./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba --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 64bit --witnessprinter.graph.data.programhash e21b5d9af58d503b543d8ada0d1f774dde2fb8cf43da8014b4dc75fe011ac352 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:22:45,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:22:45,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:22:45,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:22:45,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:22:45,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:22:45,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:22:45,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:22:45,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:22:45,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:22:45,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:22:45,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:22:45,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:22:45,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:22:45,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:22:45,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:22:45,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:22:45,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:22:45,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:22:45,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:22:45,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:22:45,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:22:45,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:22:45,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:22:45,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:22:45,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:22:45,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:22:45,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:22:45,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:22:45,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:22:45,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:22:45,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:22:45,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:22:45,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:22:45,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:22:45,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:22:45,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:22:45,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:22:45,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:22:45,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:22:45,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:22:45,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 00:22:45,774 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:22:45,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:22:45,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:22:45,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:22:45,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:22:45,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:22:45,776 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:22:45,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:22:45,776 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:22:45,777 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:22:45,778 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:22:45,778 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:22:45,778 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:22:45,778 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:22:45,778 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:22:45,779 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:22:45,779 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:22:45,779 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:22:45,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:22:45,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:22:45,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:22:45,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:22:45,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:22:45,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:22:45,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:22:45,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:22:45,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:22:45,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:22:45,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:22:45,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:22:45,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:22:45,783 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:22:45,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:22:45,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:22:45,783 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:22:45,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:22:45,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:22:45,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:22:45,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e21b5d9af58d503b543d8ada0d1f774dde2fb8cf43da8014b4dc75fe011ac352 [2022-11-22 00:22:46,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:22:46,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:22:46,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:22:46,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:22:46,102 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:22:46,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2022-11-22 00:22:49,202 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:22:49,529 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:22:49,529 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2022-11-22 00:22:49,552 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/data/4da61479d/1d0c46cc024d4bb78f0e9221c684016b/FLAG92b48f772 [2022-11-22 00:22:49,566 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/data/4da61479d/1d0c46cc024d4bb78f0e9221c684016b [2022-11-22 00:22:49,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:22:49,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:22:49,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:22:49,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:22:49,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:22:49,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:22:49" (1/1) ... [2022-11-22 00:22:49,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f441691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:49, skipping insertion in model container [2022-11-22 00:22:49,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:22:49" (1/1) ... [2022-11-22 00:22:49,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:22:49,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:22:49,807 WARN L237 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_e821bf68-e936-4ceb-9012-f49bec4665dd/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c[1107,1120] [2022-11-22 00:22:50,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:22:50,173 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:22:50,185 WARN L237 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_e821bf68-e936-4ceb-9012-f49bec4665dd/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.safe_linked_list_fifo_n2d4.c[1107,1120] [2022-11-22 00:22:50,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:22:50,314 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:22:50,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50 WrapperNode [2022-11-22 00:22:50,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:22:50,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:22:50,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:22:50,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:22:50,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,440 INFO L138 Inliner]: procedures = 15, calls = 102, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1472 [2022-11-22 00:22:50,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:22:50,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:22:50,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:22:50,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:22:50,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:22:50,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:22:50,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:22:50,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:22:50,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (1/1) ... [2022-11-22 00:22:50,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:22:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:22:50,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:22:50,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:22:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:22:50,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:22:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:22:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:22:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:22:50,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:22:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:22:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:22:51,196 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:22:51,198 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:22:54,403 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:22:54,647 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:22:54,647 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-22 00:22:54,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:22:54 BoogieIcfgContainer [2022-11-22 00:22:54,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:22:54,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:22:54,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:22:54,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:22:54,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:22:49" (1/3) ... [2022-11-22 00:22:54,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3350e6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:22:54, skipping insertion in model container [2022-11-22 00:22:54,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:22:50" (2/3) ... [2022-11-22 00:22:54,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3350e6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:22:54, skipping insertion in model container [2022-11-22 00:22:54,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:22:54" (3/3) ... [2022-11-22 00:22:54,659 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.safe_linked_list_fifo_n2d4.c [2022-11-22 00:22:54,677 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:22:54,677 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:22:54,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:22:54,731 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5adfe6b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:22:54,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:22:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:22:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:22:54,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:22:54,744 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:22:54,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:22:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:22:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1432321088, now seen corresponding path program 1 times [2022-11-22 00:22:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:22:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201328535] [2022-11-22 00:22:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:22:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:22:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 00:22:55,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:22:55,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201328535] [2022-11-22 00:22:55,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201328535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:22:55,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:22:55,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:22:55,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616552512] [2022-11-22 00:22:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:22:55,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:22:55,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:22:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:22:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:22:55,888 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:22:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:22:56,872 INFO L93 