./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f86f2fbff11a0ee7c52360384354edd19538e6bc949aea04301001498242d90 --- 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-2329fc7 [2022-12-14 12:55:19,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:55:19,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:55:19,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:55:19,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:55:19,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:55:19,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:55:19,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:55:19,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:55:19,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:55:19,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:55:19,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:55:19,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:55:19,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:55:19,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:55:19,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:55:19,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:55:19,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:55:19,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:55:19,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:55:19,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:55:19,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:55:19,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:55:19,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:55:19,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:55:19,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:55:19,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:55:19,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:55:19,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:55:19,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:55:19,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:55:19,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:55:19,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:55:19,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:55:19,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:55:19,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:55:19,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:55:19,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:55:19,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:55:19,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:55:19,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:55:19,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:55:19,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:55:19,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:55:19,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:55:19,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:55:19,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:55:19,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:55:19,562 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:55:19,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:55:19,562 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:55:19,562 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:55:19,563 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:55:19,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:55:19,563 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:55:19,563 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:55:19,563 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:55:19,564 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:55:19,564 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:55:19,564 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:55:19,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:55:19,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:55:19,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:55:19,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:55:19,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:55:19,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:55:19,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:55:19,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:55:19,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:55:19,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:55:19,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:55:19,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:55:19,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:55:19,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:55:19,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:55:19,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:55:19,568 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:55:19,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:55:19,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:55:19,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:55:19,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:55:19,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:55:19,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:55:19,569 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_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f86f2fbff11a0ee7c52360384354edd19538e6bc949aea04301001498242d90 [2022-12-14 12:55:19,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:55:19,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:55:19,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:55:19,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:55:19,812 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:55:19,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c [2022-12-14 12:55:22,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:55:23,077 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:55:23,077 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c [2022-12-14 12:55:23,111 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/data/117f658b6/9f1c3d02f8744f1fb69428535425604b/FLAGb3ccc5f97 [2022-12-14 12:55:23,121 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/data/117f658b6/9f1c3d02f8744f1fb69428535425604b [2022-12-14 12:55:23,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:55:23,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:55:23,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:55:23,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:55:23,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:55:23,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:55:23" (1/1) ... [2022-12-14 12:55:23,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1578dbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:23, skipping insertion in model container [2022-12-14 12:55:23,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:55:23" (1/1) ... [2022-12-14 12:55:23,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:55:23,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:55:24,680 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_1409cfa6-df23-4669-b033-44e7399a3c51/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c[382357,382370] [2022-12-14 12:55:24,702 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_1409cfa6-df23-4669-b033-44e7399a3c51/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c[383339,383352] [2022-12-14 12:55:24,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:55:24,961 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:55:25,739 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_1409cfa6-df23-4669-b033-44e7399a3c51/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c[382357,382370] [2022-12-14 12:55:25,741 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_1409cfa6-df23-4669-b033-44e7399a3c51/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-1.c[383339,383352] [2022-12-14 12:55:25,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:55:25,790 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:55:25,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25 WrapperNode [2022-12-14 12:55:25,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:55:25,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:55:25,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:55:25,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:55:25,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:25,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,102 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13204 [2022-12-14 12:55:26,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:55:26,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:55:26,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:55:26,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:55:26,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,302 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:55:26,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:55:26,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:55:26,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:55:26,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (1/1) ... [2022-12-14 12:55:26,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:55:26,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:26,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:55:26,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:55:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:55:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 12:55:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 12:55:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:55:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:55:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 12:55:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 12:55:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 12:55:26,411 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 12:55:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 12:55:26,411 