2021-11-03 04:14:59,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:14:59,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:14:59,377 WARN L228 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_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7180,7193] [2021-11-03 04:14:59,388 WARN L228 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_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9491,9504] [2021-11-03 04:14:59,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:14:59,412 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:14:59,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59 WrapperNode [2021-11-03 04:14:59,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:14:59,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:14:59,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:14:59,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:14:59,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:14:59,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:14:59,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:14:59,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:14:59,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:14:59,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:14:59,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:14:59,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:14:59,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (1/1) ... [2021-11-03 04:14:59,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:14:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:59,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:14:59,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:14:59,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:14:59,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:14:59,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:14:59,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:15:00,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:15:00,631 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 04:15:00,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:15:00 BoogieIcfgContainer [2021-11-03 04:15:00,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:15:00,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:15:00,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:15:00,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:15:00,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:14:58" (1/3) ... [2021-11-03 04:15:00,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c55c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:15:00, skipping insertion in model container [2021-11-03 04:15:00,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:59" (2/3) ... [2021-11-03 04:15:00,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c55c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:15:00, skipping insertion in model container [2021-11-03 04:15:00,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:15:00" (3/3) ... [2021-11-03 04:15:00,643 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-03 04:15:00,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:15:00,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:15:00,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:15:00,702 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:15:00,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:15:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 76 states have (on average 1.763157894736842) internal successors, (134), 78 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 04:15:00,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:00,725 INFO L513 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] [2021-11-03 04:15:00,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1680243257, now seen corresponding path program 1 times [2021-11-03 04:15:00,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:00,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119740936] [2021-11-03 04:15:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:00,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:01,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:01,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119740936] [2021-11-03 04:15:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119740936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:01,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:01,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:15:01,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335770938] [2021-11-03 04:15:01,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:15:01,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:15:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:15:01,072 INFO L87 Difference]: Start difference. First operand has 79 states, 76 states have (on average 1.763157894736842) internal successors, (134), 78 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:01,232 INFO L93 Difference]: Finished difference Result 140 states and 227 transitions. [2021-11-03 04:15:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:15:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 04:15:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:01,244 INFO L225 Difference]: With dead ends: 140 [2021-11-03 04:15:01,245 INFO L226 Difference]: Without dead ends: 77 [2021-11-03 04:15:01,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:15:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-03 04:15:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-03 04:15:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2021-11-03 04:15:01,339 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 41 [2021-11-03 04:15:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:01,340 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2021-11-03 04:15:01,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2021-11-03 04:15:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 04:15:01,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:01,342 INFO L513 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] [2021-11-03 04:15:01,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:15:01,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1222619483, now seen corresponding path program 1 times [2021-11-03 04:15:01,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:01,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573864397] [2021-11-03 04:15:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:01,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:01,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:01,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573864397] [2021-11-03 04:15:01,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573864397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:01,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:01,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:15:01,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348910377] [2021-11-03 04:15:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:15:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:15:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:15:01,508 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:01,631 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2021-11-03 04:15:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:15:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 04:15:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:01,635 INFO L225 Difference]: With dead ends: 124 [2021-11-03 04:15:01,635 INFO L226 Difference]: Without dead ends: 77 [2021-11-03 04:15:01,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:15:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-03 04:15:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-03 04:15:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-11-03 04:15:01,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 42 [2021-11-03 04:15:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:01,662 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-11-03 04:15:01,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-11-03 04:15:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 04:15:01,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:01,664 INFO L513 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] [2021-11-03 04:15:01,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:15:01,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1788842617, now seen corresponding path program 1 times [2021-11-03 04:15:01,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:01,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47663389] [2021-11-03 04:15:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:01,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:01,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:01,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47663389] [2021-11-03 04:15:01,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47663389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:01,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:01,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:15:01,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420502086] [2021-11-03 04:15:01,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:15:01,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:15:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:15:01,835 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:01,925 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2021-11-03 04:15:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:15:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-03 