Difference]: Finished difference Result 72 states and 119 transitions. [2022-11-22 00:22:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:22:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 27 [2022-11-22 00:22:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:22:56,882 INFO L225 Difference]: With dead ends: 72 [2022-11-22 00:22:56,882 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 00:22:56,886 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:22:56,891 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:22:56,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:22:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 00:22:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-22 00:22:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:22:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2022-11-22 00:22:56,944 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 27 [2022-11-22 00:22:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:22:56,945 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2022-11-22 00:22:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:22:56,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2022-11-22 00:22:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 00:22:56,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:22:56,947 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:22:56,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:22:56,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:22:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:22:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1523799713, now seen corresponding path program 1 times [2022-11-22 00:22:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:22:56,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244573190] [2022-11-22 00:22:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:22:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:22:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 00:22:57,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:22:57,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244573190] [2022-11-22 00:22:57,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244573190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:22:57,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969943845] [2022-11-22 00:22:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:57,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:22:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:22:57,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:22:57,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:22:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:22:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:22:58,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:22:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 00:22:58,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:22:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:22:58,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969943845] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:22:58,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:22:58,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:22:58,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404736226] [2022-11-22 00:22:58,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:22:58,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:22:58,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:22:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:22:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:22:58,274 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:22:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:22:59,687 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2022-11-22 00:22:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:22:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2022-11-22 00:22:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:22:59,688 INFO L225 Difference]: With dead ends: 70 [2022-11-22 00:22:59,688 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 00:22:59,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:22:59,690 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:22:59,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 00:22:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 00:22:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-22 00:22:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:22:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 60 transitions. [2022-11-22 00:22:59,698 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 60 transitions. Word has length 28 [2022-11-22 00:22:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:22:59,698 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 60 transitions. [2022-11-22 00:22:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:22:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 60 transitions. [2022-11-22 00:22:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 00:22:59,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:22:59,700 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:22:59,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:22:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:22:59,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:22:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:22:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1178371353, now seen corresponding path program 1 times [2022-11-22 00:22:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:22:59,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978144740] [2022-11-22 00:22:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:59,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:23:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:23:00,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:23:00,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978144740] [2022-11-22 00:23:00,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978144740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:23:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657726450] [2022-11-22 00:23:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:00,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:23:00,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:23:00,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:23:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:23:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:23:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:23:01,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:23:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:23:01,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657726450] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:23:01,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:23:01,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:23:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979277711] [2022-11-22 00:23:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:23:01,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:23:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:23:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:23:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:23:01,425 INFO L87 Difference]: Start difference. First operand 38 states and 60 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:23:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:23:02,006 INFO L93 Difference]: Finished difference Result 73 states and 116 transitions. [2022-11-22 00:23:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:23:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-11-22 00:23:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:23:02,008 INFO L225 Difference]: With dead ends: 73 [2022-11-22 00:23:02,008 INFO L226 Difference]: Without dead ends: 39 [2022-11-22 00:23:02,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:23:02,010 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:23:02,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:23:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-22 00:23:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-22 00:23:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:23:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 61 transitions. [2022-11-22 00:23:02,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 61 transitions. Word has length 29 [2022-11-22 00:23:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:23:02,016 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 61 transitions. [2022-11-22 00:23:02,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:23:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 61 transitions. [2022-11-22 00:23:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 00:23:02,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:23:02,018 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:23:02,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:23:02,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:02,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:23:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:23:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1362070592, now seen corresponding path program 1 times [2022-11-22 00:23:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:23:02,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156395041] [2022-11-22 00:23:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:23:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:23:02,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:23:02,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156395041] [2022-11-22 00:23:02,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156395041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:23:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498665096] [2022-11-22 00:23:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:02,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:23:02,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:23:02,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:23:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 00:23:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:23:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:23:04,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:23:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:23:04,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498665096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:23:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61306007] [2022-11-22 00:23:04,116 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 00:23:04,116 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:23:04,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:23:04,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:23:04,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:23:04,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:23:04,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-22 00:23:04,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-22 00:23:05,282 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-22 00:23:05,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 652 treesize of output 659 [2022-11-22 00:23:06,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:23:07,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:23:07,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:23:07,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-22 00:23:07,857 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-22 00:23:07,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 499 [2022-11-22 00:23:08,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:23:09,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:23:09,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:23:09,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:23:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:23:10,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 96 [2022-11-22 00:23:10,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:23:19,292 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2022-11-22 00:23:19,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:23:53,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1128#(and (<= 1 |ULTIMATE.start_main_~var_93_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_25_arg_0~0#1|) (<= 33554432 |ULTIMATE.start_main_~msb_SORT_234~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_240~0#1| 1) 0) (<= (+ |ULTIMATE.start_main_~mask_SORT_238~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_240~0#1| 1)) (<= 1023 |ULTIMATE.start_main_~mask_SORT_202~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_244~0#1| 1)) (<= 0 |ULTIMATE.start_main_~var_21~0#1|) (<= 2097152 |ULTIMATE.start_main_~msb_SORT_226~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_216~0#1| 65536) (<= |ULTIMATE.start_main_~msb_SORT_212~0#1| 16384) (<= 2147483648 |ULTIMATE.start_main_~msb_SORT_156~0#1|) (<= |ULTIMATE.start_main_~var_530~0#1| 1) (<= |ULTIMATE.start_main_~#state_13~0#1.offset| 0) (<= 4096 |ULTIMATE.start_main_~msb_SORT_208~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_222~0#1| 1)) (<= 7 |ULTIMATE.start_main_~mask_SORT_19~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~msb_SORT_214~0#1| 32768) (<= |ULTIMATE.start_main_~msb_SORT_191~0#1| 8) (<= |ULTIMATE.start_main_~msb_SORT_156~0#1| 2147483648) (<= 0 |ULTIMATE.start_main_~#state_249~0#1.offset|) (<= |ULTIMATE.start_main_~msb_SORT_226~0#1| 2097152) (<= |ULTIMATE.start_main_~mask_SORT_200~0#1| 511) (<= |ULTIMATE.start_main_~msb_SORT_197~0#1| 64) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_232~0#1| 1)) (<= (+ |ULTIMATE.start_main_~mask_SORT_242~0#1| 1) 0) (<= 256 |ULTIMATE.start_main_~msb_SORT_200~0#1|) (<= |ULTIMATE.start_main_~var_24~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_22_arg_0~0#1|) (<= 1 |ULTIMATE.start_main_~var_530~0#1|) (<= 0 |ULTIMATE.start_main_~#state_13~0#1.base|) (<= 0 |ULTIMATE.start_main_~var_50_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_50_arg_1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_242~0#1| 1)) (<= 0 |ULTIMATE.start_main_~var_508~0#1|) (<= |ULTIMATE.start_main_~var_513~0#1| 3) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~var_93_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_92~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_197~0#1| 127) (<= (+ |ULTIMATE.start_main_~mask_SORT_232~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~var_52_arg_0~0#1|) (<= |ULTIMATE.start_main_~var_83_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_51~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_19~0#1| 7) (<= 8192 |ULTIMATE.start_main_~msb_SORT_210~0#1|) (<= |ULTIMATE.start_main_~var_539~0#1| 2) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_236~0#1| 1)) (<= |ULTIMATE.start_main_~var_21~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_30~0#1|) (<= 1024 |ULTIMATE.start_main_~msb_SORT_204~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_234~0#1| 33554432) (<= |ULTIMATE.start_main_~var_25_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_16_arg_0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#state_13~0#1.offset|) (<= |ULTIMATE.start_main_~msb_SORT_242~0#1| 536870912) (<= (+ |ULTIMATE.start_main_~mask_SORT_224~0#1| 1) 0) (<= 536870912 |ULTIMATE.start_main_~msb_SORT_242~0#1|) (<= 0 |ULTIMATE.start_main_~#state_249~0#1.base|) (<= |ULTIMATE.start_main_~mask_SORT_206~0#1| 4095) (<= |ULTIMATE.start_main_~mask_SORT_204~0#1| 2047) (<= 0 |ULTIMATE.start_main_~var_16_arg_0~0#1.offset|) (<= |ULTIMATE.start_main_~mask_SORT_193~0#1| 31) (<= 2 |ULTIMATE.start_main_~var_539~0#1|) (<= |ULTIMATE.start_main_~var_51~0#1| 1) (<= (+ |ULTIMATE.start_main_~mask_SORT_236~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~var_17_arg_0~0#1.base|) (<= 4 |ULTIMATE.start_main_~msb_SORT_19~0#1|) (<= 1 |ULTIMATE.start_main_~var_77_arg_0~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_220~0#1| 1)) (<= |ULTIMATE.start_main_~mask_SORT_202~0#1| 1023) (<= 32768 |ULTIMATE.start_main_~msb_SORT_214~0#1|) (<= 16777216 |ULTIMATE.start_main_~msb_SORT_232~0#1|) (<= |ULTIMATE.start_main_~#state_249~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~msb_SORT_228~0#1| 4194304) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_224~0#1| 1)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~msb_SORT_193~0#1| 16) (<= 131072 |ULTIMATE.start_main_~msb_SORT_218~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_210~0#1| 8192) (<= |ULTIMATE.start_main_~msb_SORT_206~0#1| 2048) (<= |ULTIMATE.start_main_~var_60~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_156~0#1| 1)) (<= (+ |ULTIMATE.start_main_~mask_SORT_216~0#1| 1) 0) (<= 134217728 |ULTIMATE.start_main_~msb_SORT_238~0#1|) (<= |ULTIMATE.start_main_~var_89_arg_0~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_234~0#1| 1)) (<= |ULTIMATE.start_main_~var_508~0#1| 0) (<= 4194304 |ULTIMATE.start_main_~msb_SORT_228~0#1|) (<= 128 |ULTIMATE.start_main_~msb_SORT_3~0#1|) (<= 64 |ULTIMATE.start_main_~msb_SORT_197~0#1|) (<= 1 |ULTIMATE.start_main_~mask_SORT_1~0#1|) (<= |ULTIMATE.start_main_~var_92~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_83_arg_0~0#1|) (<= |ULTIMATE.start_main_~var_37~0#1| 1) (<= |ULTIMATE.start_main_~var_80_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_401~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_226~0#1| 1)) (<= |ULTIMATE.start_main_~msb_SORT_202~0#1| 512) (<= |ULTIMATE.start_main_~var_29~0#1| 4) (<= 1 |ULTIMATE.start_main_~state_61~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_11~0#1| 2) (<= 0 |ULTIMATE.start_main_~var_37~0#1|) (<= |ULTIMATE.start_main_~init_62_arg_1~0#1| 1) (<= 65535 |ULTIMATE.start_main_~mask_SORT_214~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_218~0#1| 1) 0) (<= |ULTIMATE.start_main_~mask_SORT_3~0#1| 255) (<= |ULTIMATE.start_main_~var_59~0#1| 1) (<= (+ |ULTIMATE.start_main_~mask_SORT_220~0#1| 1) 0) (<= |ULTIMATE.start_main_~state_61~0#1| 1) (<= 127 |ULTIMATE.start_main_~mask_SORT_197~0#1|) (<= 0 |ULTIMATE.start_main_~var_24~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_228~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_232~0#1| 16777216) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_228~0#1| 1)) (<= 2048 |ULTIMATE.start_main_~msb_SORT_206~0#1|) (<= |ULTIMATE.start_main_~var_30_arg_1~0#1| 4) (<= 0 |ULTIMATE.start_main_~#state_15~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 4 |ULTIMATE.start_main_~var_30_arg_1~0#1|) (<= 67108864 |ULTIMATE.start_main_~msb_SORT_236~0#1|) (<= 262144 |ULTIMATE.start_main_~msb_SORT_220~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_222~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_224~0#1| 1048576) (<= 0 |ULTIMATE.start_main_~var_57_arg_1~0#1|) (<= 511 |ULTIMATE.start_main_~mask_SORT_200~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_195~0#1| 63) (<= 2047 |ULTIMATE.start_main_~mask_SORT_204~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_3~0#1| 128) (<= 4 |ULTIMATE.start_main_~var_29~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_208~0#1| 8191) (<= |ULTIMATE.start_main_~var_17_arg_0~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~var_63_arg_2~0#1|) (<= |ULTIMATE.start_main_~var_38_arg_1~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_63_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_60~0#1|) (<= 1 |ULTIMATE.start_main_~var_59~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_204~0#1| 1024) (<= 32 |ULTIMATE.start_main_~msb_SORT_195~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~var_80_arg_0~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_230~0#1| 1) 0) (<= 31 |ULTIMATE.start_main_~mask_SORT_193~0#1|) (<= 1 |ULTIMATE.start_main_~var_92_arg_0~0#1|) (<= 8 |ULTIMATE.start_main_~msb_SORT_191~0#1|) (<= |ULTIMATE.start_main_~var_30~0#1| 1) (<= |ULTIMATE.start_main_~var_49~0#1| 0) (<= 268435456 |ULTIMATE.start_main_~msb_SORT_240~0#1|) (<= 0 |ULTIMATE.start_main_~var_17_arg_0~0#1.offset|) (<= |ULTIMATE.start_main_~msb_SORT_222~0#1| 524288) (<= |ULTIMATE.start_main_~mask_SORT_210~0#1| 16383) (<= 4095 |ULTIMATE.start_main_~mask_SORT_206~0#1|) (<= 8388608 |ULTIMATE.start_main_~msb_SORT_230~0#1|) (<= 15 |ULTIMATE.start_main_~mask_SORT_191~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_200~0#1| 256) (<= |ULTIMATE.start_main_~var_63_arg_0~0#1| 1) (<= 2 |ULTIMATE.start_main_~msb_SORT_11~0#1|) (<= |ULTIMATE.start_main_~var_22_arg_0~0#1| 1) (<= 16384 |ULTIMATE.start_main_~msb_SORT_212~0#1|) (<= 16383 |ULTIMATE.start_main_~mask_SORT_210~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_230~0#1| 8388608) (<= |ULTIMATE.start_main_~msb_SORT_208~0#1| 4096) (<= 3 |ULTIMATE.start_main_~mask_SORT_11~0#1|) (<= 63 |ULTIMATE.start_main_~mask_SORT_195~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_191~0#1| 15) (<= |ULTIMATE.start_main_~#state_15~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~var_94_arg_0~0#1|) (<= 1 |ULTIMATE.start_main_~msb_SORT_1~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_226~0#1| 1) 0) (<= 1048576 |ULTIMATE.start_main_~msb_SORT_224~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 255 |ULTIMATE.start_main_~mask_SORT_3~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_238~0#1| 1)) (<= (+ |ULTIMATE.start_main_~mask_SORT_156~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_240~0#1| 268435456) (<= |ULTIMATE.start_main_~mask_SORT_11~0#1| 3) (<= |ULTIMATE.start_main_~var_77_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_57_arg_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_49~0#1|) (<= 16 |ULTIMATE.start_main_~msb_SORT_193~0#1|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~var_63_arg_1~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_214~0#1| 65535) (<= 32767 |ULTIMATE.start_main_~mask_SORT_212~0#1|) (<= |ULTIMATE.start_main_~var_92_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_236~0#1| 67108864) (<= 1 |ULTIMATE.start_main_~init_62_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_56~0#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_1~0#1| 1) (<= |ULTIMATE.start_main_~var_52_arg_0~0#1| 1) (<= 512 |ULTIMATE.start_main_~msb_SORT_202~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_220~0#1| 262144) (<= 0 |ULTIMATE.start_main_~var_401~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_212~0#1| 32767) (<= 8191 |ULTIMATE.start_main_~mask_SORT_208~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_216~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#state_15~0#1.base|) (<= |ULTIMATE.start_main_~msb_SORT_238~0#1| 134217728) (<= 1073741824 |ULTIMATE.start_main_~msb_SORT_244~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_218~0#1| 131072) (<= |ULTIMATE.start_main_~msb_SORT_19~0#1| 4) (<= 0 |#StackHeapBarrier|) (<= 524288 |ULTIMATE.start_main_~msb_SORT_222~0#1|) (<= |ULTIMATE.start_main_~var_94_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_63_arg_1~0#1| 0) (<= 0 |ULTIMATE.start_main_~var_38_arg_1~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_244~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~var_70_arg_0~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_218~0#1| 1)) (<= 3 |ULTIMATE.start_main_~var_513~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_230~0#1| 1)) (<= 65536 |ULTIMATE.start_main_~msb_SORT_216~0#1|) (<= 0 |ULTIMATE.start_main_~var_56~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_234~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_195~0#1| 32) (<= |ULTIMATE.start_main_~msb_SORT_244~0#1| 1073741824) (<= 0 |ULTIMATE.start_main_~var_16_arg_0~0#1.base|) (<= |ULTIMATE.start_main_~var_70_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_63_arg_2~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_89_arg_0~0#1|))' at error location [2022-11-22 00:23:53,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:23:53,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:23:53,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 8 [2022-11-22 00:23:53,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000339676] [2022-11-22 00:23:53,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:23:53,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:23:53,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:23:53,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:23:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2022-11-22 00:23:53,062 INFO L87 Difference]: Start difference. First operand 39 states and 61 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-22 00:23:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:23:53,787 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2022-11-22 00:23:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:23:53,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 30 [2022-11-22 00:23:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:23:53,788 INFO L225 Difference]: With dead ends: 78 [2022-11-22 00:23:53,788 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 00:23:53,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:23:53,791 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:23:53,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:23:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 00:23:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-22 00:23:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:23:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 64 