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 12:55:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 12:55:26,411 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 12:55:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 12:55:26,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 12:55:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:55:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:55:26,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:55:26,526 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:55:26,527 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:55:32,223 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:55:33,740 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:55:33,741 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-14 12:55:33,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:55:33 BoogieIcfgContainer [2022-12-14 12:55:33,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:55:33,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:55:33,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:55:33,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:55:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:55:23" (1/3) ... [2022-12-14 12:55:33,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f750cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:55:33, skipping insertion in model container [2022-12-14 12:55:33,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:25" (2/3) ... [2022-12-14 12:55:33,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f750cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:55:33, skipping insertion in model container [2022-12-14 12:55:33,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:55:33" (3/3) ... [2022-12-14 12:55:33,752 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.12.cil-1.c [2022-12-14 12:55:33,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:55:33,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:55:33,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:55:33,845 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;@33ddcd40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:55:33,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:55:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-14 12:55:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 12:55:33,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:33,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:33,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1899096572, now seen corresponding path program 1 times [2022-12-14 12:55:33,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:33,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441311837] [2022-12-14 12:55:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:33,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:55:34,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441311837] [2022-12-14 12:55:34,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441311837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:34,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:55:34,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:55:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156513864] [2022-12-14 12:55:34,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:34,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:55:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:55:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:55:34,333 INFO L87 Difference]: Start difference. First operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:55:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:35,133 INFO L93 Difference]: Finished difference Result 3844 states and 7447 transitions. [2022-12-14 12:55:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:55:35,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-12-14 12:55:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:35,152 INFO L225 Difference]: With dead ends: 3844 [2022-12-14 12:55:35,152 INFO L226 Difference]: Without dead ends: 2006 [2022-12-14 12:55:35,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:55:35,160 INFO L413 NwaCegarLoop]: 3518 mSDtfsCounter, 3787 mSDsluCounter, 3418 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3787 SdHoareTripleChecker+Valid, 6936 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:35,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3787 Valid, 6936 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:55:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-12-14 12:55:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 2005. [2022-12-14 12:55:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 1941 states have (on average 1.919629057187017) internal successors, (3726), 1945 states have internal predecessors, (3726), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 12:55:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3824 transitions. [2022-12-14 12:55:35,251 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3824 transitions. Word has length 68 [2022-12-14 12:55:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:35,251 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 3824 transitions. [2022-12-14 12:55:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:55:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3824 transitions. [2022-12-14 12:55:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:35,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:35,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:35,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:55:35,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash -355644257, now seen corresponding path program 1 times [2022-12-14 12:55:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:35,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290461702] [2022-12-14 12:55:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:35,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:35,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290461702] [2022-12-14 12:55:35,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290461702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058953347] [2022-12-14 12:55:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:35,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:35,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:55:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:55:35,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:35,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058953347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:35,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:35,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004017191] [2022-12-14 12:55:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:35,698 INFO L87 Difference]: Start difference. First operand 2005 states and 3824 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:36,103 INFO L93 Difference]: Finished difference Result 2716 states and 4939 transitions. [2022-12-14 12:55:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:36,113 INFO L225 Difference]: With dead ends: 2716 [2022-12-14 12:55:36,113 INFO L226 Difference]: Without dead ends: 2357 [2022-12-14 12:55:36,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:36,116 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3515 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3589 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:36,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3589 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-12-14 12:55:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2351. [2022-12-14 12:55:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2233 states have (on average 1.8669950738916257) internal successors, (4169), 2238 states have internal predecessors, (4169), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-14 12:55:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 4351 transitions. [2022-12-14 12:55:36,173 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 4351 transitions. Word has length 137 [2022-12-14 12:55:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:36,173 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 4351 transitions. [2022-12-14 12:55:36,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 4351 transitions. [2022-12-14 12:55:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:36,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:36,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:36,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:36,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 12:55:36,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash -326758017, now seen corresponding path program 1 times [2022-12-14 12:55:36,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:36,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083425182] [2022-12-14 12:55:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:36,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:36,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083425182] [2022-12-14 12:55:36,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083425182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745925282] [2022-12-14 12:55:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:36,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:36,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:36,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:55:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:36,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:55:36,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745925282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:36,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:36,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948723120] [2022-12-14 