./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7 --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 53c628562139f348a432948065ec43f1ca859b0a402aa2530432925237a49f95 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:25:00,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:25:00,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:25:00,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:25:00,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:25:00,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:25:00,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:25:00,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:25:00,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:25:00,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:25:00,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:25:00,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:25:00,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:25:00,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:25:00,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:25:00,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:25:00,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:25:00,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:25:00,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:25:00,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:25:00,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:25:00,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:25:00,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:25:00,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:25:00,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:25:00,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:25:00,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:25:00,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:25:00,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:25:00,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:25:00,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:25:00,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:25:00,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:25:00,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:25:00,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:25:00,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:25:00,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:25:00,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:25:00,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:25:00,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:25:00,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:25:00,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:25:00,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:25:00,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:25:00,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:25:00,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:25:00,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:25:00,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:25:00,573 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:25:00,573 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:25:00,573 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:25:00,573 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:25:00,575 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:25:00,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:25:00,575 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:25:00,575 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:25:00,576 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:25:00,576 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:25:00,576 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:25:00,576 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:25:00,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:25:00,578 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:25:00,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:25:00,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:25:00,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:25:00,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:25:00,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:25:00,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:25:00,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:25:00,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:25:00,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:25:00,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:25:00,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:25:00,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:25:00,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:25:00,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:25:00,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:25:00,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:25:00,583 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:25:00,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:25:00,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:25:00,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:25:00,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:25:00,584 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_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53c628562139f348a432948065ec43f1ca859b0a402aa2530432925237a49f95 [2021-11-25 19:25:00,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:25:00,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:25:00,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:25:00,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:25:00,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:25:00,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-25 19:25:00,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/data/9f99a734c/c21159134eb047319be1c427c1ce2bbe/FLAGea4ad24d0 [2021-11-25 19:25:01,683 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:25:01,684 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-25 19:25:01,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/data/9f99a734c/c21159134eb047319be1c427c1ce2bbe/FLAGea4ad24d0 [2021-11-25 19:25:01,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/data/9f99a734c/c21159134eb047319be1c427c1ce2bbe [2021-11-25 19:25:01,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:25:01,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:25:01,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:25:01,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:25:01,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:25:01,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:25:01" (1/1) ... [2021-11-25 19:25:01,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6137c84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:01, skipping insertion in model container [2021-11-25 19:25:01,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:25:01" (1/1) ... [2021-11-25 19:25:01,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:25:02,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:25:02,711 WARN L230 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_f02b5be3-8a74-4194-9583-a16d9aa78b40/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34889,34902] [2021-11-25 19:25:02,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:25:02,976 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:25:03,316 WARN L230 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_f02b5be3-8a74-4194-9583-a16d9aa78b40/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34889,34902] [2021-11-25 19:25:03,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:25:03,494 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:25:03,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03 WrapperNode [2021-11-25 