transitions. [2022-11-22 00:23:53,798 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 64 transitions. Word has length 30 [2022-11-22 00:23:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:23:53,798 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 64 transitions. [2022-11-22 00:23:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-22 00:23:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 64 transitions. [2022-11-22 00:23:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 00:23:53,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:23:53,799 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:23:53,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:23:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:54,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:23:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:23:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 388566495, now seen corresponding path program 2 times [2022-11-22 00:23:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:23:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423512998] [2022-11-22 00:23:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:23:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 00:23:54,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:23:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423512998] [2022-11-22 00:23:54,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423512998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:23:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602405140] [2022-11-22 00:23:54,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:23:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:23:54,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:23:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:23:55,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 00:23:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:23:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:23:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:23:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 00:23:56,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:23:56,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602405140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:23:56,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:23:56,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-22 00:23:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885436542] [2022-11-22 00:23:56,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:23:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:23:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:23:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:23:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:23:56,397 INFO L87 Difference]: Start difference. First operand 42 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:23:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:23:58,435 INFO L93 Difference]: Finished difference Result 83 states and 130 transitions. [2022-11-22 00:23:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:23:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-11-22 00:23:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:23:58,437 INFO L225 Difference]: With dead ends: 83 [2022-11-22 00:23:58,437 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 00:23:58,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:23:58,438 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 152 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:23:58,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 71 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 00:23:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 00:23:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-22 00:23:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:23:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 81 transitions. [2022-11-22 00:23:58,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 81 transitions. Word has length 33 [2022-11-22 00:23:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:23:58,453 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 81 transitions. [2022-11-22 00:23:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:23:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 81 transitions. [2022-11-22 00:23:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 00:23:58,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:23:58,455 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:23:58,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:23:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:58,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:23:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:23:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1441109787, now seen corresponding path program 1 times [2022-11-22 00:23:58,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:23:58,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164062170] [2022-11-22 00:23:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:23:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:23:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-22 00:23:59,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:23:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164062170] [2022-11-22 00:23:59,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164062170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:23:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834960697] [2022-11-22 00:23:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:23:59,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:23:59,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:23:59,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:23:59,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:24:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 00:24:01,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-22 00:24:01,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834960697] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:01,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:01,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:24:01,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994151147] [2022-11-22 00:24:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:01,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:01,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:01,101 INFO L87 Difference]: Start difference. First operand 54 states and 81 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:01,868 INFO L93 Difference]: Finished difference Result 87 states and 134 transitions. [2022-11-22 00:24:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2022-11-22 00:24:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:01,869 INFO L225 Difference]: With dead ends: 87 [2022-11-22 00:24:01,870 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 00:24:01,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:01,871 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:01,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 00:24:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 00:24:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-22 00:24:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 82 transitions. [2022-11-22 00:24:01,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 82 transitions. Word has length 71 [2022-11-22 00:24:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:01,883 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 82 transitions. [2022-11-22 00:24:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 82 transitions. [2022-11-22 00:24:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 00:24:01,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:01,885 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:01,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 00:24:02,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:24:02,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1283929529, now seen corresponding path program 1 times [2022-11-22 00:24:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:02,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518460970] [2022-11-22 00:24:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 00:24:03,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518460970] [2022-11-22 00:24:03,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518460970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643756940] [2022-11-22 00:24:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:03,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:03,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:03,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:24:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-22 00:24:04,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-22 00:24:04,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643756940] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:04,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:04,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:24:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096946640] [2022-11-22 00:24:04,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:04,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:04,355 INFO L87 Difference]: Start difference. First operand 55 states and 82 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:05,094 INFO L93 Difference]: Finished difference Result 89 states and 136 transitions. [2022-11-22 00:24:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 72 [2022-11-22 00:24:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:05,096 INFO L225 Difference]: With dead ends: 89 [2022-11-22 00:24:05,096 INFO L226 Difference]: Without dead ends: 56 [2022-11-22 00:24:05,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:05,097 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:05,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:24:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-22 00:24:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-22 00:24:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 83 transitions. [2022-11-22 00:24:05,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 83 transitions. Word has length 72 [2022-11-22 00:24:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:05,109 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 83 transitions. [2022-11-22 00:24:05,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 83 transitions. [2022-11-22 00:24:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 00:24:05,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:05,111 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:05,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:05,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:24:05,315 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash -531948443, now seen corresponding path program 1 times [2022-11-22 00:24:05,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:05,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360034016] [2022-11-22 00:24:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:05,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-22 00:24:06,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360034016] [2022-11-22 00:24:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360034016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002905529] [2022-11-22 00:24:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:06,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:06,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:06,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:24:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:07,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 00:24:07,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-22 00:24:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002905529] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:07,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:07,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:24:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503289807] [2022-11-22 00:24:07,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:07,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:07,552 INFO L87 Difference]: Start difference. First operand 56 states and 83 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:08,107 INFO L93 Difference]: Finished difference Result 91 states and 138 transitions. [2022-11-22 00:24:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2022-11-22 00:24:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:08,109 INFO L225 