04:15:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:01,929 INFO L225 Difference]: With dead ends: 128 [2021-11-03 04:15:01,930 INFO L226 Difference]: Without dead ends: 77 [2021-11-03 04:15:01,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:15:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-03 04:15:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-03 04:15:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-11-03 04:15:01,945 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 43 [2021-11-03 04:15:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:01,945 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-11-03 04:15:01,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-11-03 04:15:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 04:15:01,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:01,950 INFO L513 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] [2021-11-03 04:15:01,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:15:01,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash 404500825, now seen corresponding path program 1 times [2021-11-03 04:15:01,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:01,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588663090] [2021-11-03 04:15:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:01,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:04,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:04,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588663090] [2021-11-03 04:15:04,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588663090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:04,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:04,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 04:15:04,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928632586] [2021-11-03 04:15:04,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:15:04,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:15:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:15:04,444 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:07,782 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-11-03 04:15:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:15:07,783 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-03 04:15:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:07,785 INFO L225 Difference]: With dead ends: 132 [2021-11-03 04:15:07,785 INFO L226 Difference]: Without dead ends: 103 [2021-11-03 04:15:07,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:15:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-03 04:15:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-11-03 04:15:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1818181818181819) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2021-11-03 04:15:07,798 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 44 [2021-11-03 04:15:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:07,799 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2021-11-03 04:15:07,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2021-11-03 04:15:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:15:07,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:07,801 INFO L513 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] [2021-11-03 04:15:07,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:15:07,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:07,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:07,802 INFO L85 PathProgramCache]: Analyzing trace with hash -520029730, now seen corresponding path program 1 times [2021-11-03 04:15:07,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:07,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539445725] [2021-11-03 04:15:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:07,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:10,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:10,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539445725] [2021-11-03 04:15:10,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539445725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:10,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:10,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-03 04:15:10,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820015276] [2021-11-03 04:15:10,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:15:10,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:15:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:15:10,524 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:14,644 INFO L93 Difference]: Finished difference Result 183 states and 223 transitions. [2021-11-03 04:15:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:15:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:15:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:14,647 INFO L225 Difference]: With dead ends: 183 [2021-11-03 04:15:14,648 INFO L226 Difference]: Without dead ends: 127 [2021-11-03 04:15:14,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=424, Invalid=1216, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:15:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-03 04:15:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-03 04:15:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2021-11-03 04:15:14,676 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 45 [2021-11-03 04:15:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:14,677 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2021-11-03 04:15:14,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2021-11-03 04:15:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:15:14,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:14,684 INFO L513 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] [2021-11-03 04:15:14,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:15:14,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash 202384216, now seen corresponding path program 1 times [2021-11-03 04:15:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:14,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597524144] [2021-11-03 04:15:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:14,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:14,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:14,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597524144] [2021-11-03 04:15:14,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597524144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:14,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:14,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:14,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830763875] [2021-11-03 04:15:14,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:14,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:14,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:14,776 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:14,817 INFO L93 Difference]: Finished difference Result 255 states and 318 transitions. [2021-11-03 04:15:14,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:15:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:14,820 INFO L225 Difference]: With dead ends: 255 [2021-11-03 04:15:14,821 INFO L226 Difference]: Without dead ends: 175 [2021-11-03 04:15:14,821 INFO L786 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 [2021-11-03 04:15:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-03 04:15:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 161. [2021-11-03 04:15:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.21875) internal successors, (195), 160 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2021-11-03 04:15:14,844 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 58 [2021-11-03 04:15:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:14,845 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2021-11-03 04:15:14,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2021-11-03 04:15:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:15:14,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:14,849 INFO L513 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] [2021-11-03 04:15:14,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:15:14,850 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash 101984674, now seen corresponding path program 1 times [2021-11-03 04:15:14,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:14,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571465869] [2021-11-03 04:15:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:14,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:14,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:14,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571465869] [2021-11-03 04:15:14,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571465869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:14,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:14,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:14,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556349752] [2021-11-03 04:15:14,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:14,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:14,948 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:14,982 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2021-11-03 04:15:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 04:15:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:14,986 INFO L225 Difference]: With dead ends: 375 [2021-11-03 04:15:14,986 INFO L226 Difference]: Without dead ends: 259 [2021-11-03 04:15:14,988 INFO L786 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 [2021-11-03 04:15:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-03 