19:25:03,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:25:03,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:25:03,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:25:03,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:25:03,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,641 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2898 [2021-11-25 19:25:03,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:25:03,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:25:03,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:25:03,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:25:03,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:25:03,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:25:03,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:25:03,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:25:03,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (1/1) ... [2021-11-25 19:25:03,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:25:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:25:03,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:25:03,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f02b5be3-8a74-4194-9583-a16d9aa78b40/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:25:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:25:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:25:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:25:03,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:25:04,134 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:25:04,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:25:06,330 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:25:07,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:25:07,282 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:25:07,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:25:07 BoogieIcfgContainer [2021-11-25 19:25:07,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:25:07,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:25:07,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:25:07,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:25:07,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:25:01" (1/3) ... [2021-11-25 19:25:07,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc9552d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:25:07, skipping insertion in model container [2021-11-25 19:25:07,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:25:03" (2/3) ... [2021-11-25 19:25:07,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc9552d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:25:07, skipping insertion in model container [2021-11-25 19:25:07,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:25:07" (3/3) ... [2021-11-25 19:25:07,296 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-25 19:25:07,301 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:25:07,302 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:25:07,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:25:07,381 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 [2021-11-25 19:25:07,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:25:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 618 states, 616 states have (on average 1.7224025974025974) internal successors, (1061), 617 states have internal predecessors, (1061), 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) [2021-11-25 19:25:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-25 19:25:07,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:07,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:07,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -460886294, now seen corresponding path program 1 times [2021-11-25 19:25:07,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:07,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533987756] [2021-11-25 19:25:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:07,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:09,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533987756] [2021-11-25 19:25:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533987756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:09,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:09,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:09,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072357909] [2021-11-25 19:25:09,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:09,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:09,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:09,180 INFO L87 Difference]: Start difference. First operand has 618 states, 616 states have (on average 1.7224025974025974) internal successors, (1061), 617 states have internal predecessors, (1061), 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 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 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) [2021-11-25 19:25:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:09,646 INFO L93 Difference]: Finished difference Result 1818 states and 3124 transitions. [2021-11-25 19:25:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:09,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 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 251 [2021-11-25 19:25:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:09,676 INFO L225 Difference]: With dead ends: 1818 [2021-11-25 19:25:09,676 INFO L226 Difference]: Without dead ends: 1205 [2021-11-25 19:25:09,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:09,688 INFO L933 BasicCegarLoop]: 1330 mSDtfsCounter, 2666 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2666 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:09,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2666 Valid, 2284 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:25:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-25 19:25:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2021-11-25 19:25:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.456738768718802) internal successors, (1751), 1202 states have internal predecessors, (1751), 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) [2021-11-25 19:25:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1751 transitions. [2021-11-25 19:25:09,854 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1751 transitions. Word has length 251 [2021-11-25 19:25:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:09,857 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1751 transitions. [2021-11-25 19:25:09,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 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) [2021-11-25 19:25:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1751 transitions. [2021-11-25 19:25:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-25 19:25:09,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:09,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:25:09,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:09,878 INFO L85 PathProgramCache]: Analyzing trace with hash -440573878, now seen corresponding path program 1 times [2021-11-25 19:25:09,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:09,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749407682] [2021-11-25 19:25:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:09,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:10,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:10,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749407682] [2021-11-25 19:25:10,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749407682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:10,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:10,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:10,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17700728] [2021-11-25 19:25:10,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:10,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:10,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:10,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:10,052 