Difference]: With dead ends: 91 [2022-11-22 00:24:08,109 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 00:24:08,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:08,110 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:08,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 00:24:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-22 00:24:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 84 transitions. [2022-11-22 00:24:08,121 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 84 transitions. Word has length 73 [2022-11-22 00:24:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:08,121 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 84 transitions. [2022-11-22 00:24:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 84 transitions. [2022-11-22 00:24:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:24:08,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:08,123 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:08,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:08,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:08,331 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1548574988, now seen corresponding path program 1 times [2022-11-22 00:24:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020544637] [2022-11-22 00:24:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-22 00:24:09,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020544637] [2022-11-22 00:24:09,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020544637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:09,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863580264] [2022-11-22 00:24:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:09,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:09,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:09,405 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:09,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:24:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:10,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 00:24:10,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-22 00:24:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863580264] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:10,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:10,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:24:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134350868] [2022-11-22 00:24:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:10,614 INFO L87 Difference]: Start difference. First operand 57 states and 84 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:11,347 INFO L93 Difference]: Finished difference Result 93 states and 140 transitions. [2022-11-22 00:24:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2022-11-22 00:24:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:11,348 INFO L225 Difference]: With dead ends: 93 [2022-11-22 00:24:11,348 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 00:24:11,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:11,349 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:11,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:24:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 00:24:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-22 00:24:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 85 transitions. [2022-11-22 00:24:11,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 85 transitions. Word has length 74 [2022-11-22 00:24:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:11,360 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 85 transitions. [2022-11-22 00:24:11,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 85 transitions. [2022-11-22 00:24:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:24:11,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:11,362 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:11,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 00:24:11,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:11,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1359662176, now seen corresponding path program 1 times [2022-11-22 00:24:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:11,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371551261] [2022-11-22 00:24:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-22 00:24:12,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371551261] [2022-11-22 00:24:12,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371551261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:12,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033969064] [2022-11-22 00:24:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:12,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:12,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:12,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:12,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:24:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:13,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 00:24:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-22 00:24:13,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033969064] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:13,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:13,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:24:13,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849843340] [2022-11-22 00:24:13,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:13,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:13,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:13,733 INFO L87 Difference]: Start difference. First operand 58 states and 85 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:14,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:14,180 INFO L93 Difference]: Finished difference Result 95 states and 142 transitions. [2022-11-22 00:24:14,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:14,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 75 [2022-11-22 00:24:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:14,182 INFO L225 Difference]: With dead ends: 95 [2022-11-22 00:24:14,182 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 00:24:14,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:14,183 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:14,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:24:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 00:24:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-22 00:24:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2022-11-22 00:24:14,193 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 75 [2022-11-22 00:24:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:14,194 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2022-11-22 00:24:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2022-11-22 00:24:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:24:14,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:14,195 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:14,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:14,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:24:14,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash -990761753, now seen corresponding path program 1 times [2022-11-22 00:24:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:14,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272321102] [2022-11-22 00:24:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-22 00:24:15,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272321102] [2022-11-22 00:24:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272321102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:15,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322824939] [2022-11-22 00:24:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:15,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:15,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:24:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2757 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 00:24:16,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-22 00:24:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322824939] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:16,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:16,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121494983] [2022-11-22 00:24:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:16,610 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:17,544 INFO L93 Difference]: Finished difference Result 97 states and 144 transitions. [2022-11-22 00:24:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:17,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 76 [2022-11-22 00:24:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:17,546 INFO L225 Difference]: With dead ends: 97 [2022-11-22 00:24:17,546 INFO L226 Difference]: Without dead ends: 60 [2022-11-22 00:24:17,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:17,547 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:17,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:24:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-22 00:24:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-22 00:24:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2022-11-22 00:24:17,558 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 76 [2022-11-22 00:24:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:17,559 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2022-11-22 00:24:17,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2022-11-22 00:24:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 00:24:17,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:17,561 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:17,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:24:17,767 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1356481381, now seen corresponding path program 1 times [2022-11-22 00:24:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640487697] [2022-11-22 00:24:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-22 00:24:18,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640487697] [2022-11-22 00:24:18,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640487697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356157052] [2022-11-22 00:24:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:18,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:18,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:24:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 00:24:19,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-22 00:24:19,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356157052] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:19,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:19,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:19,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554877588] [2022-11-22 00:24:19,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:19,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:19,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:19,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:19,989 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:20,362 INFO L93 Difference]: Finished difference Result 99 states and 146 transitions. [2022-11-22 00:24:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 77 [2022-11-22 00:24:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:20,364 INFO L225 Difference]: With dead ends: 99 [2022-11-22 00:24:20,364 INFO L226 Difference]: Without dead ends: 61 [2022-11-22 00:24:20,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:20,364 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:20,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:24:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-22 00:24:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-22 00:24:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2022-11-22 00:24:20,373 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 77 [2022-11-22 00:24:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:20,374 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2022-11-22 00:24:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2022-11-22 00:24:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 00:24:20,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:20,376 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:20,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:20,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:20,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1171963248, now seen corresponding path program 1 times [2022-11-22 