12:55:36,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:36,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:36,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:36,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:36,719 INFO L87 Difference]: Start difference. First operand 2351 states and 4351 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:37,110 INFO L93 Difference]: Finished difference Result 3748 states and 6538 transitions. [2022-12-14 12:55:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:37,120 INFO L225 Difference]: With dead ends: 3748 [2022-12-14 12:55:37,120 INFO L226 Difference]: Without dead ends: 3043 [2022-12-14 12:55:37,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:37,124 INFO L413 NwaCegarLoop]: 3345 mSDtfsCounter, 3527 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:37,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3577 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2022-12-14 12:55:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 3035. [2022-12-14 12:55:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2811 states have (on average 1.7940234791889007) internal successors, (5043), 2818 states have internal predecessors, (5043), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-12-14 12:55:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 5389 transitions. [2022-12-14 12:55:37,231 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 5389 transitions. Word has length 137 [2022-12-14 12:55:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:37,231 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 5389 transitions. [2022-12-14 12:55:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 5389 transitions. [2022-12-14 12:55:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:37,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:37,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:37,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:55:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:37,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 501122655, now seen corresponding path program 1 times [2022-12-14 12:55:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:37,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495929316] [2022-12-14 12:55:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:37,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495929316] [2022-12-14 12:55:37,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495929316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639968152] [2022-12-14 12:55:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:37,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:37,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:37,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:55:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:55:37,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:37,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639968152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:37,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:37,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358393389] [2022-12-14 12:55:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:37,730 INFO L87 Difference]: Start difference. First operand 3035 states and 5389 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:38,182 INFO L93 Difference]: Finished difference Result 5788 states and 9686 transitions. [2022-12-14 12:55:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:38,199 INFO L225 Difference]: With dead ends: 5788 [2022-12-14 12:55:38,200 INFO L226 Difference]: Without dead ends: 4399 [2022-12-14 12:55:38,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:38,205 INFO L413 NwaCegarLoop]: 3344 mSDtfsCounter, 3533 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:38,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3576 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2022-12-14 12:55:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 4387. [2022-12-14 12:55:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 3955 states have (on average 1.710998735777497) internal successors, (6767), 3966 states have internal predecessors, (6767), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-12-14 12:55:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 7433 transitions. [2022-12-14 12:55:38,317 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 7433 transitions. Word has length 137 [2022-12-14 12:55:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:38,317 INFO L495 AbstractCegarLoop]: Abstraction has 4387 states and 7433 transitions. [2022-12-14 12:55:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 7433 transitions. [2022-12-14 12:55:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:38,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:38,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:38,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:55:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:38,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1987849409, now seen corresponding path program 1 times [2022-12-14 12:55:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:38,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992717493] [2022-12-14 12:55:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:38,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992717493] [2022-12-14 12:55:38,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992717493] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837971579] [2022-12-14 12:55:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:38,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:38,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:55:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 12:55:38,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:38,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837971579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:38,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:38,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:38,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399678818] [2022-12-14 12:55:38,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:38,851 INFO L87 Difference]: Start difference. First operand 4387 states and 7433 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:39,253 INFO L93 Difference]: Finished difference Result 9820 states and 15882 transitions. [2022-12-14 12:55:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:39,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:39,304 INFO L225 Difference]: With dead ends: 9820 [2022-12-14 12:55:39,304 INFO L226 Difference]: Without dead ends: 7079 [2022-12-14 12:55:39,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:39,311 INFO L413 NwaCegarLoop]: 3354 mSDtfsCounter, 3536 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3536 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:39,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3536 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2022-12-14 12:55:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7059. [2022-12-14 12:55:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 6219 states have (on average 1.6348287506029908) internal successors, (10167), 6238 states have internal predecessors, (10167), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-12-14 12:55:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 11457 transitions. [2022-12-14 12:55:39,468 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 11457 transitions. Word has length 137 [2022-12-14 12:55:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:39,468 INFO L495 AbstractCegarLoop]: Abstraction has 7059 states and 11457 transitions. [2022-12-14 12:55:39,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 11457 transitions. [2022-12-14 12:55:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:39,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:39,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:39,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:39,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:39,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:39,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1655757407, now seen corresponding path program 1 times [2022-12-14 12:55:39,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:39,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208921916] [2022-12-14 12:55:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:39,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:39,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208921916] [2022-12-14 12:55:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208921916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150918420] [2022-12-14 12:55:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:39,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:39,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:55:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:40,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:55:40,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:40,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150918420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:40,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:40,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:40,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076649548] [2022-12-14 12:55:40,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:40,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:40,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:40,105 INFO L87 Difference]: Start difference. First operand 7059 states and 11457 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:40,650 INFO L93 Difference]: Finished difference Result 17788 states and 28074 transitions. [2022-12-14 12:55:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:40,686 INFO L225 Difference]: With dead ends: 17788 [2022-12-14 12:55:40,686 