INFO L87 Difference]: Start difference. First operand 1203 states and 1751 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-25 19:25:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:10,468 INFO L93 Difference]: Finished difference Result 3581 states and 5211 transitions. [2021-11-25 19:25:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 253 [2021-11-25 19:25:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:10,488 INFO L225 Difference]: With dead ends: 3581 [2021-11-25 19:25:10,488 INFO L226 Difference]: Without dead ends: 2395 [2021-11-25 19:25:10,495 INFO L932 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 [2021-11-25 19:25:10,497 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 892 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:10,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 2548 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-11-25 19:25:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1206. [2021-11-25 19:25:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 1.4556016597510373) internal successors, (1754), 1205 states have internal predecessors, (1754), 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) [2021-11-25 19:25:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1754 transitions. [2021-11-25 19:25:10,588 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1754 transitions. Word has length 253 [2021-11-25 19:25:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1754 transitions. [2021-11-25 19:25:10,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-25 19:25:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1754 transitions. [2021-11-25 19:25:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-25 19:25:10,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:10,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:10,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:25:10,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1774589808, now seen corresponding path program 1 times [2021-11-25 19:25:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:10,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135695456] [2021-11-25 19:25:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:10,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:10,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:10,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135695456] [2021-11-25 19:25:10,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135695456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:10,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:10,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:10,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762220588] [2021-11-25 19:25:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:10,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:10,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:10,831 INFO L87 Difference]: Start difference. First operand 1206 states and 1754 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-25 19:25:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:11,237 INFO L93 Difference]: Finished difference Result 3443 states and 4990 transitions. [2021-11-25 19:25:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 253 [2021-11-25 19:25:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:11,253 INFO L225 Difference]: With dead ends: 3443 [2021-11-25 19:25:11,253 INFO L226 Difference]: Without dead ends: 2361 [2021-11-25 19:25:11,255 INFO L932 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 [2021-11-25 19:25:11,264 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 787 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:11,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2469 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-11-25 19:25:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2359. [2021-11-25 19:25:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 1.4495335029686174) internal successors, (3418), 2358 states have internal predecessors, (3418), 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) [2021-11-25 19:25:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3418 transitions. [2021-11-25 19:25:11,450 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3418 transitions. Word has length 253 [2021-11-25 19:25:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 3418 transitions. [2021-11-25 19:25:11,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-25 19:25:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3418 transitions. [2021-11-25 19:25:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-25 19:25:11,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:11,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:11,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:25:11,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 234879895, now seen corresponding path program 1 times [2021-11-25 19:25:11,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946942405] [2021-11-25 19:25:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:11,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:11,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946942405] [2021-11-25 19:25:11,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946942405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:11,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:11,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:11,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427351085] [2021-11-25 19:25:11,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:11,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:11,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:11,653 INFO L87 Difference]: Start difference. First operand 2359 states and 3418 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2021-11-25 19:25:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:12,102 INFO L93 Difference]: Finished difference Result 5061 states and 7434 transitions. [2021-11-25 19:25:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 254 [2021-11-25 19:25:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:12,125 INFO L225 Difference]: With dead ends: 5061 [2021-11-25 19:25:12,126 INFO L226 Difference]: Without dead ends: 3345 [2021-11-25 19:25:12,132 INFO L932 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 [2021-11-25 19:25:12,139 INFO L933 BasicCegarLoop]: 1228 mSDtfsCounter, 575 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:12,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1861 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-11-25 19:25:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2739. [2021-11-25 19:25:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.4704163623082542) internal successors, (4026), 2738 states have internal predecessors, (4026), 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) [2021-11-25 19:25:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4026 transitions. [2021-11-25 19:25:12,353 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4026 transitions. Word has length 254 [2021-11-25 19:25:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 4026 transitions. [2021-11-25 19:25:12,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2021-11-25 19:25:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4026 transitions. [2021-11-25 19:25:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-25 19:25:12,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:12,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:12,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:25:12,364 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash 989280651, now seen corresponding path program 1 times [2021-11-25 19:25:12,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:12,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925359915] [2021-11-25 