00:24:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:20,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996872981] [2022-11-22 00:24:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-22 00:24:21,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996872981] [2022-11-22 00:24:21,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996872981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845238664] [2022-11-22 00:24:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:21,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:21,328 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:21,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:24:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 00:24:22,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-22 00:24:22,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845238664] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:22,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:22,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957983572] [2022-11-22 00:24:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:22,803 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:24,154 INFO L93 Difference]: Finished difference Result 101 states and 148 transitions. [2022-11-22 00:24:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2022-11-22 00:24:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:24,155 INFO L225 Difference]: With dead ends: 101 [2022-11-22 00:24:24,155 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 00:24:24,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:24,157 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:24,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:24:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 00:24:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-22 00:24:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2022-11-22 00:24:24,167 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 78 [2022-11-22 00:24:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:24,168 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2022-11-22 00:24:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2022-11-22 00:24:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 00:24:24,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:24,169 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:24,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:24,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1295399476, now seen corresponding path program 1 times [2022-11-22 00:24:24,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:24,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571372090] [2022-11-22 00:24:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:24,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-22 00:24:25,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:25,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571372090] [2022-11-22 00:24:25,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571372090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:25,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153999428] [2022-11-22 00:24:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:25,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:25,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:25,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:24:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2778 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:26,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 00:24:26,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-22 00:24:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153999428] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:26,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:26,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429561109] [2022-11-22 00:24:26,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:26,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:26,622 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:27,131 INFO L93 Difference]: Finished difference Result 103 states and 150 transitions. [2022-11-22 00:24:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2022-11-22 00:24:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:27,132 INFO L225 Difference]: With dead ends: 103 [2022-11-22 00:24:27,132 INFO L226 Difference]: Without dead ends: 63 [2022-11-22 00:24:27,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:27,133 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:27,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-22 00:24:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-22 00:24:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2022-11-22 00:24:27,143 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 79 [2022-11-22 00:24:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:27,143 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2022-11-22 00:24:27,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2022-11-22 00:24:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:24:27,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:27,145 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:27,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:24:27,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -514884718, now seen corresponding path program 1 times [2022-11-22 00:24:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021228269] [2022-11-22 00:24:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 00:24:28,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:28,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021228269] [2022-11-22 00:24:28,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021228269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:28,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596228669] [2022-11-22 00:24:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:28,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:28,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:28,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:24:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:29,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 00:24:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-22 00:24:29,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596228669] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:29,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:29,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:29,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128280855] [2022-11-22 00:24:29,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:29,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:29,679 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:30,162 INFO L93 Difference]: Finished difference Result 105 states and 152 transitions. [2022-11-22 00:24:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 80 [2022-11-22 00:24:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:30,164 INFO L225 Difference]: With dead ends: 105 [2022-11-22 00:24:30,164 INFO L226 Difference]: Without dead ends: 64 [2022-11-22 00:24:30,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:30,165 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:30,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-22 00:24:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-22 00:24:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2022-11-22 00:24:30,175 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 80 [2022-11-22 00:24:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:30,175 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2022-11-22 00:24:30,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2022-11-22 00:24:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-22 00:24:30,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:30,177 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:30,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:24:30,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2067092941, now seen corresponding path program 1 times [2022-11-22 00:24:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432114916] [2022-11-22 00:24:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-22 00:24:31,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:31,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432114916] [2022-11-22 00:24:31,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432114916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:31,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858711574] [2022-11-22 00:24:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:31,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:31,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:31,297 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:31,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:24:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:32,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-22 00:24:32,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-22 00:24:32,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858711574] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:32,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:32,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:32,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488234829] [2022-11-22 00:24:32,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:32,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:32,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:32,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:32,733 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:33,400 INFO L93 Difference]: Finished difference Result 107 states and 154 transitions. [2022-11-22 00:24:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:33,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2022-11-22 00:24:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:33,401 INFO L225 Difference]: With dead ends: 107 [2022-11-22 00:24:33,401 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 00:24:33,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:33,402 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:33,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:24:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 00:24:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-22 00:24:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2022-11-22 00:24:33,408 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 81 [2022-11-22 00:24:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:33,408 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2022-11-22 00:24:33,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2022-11-22 00:24:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 00:24:33,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:33,410 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:33,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:33,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 00:24:33,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash 897469488, now seen corresponding path program 1 times [2022-11-22 00:24:33,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:33,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825879998] [2022-11-22 00:24:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:33,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-22 00:24:34,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:34,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825879998] [2022-11-22 00:24:34,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825879998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:34,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620326776] [2022-11-22 00:24:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:34,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:34,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:34,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:24:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 00:24:35,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-22 00:24:35,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620326776] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:35,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:35,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616481847] [2022-11-22 00:24:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:35,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:35,886 INFO L87 Difference]: Start difference. First operand 65 states and 92 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:36,410 INFO L93 Difference]: Finished difference Result 109 states and 156 transitions. [2022-11-22 00:24:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 