INFO L226 Difference]: Without dead ends: 12375 [2022-12-14 12:55:40,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:40,699 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3506 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:40,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3506 Valid, 3549 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12375 states. [2022-12-14 12:55:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12375 to 12339. [2022-12-14 12:55:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12339 states, 10699 states have (on average 1.5768763435835125) internal successors, (16871), 10734 states have internal predecessors, (16871), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-12-14 12:55:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12339 states to 12339 states and 19377 transitions. [2022-12-14 12:55:41,141 INFO L78 Accepts]: Start accepts. Automaton has 12339 states and 19377 transitions. Word has length 137 [2022-12-14 12:55:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:41,141 INFO L495 AbstractCegarLoop]: Abstraction has 12339 states and 19377 transitions. [2022-12-14 12:55:41,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12339 states and 19377 transitions. [2022-12-14 12:55:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:41,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:41,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:41,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:55:41,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:41,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 41752959, now seen corresponding path program 1 times [2022-12-14 12:55:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:41,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519288807] [2022-12-14 12:55:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:41,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519288807] [2022-12-14 12:55:41,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519288807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809303943] [2022-12-14 12:55:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:41,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:41,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:41,552 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:41,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:55:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:55:41,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:41,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809303943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:41,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:41,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69389917] [2022-12-14 12:55:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:41,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:41,745 INFO L87 Difference]: Start difference. First operand 12339 states and 19377 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:42,455 INFO L93 Difference]: Finished difference Result 33532 states and 52058 transitions. [2022-12-14 12:55:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:42,530 INFO L225 Difference]: With dead ends: 33532 [2022-12-14 12:55:42,530 INFO L226 Difference]: Without dead ends: 22839 [2022-12-14 12:55:42,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:42,562 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3509 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:42,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3549 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22839 states. [2022-12-14 12:55:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22839 to 22771. [2022-12-14 12:55:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22771 states, 19563 states have (on average 1.537954301487502) internal successors, (30087), 19630 states have internal predecessors, (30087), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-12-14 12:55:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22771 states to 22771 states and 34961 transitions. [2022-12-14 12:55:43,117 INFO L78 Accepts]: Start accepts. Automaton has 22771 states and 34961 transitions. Word has length 137 [2022-12-14 12:55:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:43,118 INFO L495 AbstractCegarLoop]: Abstraction has 22771 states and 34961 transitions. [2022-12-14 12:55:43,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 22771 states and 34961 transitions. [2022-12-14 12:55:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:43,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:43,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:43,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:55:43,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 12:55:43,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:43,337 INFO L85 PathProgramCache]: Analyzing trace with hash -605878689, now seen corresponding path program 1 times [2022-12-14 12:55:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:43,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788641124] [2022-12-14 12:55:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:43,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788641124] [2022-12-14 12:55:43,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788641124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855715553] [2022-12-14 12:55:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:43,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:43,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:43,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:43,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:55:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:55:43,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:43,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855715553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:43,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:43,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:55:43,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142705833] [2022-12-14 12:55:43,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:43,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:43,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:43,650 INFO L87 Difference]: Start difference. First operand 22771 states and 34961 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:44,812 INFO L93 Difference]: Finished difference Result 64636 states and 99226 transitions. [2022-12-14 12:55:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 12:55:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:44,931 INFO L225 Difference]: With dead ends: 64636 [2022-12-14 12:55:44,931 INFO L226 Difference]: Without dead ends: 43511 [2022-12-14 12:55:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:44,980 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3521 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:44,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3549 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43511 states. [2022-12-14 12:55:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43511 to 43379. [2022-12-14 12:55:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43379 states, 37099 states have (on average 1.5131135610124262) internal successors, (56135), 37230 states have internal predecessors, (56135), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-12-14 12:55:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43379 states to 43379 states and 65617 transitions. [2022-12-14 12:55:46,072 INFO L78 Accepts]: Start accepts. Automaton has 43379 states and 65617 transitions. Word has length 137 [2022-12-14 12:55:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:46,073 INFO L495 AbstractCegarLoop]: Abstraction has 43379 states and 65617 transitions. [2022-12-14 12:55:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:55:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 43379 states and 65617 transitions. [2022-12-14 12:55:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:55:46,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:46,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:46,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:55:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:46,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1114415935, now seen corresponding path program 1 times [2022-12-14 12:55:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:46,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381777942] [2022-12-14 12:55:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 12:55:46,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381777942] [2022-12-14 12:55:46,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381777942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:46,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:55:46,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:55:46,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332079624] [2022-12-14 12:55:46,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:46,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:55:46,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:55:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:55:46,698 INFO L87 Difference]: Start difference. First operand 43379 states and 65617 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:55:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:49,922 INFO L93 Difference]: Finished difference Result 147579 states and 220888 transitions. [2022-12-14 12:55:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:55:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-12-14 12:55:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:50,360 INFO L225 Difference]: With dead ends: 147579 [2022-12-14 12:55:50,361 INFO L226 Difference]: Without dead ends: 105847 [2022-12-14 