19:25:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:12,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:12,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:12,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925359915] [2021-11-25 19:25:12,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925359915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:12,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:12,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:12,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553419647] [2021-11-25 19:25:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:12,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:25:12,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:25:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:12,869 INFO L87 Difference]: Start difference. First operand 2739 states and 4026 transitions. Second operand has 5 states, 5 states have (on average 50.8) internal successors, (254), 4 states have internal predecessors, (254), 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) [2021-11-25 19:25:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:13,522 INFO L93 Difference]: Finished difference Result 7967 states and 11701 transitions. [2021-11-25 19:25:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 4 states have internal predecessors, (254), 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 254 [2021-11-25 19:25:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:13,563 INFO L225 Difference]: With dead ends: 7967 [2021-11-25 19:25:13,563 INFO L226 Difference]: Without dead ends: 5243 [2021-11-25 19:25:13,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:13,571 INFO L933 BasicCegarLoop]: 1433 mSDtfsCounter, 2524 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:13,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2524 Valid, 2233 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-11-25 19:25:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 5241. [2021-11-25 19:25:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5241 states, 5240 states have (on average 1.460496183206107) internal successors, (7653), 5240 states have internal predecessors, (7653), 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) [2021-11-25 19:25:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5241 states to 5241 states and 7653 transitions. [2021-11-25 19:25:14,050 INFO L78 Accepts]: Start accepts. Automaton has 5241 states and 7653 transitions. Word has length 254 [2021-11-25 19:25:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:14,051 INFO L470 AbstractCegarLoop]: Abstraction has 5241 states and 7653 transitions. [2021-11-25 19:25:14,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 4 states have internal predecessors, (254), 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) [2021-11-25 19:25:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5241 states and 7653 transitions. [2021-11-25 19:25:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-25 19:25:14,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:14,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:14,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:25:14,066 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1766764800, now seen corresponding path program 1 times [2021-11-25 19:25:14,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:14,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890980116] [2021-11-25 19:25:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:14,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:14,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:14,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890980116] [2021-11-25 19:25:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890980116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:14,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:14,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:14,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730919257] [2021-11-25 19:25:14,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:14,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:14,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:14,630 INFO L87 Difference]: Start difference. First operand 5241 states and 7653 transitions. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-11-25 19:25:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:15,703 INFO L93 Difference]: Finished difference Result 15174 states and 22111 transitions. [2021-11-25 19:25:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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 255 [2021-11-25 19:25:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:15,789 INFO L225 Difference]: With dead ends: 15174 [2021-11-25 19:25:15,789 INFO L226 Difference]: Without dead ends: 10071 [2021-11-25 19:25:15,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:15,800 INFO L933 BasicCegarLoop]: 1425 mSDtfsCounter, 1895 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:15,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 2229 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10071 states. [2021-11-25 19:25:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10071 to 10069. [2021-11-25 19:25:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10069 states, 10068 states have (on average 1.4489471593166467) internal successors, (14588), 10068 states have internal predecessors, (14588), 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) [2021-11-25 19:25:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10069 states to 10069 states and 14588 transitions. [2021-11-25 19:25:16,706 INFO L78 Accepts]: Start accepts. Automaton has 10069 states and 14588 transitions. Word has length 255 [2021-11-25 19:25:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:16,706 INFO L470 AbstractCegarLoop]: Abstraction has 10069 states and 14588 transitions. [2021-11-25 19:25:16,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-11-25 19:25:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 10069 states and 14588 transitions. [2021-11-25 19:25:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-25 19:25:16,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:16,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:16,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:25:16,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1859185827, now seen corresponding path program 1 times [2021-11-25 19:25:16,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:16,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909652592] [2021-11-25 19:25:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:16,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:17,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909652592] [2021-11-25 19:25:17,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909652592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:17,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:17,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:17,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508225728] [2021-11-25 19:25:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:17,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:17,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:17,200 INFO L87 Difference]: Start difference. First operand 10069 states and 14588 transitions. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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) [2021-11-25 19:25:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:18,692 INFO L93 Difference]: Finished difference Result 29533 states and 42715 transitions. [2021-11-25 19:25:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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 257 [2021-11-25 19:25:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:18,755 INFO L225 Difference]: With dead ends: 29533 [2021-11-25 19:25:18,756 INFO L226 Difference]: Without dead ends: 19606 [2021-11-25 19:25:18,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:18,774 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 2191 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:18,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 1899 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19606 states. [2021-11-25 19:25:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19606 to 19604. [2021-11-25 19:25:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19604 states, 19603 states have (on average 1.437943171963475) internal successors, (28188), 19603 states have internal predecessors, (28188), 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) [2021-11-25 19:25:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19604 states to 19604 states and 28188 transitions. [2021-11-25 19:25:20,296 INFO L78 Accepts]: Start accepts. Automaton has 19604 states and 28188 transitions. Word has length 257 [2021-11-25 19:25:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:20,297 INFO L470 AbstractCegarLoop]: Abstraction has 19604 states and 28188 transitions. [2021-11-25 19:25:20,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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) [2021-11-25 19:25:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 19604 states and 28188 transitions. [2021-11-25 19:25:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-25 19:25:20,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:20,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:20,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:25:20,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash -91062278, now seen corresponding path program 1 times [2021-11-25 19:25:20,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:20,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808532691] [2021-11-25 19:25:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:20,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:20,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808532691] [2021-11-25 19:25:20,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808532691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:20,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:20,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:20,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725379648] [2021-11-25 19:25:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:20,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:20,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:20,556 INFO L87 Difference]: Start difference. First operand 19604 states and 28188 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-25 19:25:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:22,654 INFO L93 Difference]: Finished difference Result 56339 states and 80733 transitions. [2021-11-25 19:25:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 259 [2021-11-25 19:25:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:22,740 INFO L225 Difference]: With dead ends: 56339 [2021-11-25 19:25:22,741 INFO L226 Difference]: Without dead ends: 38297 [2021-11-25 19:25:22,774 INFO L932 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 [2021-11-25 19:25:22,775 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 767 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:22,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 2439 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38297 states. [2021-11-25 19:25:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38297 to 38295. [2021-11-25 19:25:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38295 states, 38294 states have (on average 1.4296495534548492) internal successors, (54747), 38294 states have internal predecessors, (54747), 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) [2021-11-25 19:25:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38295 states to 38295 states and 54747 transitions. [2021-11-25 19:25:25,300 INFO L78 Accepts]: Start accepts. Automaton has 38295 states and 54747 transitions. Word has length 259 [2021-11-25 19:25:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:25,300 INFO L470 AbstractCegarLoop]: Abstraction has 38295 states and 54747 transitions. [2021-11-25 19:25:25,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-25 19:25:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 38295 states and 54747 transitions. [2021-11-25 19:25:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-25 19:25:25,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:25,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:25,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:25:25,374 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -447607992, now seen corresponding path program 1 times [2021-11-25 19:25:25,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:25,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125498187] [2021-11-25 19:25:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:25,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:25,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:25,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125498187] [2021-11-25 19:25:25,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125498187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:25,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:25,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:25,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454536764] [2021-11-25 19:25:25,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:25,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:25,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:25,476 INFO L87 Difference]: Start difference. First operand 38295 states and 54747 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-25 19:25:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:29,571 INFO L93 Difference]: Finished difference Result 112950 states and 161359 transitions. [2021-11-25 19:25:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 259 [2021-11-25 19:25:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:29,791 INFO L225 Difference]: With dead ends: 112950 [2021-11-25 19:25:29,792 INFO L226 Difference]: Without dead ends: 76341 [2021-11-25 19:25:29,866 INFO L932 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 [2021-11-25 19:25:29,866 INFO L933 BasicCegarLoop]: 1673 mSDtfsCounter, 865 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:29,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2518 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:25:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76341 states. [2021-11-25 19:25:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76341 to 38328. [2021-11-25 19:25:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38328 states, 38327 states have (on average 1.4292796201111488) internal successors, (54780), 38327 states have internal predecessors, (54780), 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) [2021-11-25 19:25:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38328 states to 38328 states and 54780 transitions. [2021-11-25 19:25:32,760 INFO L78 Accepts]: Start accepts. Automaton has 38328 states and 54780 transitions. Word has length 259 [2021-11-25 19:25:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:32,760 INFO L470 AbstractCegarLoop]: Abstraction has 38328 states and 54780 transitions. [2021-11-25 19:25:32,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-25 19:25:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38328 states and 54780 transitions. [2021-11-25 19:25:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-25 19:25:32,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:32,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:32,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:25:32,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash 742413956, now seen corresponding path program 1 times [2021-11-25 19:25:32,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:32,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724338464] [2021-11-25 19:25:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:32,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:32,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:32,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724338464] [2021-11-25 19:25:32,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724338464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:32,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:32,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:32,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876430696] [2021-11-25 19:25:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:32,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:32,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:32,919 INFO L87 Difference]: Start difference. First operand 38328 states and 54780 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-11-25 19:25:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:36,190 INFO L93 Difference]: Finished difference Result 83684 states and 121998 transitions. [2021-11-25 19:25:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 260 [2021-11-25 19:25:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:36,323 INFO L225 Difference]: With dead ends: 83684 [2021-11-25 19:25:36,324 INFO L226 Difference]: Without dead ends: 54782 [2021-11-25 19:25:36,377 INFO L932 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 [2021-11-25 19:25:36,378 INFO L933 BasicCegarLoop]: 1160 mSDtfsCounter, 506 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:36,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1793 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:25:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54782 states. [2021-11-25 19:25:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54782 to 47868. [2021-11-25 19:25:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47868 states, 47867 states have (on average 1.4604633672467462) internal successors, (69908), 47867 states have internal predecessors, (69908), 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) [2021-11-25 19:25:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47868 states to 47868 states and 69908 transitions. [2021-11-25 19:25:39,691 INFO L78 Accepts]: Start accepts. Automaton has 47868 states and 69908 transitions. Word has length 260 [2021-11-25 19:25:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:39,692 INFO L470 AbstractCegarLoop]: Abstraction has 47868 states and 69908 transitions. [2021-11-25 19:25:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-11-25 19:25:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 47868 states and 69908 transitions. [2021-11-25 19:25:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-25 19:25:39,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:39,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:39,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:25:39,743 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1828577967, now seen corresponding path program 1 times [2021-11-25 19:25:39,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024267989] [2021-11-25 19:25:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:39,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:40,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:40,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024267989] [2021-11-25 19:25:40,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024267989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:40,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:40,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:40,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747204581] [2021-11-25 19:25:40,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:40,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:25:40,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:25:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:40,287 INFO L87 Difference]: Start difference. First operand 47868 states and 69908 transitions. Second operand has 5 states, 5 states have (on average 52.0) internal successors, (260), 4 states have internal predecessors, (260), 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) [2021-11-25 19:25:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:45,963 INFO L93 Difference]: Finished difference Result 139791 states and 204051 transitions. [2021-11-25 19:25:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.0) internal successors, (260), 4 states have internal predecessors, (260), 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 260 [2021-11-25 19:25:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:46,334 INFO L225 Difference]: With dead ends: 139791 [2021-11-25 19:25:46,334 INFO L226 Difference]: Without dead ends: 92123 [2021-11-25 19:25:46,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:46,393 INFO L933 BasicCegarLoop]: 1410 mSDtfsCounter, 1976 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:46,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1976 Valid, 3012 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:25:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92123 states. [2021-11-25 19:25:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92123 to 92121. [2021-11-25 19:25:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92121 states, 92120 states have (on average 1.4528766825879287) internal successors, (133839), 92120 states have internal predecessors, (133839), 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) [2021-11-25 19:25:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92121 states to 92121 states and 133839 transitions. [2021-11-25 19:25:52,761 INFO L78 Accepts]: Start accepts. Automaton has 92121 states and 133839 transitions. Word has length 260 [2021-11-25 19:25:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:52,761 INFO L470 AbstractCegarLoop]: Abstraction has 92121 states and 133839 transitions. [2021-11-25 19:25:52,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.0) internal successors, (260), 4 states have internal predecessors, (260), 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) [2021-11-25 19:25:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 92121 states and 133839 transitions. [2021-11-25 19:25:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-25 19:25:52,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:52,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:52,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:25:52,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1759283221, now seen corresponding path program 1 times [2021-11-25 19:25:52,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421472219] [2021-11-25 19:25:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:52,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:25:53,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421472219] [2021-11-25 19:25:53,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421472219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:53,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:53,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:53,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713443908] [2021-11-25 19:25:53,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:53,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:53,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:53,571 INFO L87 Difference]: Start difference. First operand 92121 states and 133839 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 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)