82 [2022-11-22 00:24:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:36,412 INFO L225 Difference]: With dead ends: 109 [2022-11-22 00:24:36,412 INFO L226 Difference]: Without dead ends: 66 [2022-11-22 00:24:36,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:36,413 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:36,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-22 00:24:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-22 00:24:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2022-11-22 00:24:36,423 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 82 [2022-11-22 00:24:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:36,423 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2022-11-22 00:24:36,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2022-11-22 00:24:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 00:24:36,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:36,425 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:36,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-22 00:24:36,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:24:36,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1477854705, now seen corresponding path program 1 times [2022-11-22 00:24:36,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:36,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359450545] [2022-11-22 00:24:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-22 00:24:37,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:37,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359450545] [2022-11-22 00:24:37,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359450545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:37,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411914137] [2022-11-22 00:24:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:37,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:37,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:37,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:37,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 00:24:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:38,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 00:24:38,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 00:24:38,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411914137] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:38,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:38,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-22 00:24:38,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853703008] [2022-11-22 00:24:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:38,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:38,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:38,777 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:39,339 INFO L93 Difference]: Finished difference Result 111 states and 158 transitions. [2022-11-22 00:24:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2022-11-22 00:24:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:39,341 INFO L225 Difference]: With dead ends: 111 [2022-11-22 00:24:39,341 INFO L226 Difference]: Without dead ends: 67 [2022-11-22 00:24:39,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:24:39,342 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:39,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-22 00:24:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-22 00:24:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-11-22 00:24:39,352 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 83 [2022-11-22 00:24:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:39,353 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-11-22 00:24:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-11-22 00:24:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 00:24:39,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:39,354 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:39,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:39,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 00:24:39,569 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:39,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1023712466, now seen corresponding path program 1 times [2022-11-22 00:24:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055563299] [2022-11-22 00:24:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:39,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-22 00:24:40,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:40,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055563299] [2022-11-22 00:24:40,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055563299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:40,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710220786] [2022-11-22 00:24:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:40,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:40,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:40,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 00:24:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2813 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-22 00:24:41,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-22 00:24:41,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710220786] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:41,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:41,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005861984] [2022-11-22 00:24:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:41,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:41,826 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:42,664 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2022-11-22 00:24:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2022-11-22 00:24:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:42,666 INFO L225 Difference]: With dead ends: 113 [2022-11-22 00:24:42,666 INFO L226 Difference]: Without dead ends: 68 [2022-11-22 00:24:42,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:42,667 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:42,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 00:24:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-22 00:24:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-22 00:24:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2022-11-22 00:24:42,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 84 [2022-11-22 00:24:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:42,678 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2022-11-22 00:24:42,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2022-11-22 00:24:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 00:24:42,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:42,679 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:42,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:42,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:42,894 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2005884612, now seen corresponding path program 1 times [2022-11-22 00:24:42,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:42,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735404867] [2022-11-22 00:24:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:42,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-22 00:24:43,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:43,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735404867] [2022-11-22 00:24:43,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735404867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:43,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841903258] [2022-11-22 00:24:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:43,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:43,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:43,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:43,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 00:24:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:24:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-22 00:24:45,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-22 00:24:45,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841903258] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:45,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:24:45,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-22 00:24:45,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457411309] [2022-11-22 00:24:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:24:45,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:24:45,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:24:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:45,112 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:45,614 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2022-11-22 00:24:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:24:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2022-11-22 00:24:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:45,616 INFO L225 Difference]: With dead ends: 115 [2022-11-22 00:24:45,616 INFO L226 Difference]: Without dead ends: 69 [2022-11-22 00:24:45,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:24:45,617 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-22 00:24:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-22 00:24:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 00:24:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2022-11-22 00:24:45,626 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 85 [2022-11-22 00:24:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:45,626 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2022-11-22 00:24:45,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 00:24:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2022-11-22 00:24:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 00:24:45,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:45,628 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:45,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:45,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:45,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -174363678, now seen corresponding path program 1 times [2022-11-22 00:24:45,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:45,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870926061] [2022-11-22 00:24:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:45,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-22 00:24:46,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870926061] [2022-11-22 00:24:46,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870926061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576262107] [2022-11-22 00:24:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:46,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:46,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:46,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:46,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e821bf68-e936-4ceb-9012-f49bec4665dd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 00:24:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:24:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-22 00:24:48,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-22 00:24:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576262107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:24:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266469790] [2022-11-22 00:24:48,112 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-22 00:24:48,112 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:24:48,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:24:48,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:24:48,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:24:48,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:24:48,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-22 00:24:48,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-22 00:24:48,947 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-22 00:24:48,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 652 treesize of output 659 [2022-11-22 00:24:49,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:24:49,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:24:49,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:24:50,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-22 00:24:50,642 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-22 00:24:50,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 499 [2022-11-22 