04:15:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2021-11-03 04:15:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.2375) internal successors, (297), 240 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2021-11-03 04:15:15,033 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 61 [2021-11-03 04:15:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:15,034 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2021-11-03 04:15:15,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2021-11-03 04:15:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:15:15,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:15,035 INFO L513 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] [2021-11-03 04:15:15,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:15:15,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1311643710, now seen corresponding path program 1 times [2021-11-03 04:15:15,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:15,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706668572] [2021-11-03 04:15:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:15,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:15,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:15,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706668572] [2021-11-03 04:15:15,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706668572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:15,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:15,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:15,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969184522] [2021-11-03 04:15:15,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:15,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:15,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:15,086 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:15,137 INFO L93 Difference]: Finished difference Result 627 states and 794 transitions. [2021-11-03 04:15:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 04:15:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:15,141 INFO L225 Difference]: With dead ends: 627 [2021-11-03 04:15:15,141 INFO L226 Difference]: Without dead ends: 431 [2021-11-03 04:15:15,142 INFO L786 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 [2021-11-03 04:15:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-03 04:15:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 405. [2021-11-03 04:15:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.25) internal successors, (505), 404 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 505 transitions. [2021-11-03 04:15:15,186 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 505 transitions. Word has length 64 [2021-11-03 04:15:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:15,186 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 505 transitions. [2021-11-03 04:15:15,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 505 transitions. [2021-11-03 04:15:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:15:15,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:15,188 INFO L513 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] [2021-11-03 04:15:15,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:15:15,188 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1704765954, now seen corresponding path program 1 times [2021-11-03 04:15:15,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:15,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585183308] [2021-11-03 04:15:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:15,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:15,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:15,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585183308] [2021-11-03 04:15:15,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585183308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:15,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:15,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:15,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173779671] [2021-11-03 04:15:15,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:15,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:15,253 INFO L87 Difference]: Start difference. First operand 405 states and 505 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:15,344 INFO L93 Difference]: Finished difference Result 941 states and 1190 transitions. [2021-11-03 04:15:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:15:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:15,349 INFO L225 Difference]: With dead ends: 941 [2021-11-03 04:15:15,349 INFO L226 Difference]: Without dead ends: 581 [2021-11-03 04:15:15,350 INFO L786 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 [2021-11-03 04:15:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-03 04:15:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2021-11-03 04:15:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.2525951557093427) internal successors, (724), 578 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 724 transitions. [2021-11-03 04:15:15,403 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 724 transitions. Word has length 69 [2021-11-03 04:15:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:15,404 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 724 transitions. [2021-11-03 04:15:15,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 724 transitions. [2021-11-03 04:15:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:15:15,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:15,405 INFO L513 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] [2021-11-03 04:15:15,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:15:15,406 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash -425905702, now seen corresponding path program 1 times [2021-11-03 04:15:15,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:15,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869770735] [2021-11-03 04:15:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:15,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:15,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:15,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869770735] [2021-11-03 04:15:15,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869770735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:15,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:15,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 04:15:15,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090469375] [2021-11-03 04:15:15,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:15:15,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:15:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:15:15,508 INFO L87 Difference]: Start difference. First operand 579 states and 724 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:15,722 INFO L93 Difference]: Finished difference Result 740 states and 914 transitions. [2021-11-03 04:15:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 04:15:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:15:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:15,727 INFO L225 Difference]: With dead ends: 740 [2021-11-03 04:15:15,727 INFO L226 Difference]: Without dead ends: 738 [2021-11-03 04:15:15,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:15:15,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-03 04:15:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 579. [2021-11-03 04:15:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.2387543252595157) internal successors, (716), 578 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 716 transitions. [2021-11-03 04:15:15,819 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 716 transitions. Word has length 70 [2021-11-03 04:15:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:15,821 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 716 transitions. [2021-11-03 04:15:15,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 716 transitions. [2021-11-03 04:15:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:15:15,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:15,822 INFO L513 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, 1, 1] [2021-11-03 04:15:15,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:15:15,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 70109631, now seen corresponding path program 1 times [2021-11-03 04:15:15,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:15,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034624278] [2021-11-03 04:15:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:15,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:23,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:23,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034624278] [2021-11-03 04:15:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034624278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:15:23,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480744889] [2021-11-03 04:15:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:23,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:15:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:15:23,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:15:23,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5326a9b2-2407-4dd3-a4d6-1ec1ff9c4144/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:15:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-03 04:15:23,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:47,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:11,229 WARN L207 SmtUtils]: Spent 12.60 s on a formula simplification. DAG size of input: 1387 DAG size of output: 1350