00:24:51,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:24:51,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:24:51,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:24:51,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:24:52,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:52,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 96 [2022-11-22 00:24:52,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:24:59,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:24:59,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:25:00,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:00,489 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:25:00,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:25:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:01,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:01,931 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-22 00:25:01,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 74 [2022-11-22 00:25:02,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:02,780 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:25:02,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:25:03,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:25:03,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:25:03,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:25:04,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:04,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:04,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:04,360 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-22 00:25:04,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 67 [2022-11-22 00:25:06,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:06,826 INFO L321 Elim1Store]: treesize reduction 82, result has 58.6 percent of original size [2022-11-22 00:25:06,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 334 [2022-11-22 00:25:09,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:09,675 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:25:09,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:25:10,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:25:10,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:25:10,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:25:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:11,354 INFO L321 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2022-11-22 00:25:11,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 43 [2022-11-22 00:25:13,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:13,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:25:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:14,213 INFO L321 Elim1Store]: treesize reduction 256, result has 29.3 percent of original size [2022-11-22 00:25:14,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 466 treesize of output 517 [2022-11-22 00:25:17,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:17,877 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:25:17,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:25:18,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:25:18,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:25:18,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:25:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:19,986 INFO L321 Elim1Store]: treesize reduction 152, result has 43.5 percent of original size [2022-11-22 00:25:19,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 133 [2022-11-22 00:25:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:25:23,592 INFO L321 Elim1Store]: treesize reduction 112, result has 67.0 percent of original size [2022-11-22 00:25:23,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 460 [2022-11-22 00:26:06,347 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7492 conjuctions. This might take some time... [2022-11-22 00:29:53,193 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 7492 conjuctions. [2022-11-22 00:30:01,032 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7492 conjuctions. This might take some time... [2022-11-22 00:34:05,303 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 7492 conjuctions. [2022-11-22 00:34:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:17,703 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:34:17,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:34:18,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:34:18,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:34:19,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:34:20,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:20,254 INFO L321 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2022-11-22 00:34:20,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-11-22 00:34:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:23,659 INFO L321 Elim1Store]: treesize reduction 82, result has 62.4 percent of original size [2022-11-22 00:34:23,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 354 [2022-11-22 00:34:30,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:30,201 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:34:30,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:34:31,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:34:31,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:34:31,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:34:32,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:32,639 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:34:32,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:34:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:36,291 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-22 00:34:36,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 74 [2022-11-22 00:34:38,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:38,093 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:34:38,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:34:40,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:34:40,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:34:41,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:34:43,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:43,336 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:34:43,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:34:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:48,425 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-22 00:34:48,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 74 [2022-11-22 00:34:50,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:50,978 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:34:50,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:34:52,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:34:52,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:34:52,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:34:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:54,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:54,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:54,661 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-22 00:34:54,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 67 [2022-11-22 00:35:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,015 INFO L321 Elim1Store]: treesize reduction 82, result has 58.6 percent of original size [2022-11-22 00:35:01,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 334 [2022-11-22 00:35:06,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:06,217 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:06,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:35:07,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:35:08,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:35:08,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:35:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:10,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:10,279 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:10,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2022-11-22 00:35:16,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,921 INFO L321 Elim1Store]: treesize reduction 218, result has 25.9 percent of original size [2022-11-22 00:35:16,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 485 treesize of output 520 [2022-11-22 00:35:21,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:21,239 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:21,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:35:22,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:35:23,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:35:23,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:35:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:25,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:25,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:25,205 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:25,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2022-11-22 00:35:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:32,748 INFO L321 Elim1Store]: treesize reduction 214, result has 14.4 percent of original size [2022-11-22 00:35:32,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 491 treesize of output 486 [2022-11-22 00:35:36,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:36,093 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:36,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:35:38,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:35:38,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:35:38,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:35:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:44,774 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:44,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:35:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:50,942 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:35:50,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:35:53,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:35:53,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:35:54,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:35:56,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:56,688 INFO L321 Elim1Store]: treesize reduction 138, result has 35.5 percent of original size [2022-11-22 00:35:56,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 95 [2022-11-22 00:36:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:05,181 INFO L321 Elim1Store]: treesize reduction 82, result has 62.4 percent of original size [2022-11-22 00:36:05,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 354 [2022-11-22 00:36:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:16,037 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:36:16,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:36:18,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 00:36:21,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:21,292 INFO L321 Elim1Store]: treesize reduction 52, result has 55.6 percent of original size [2022-11-22 00:36:21,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 81 [2022-11-22 00:36:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:25,082 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:36:25,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:36:28,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:28,401 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:36:28,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 00:36:36,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:36,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:36,482 INFO L321 Elim1Store]: treesize reduction 94, result has 36.5 percent of original size [2022-11-22 00:36:36,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 89 [2022-11-22 00:36:40,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:40,225 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:36:40,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:36:43,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:44,051 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:36:44,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:36:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:52,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:52,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:52,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:52,319 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-22 00:36:52,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 142 [2022-11-22 00:36:56,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:56,514 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:36:56,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 00:36:59,299 INFO L321 Elim1Store]: treesize reduction 1529, result has 3.5 percent of original size [2022-11-22 00:36:59,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 11 case distinctions, treesize of input 39 treesize of output 61