12:55:50,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:55:50,424 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 4353 mSDsluCounter, 9768 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 13084 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:50,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4374 Valid, 13084 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:55:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105847 states. [2022-12-14 12:55:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105847 to 83571. [2022-12-14 12:55:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83571 states, 71275 states have (on average 1.4969484391441599) internal successors, (106695), 71534 states have internal predecessors, (106695), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-12-14 12:55:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83571 states to 83571 states and 125137 transitions. [2022-12-14 12:55:53,631 INFO L78 Accepts]: Start accepts. Automaton has 83571 states and 125137 transitions. Word has length 137 [2022-12-14 12:55:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:53,632 INFO L495 AbstractCegarLoop]: Abstraction has 83571 states and 125137 transitions. [2022-12-14 12:55:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:55:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83571 states and 125137 transitions. [2022-12-14 12:55:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 12:55:53,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:53,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:53,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:55:53,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1920601803, now seen corresponding path program 1 times [2022-12-14 12:55:53,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954851951] [2022-12-14 12:55:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:53,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:55:53,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954851951] [2022-12-14 12:55:53,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954851951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434030384] [2022-12-14 12:55:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:53,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:53,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:53,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:53,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:55:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 12:55:54,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:54,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434030384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:54,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:54,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:55:54,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38233587] [2022-12-14 12:55:54,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:54,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:54,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:55:54,076 INFO L87 Difference]: Start difference. First operand 83571 states and 125137 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:55:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:57,171 INFO L93 Difference]: Finished difference Result 147191 states and 223572 transitions. [2022-12-14 12:55:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 159 [2022-12-14 12:55:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:57,500 INFO L225 Difference]: With dead ends: 147191 [2022-12-14 12:55:57,500 INFO L226 Difference]: Without dead ends: 105203 [2022-12-14 12:55:57,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:55:57,583 INFO L413 NwaCegarLoop]: 3427 mSDtfsCounter, 125 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6736 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:57,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6736 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:55:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105203 states. [2022-12-14 12:56:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105203 to 99315. [2022-12-14 12:56:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99315 states, 86507 states have (on average 1.5381761013559596) internal successors, (133063), 86766 states have internal predecessors, (133063), 9478 states have call successors, (9478), 3329 states have call predecessors, (9478), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2022-12-14 12:56:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99315 states to 99315 states and 152017 transitions. [2022-12-14 12:56:01,340 INFO L78 Accepts]: Start accepts. Automaton has 99315 states and 152017 transitions. Word has length 159 [2022-12-14 12:56:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:01,341 INFO L495 AbstractCegarLoop]: Abstraction has 99315 states and 152017 transitions. [2022-12-14 12:56:01,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:56:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 99315 states and 152017 transitions. [2022-12-14 12:56:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 12:56:01,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:01,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:56:01,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 12:56:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:01,682 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2109008673, now seen corresponding path program 1 times [2022-12-14 12:56:01,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:01,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222052165] [2022-12-14 12:56:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:01,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 12:56:01,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:56:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222052165] [2022-12-14 12:56:01,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222052165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:56:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386577832] [2022-12-14 12:56:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:01,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:01,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:56:01,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:56:01,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:56:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:56:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:56:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 12:56:02,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:56:02,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386577832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:56:02,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:56:02,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 12:56:02,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125508208] [2022-12-14 12:56:02,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:56:02,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:56:02,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:56:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:56:02,227 INFO L87 Difference]: Start difference. First operand 99315 states and 152017 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:56:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:56:08,352 INFO L93 Difference]: Finished difference Result 293116 states and 452570 transitions. [2022-12-14 12:56:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:56:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 209 [2022-12-14 12:56:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:56:08,878 INFO L225 Difference]: With dead ends: 293116 [2022-12-14 12:56:08,878 INFO L226 Difference]: Without dead ends: 195447 [2022-12-14 12:56:09,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:56:09,063 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3461 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:56:09,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3549 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:56:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195447 states. [2022-12-14 12:56:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195447 to 194675. [2022-12-14 12:56:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194675 states, 169579 states have (on average 1.5289098296369243) internal successors, (259271), 170094 states have internal predecessors, (259271), 18438 states have call successors, (18438), 6657 states have call predecessors, (18438), 6656 states have return successors, (18436), 17924 states have call predecessors, (18436), 18436 states have call successors, (18436) [2022-12-14 12:56:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194675 states to 194675 states and 296145 transitions. [2022-12-14 12:56:15,463 INFO L78 Accepts]: Start accepts. Automaton has 194675 states and 296145 transitions. Word has length 209 [2022-12-14 12:56:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:15,463 INFO L495 AbstractCegarLoop]: Abstraction has 194675 states and 296145 transitions. [2022-12-14 12:56:15,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:56:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 194675 states and 296145 transitions. [2022-12-14 12:56:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 12:56:15,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:15,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:56:15,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 12:56:15,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:15,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2049134284, now seen corresponding path program 1 times [2022-12-14 12:56:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99674689] [2022-12-14 12:56:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 12:56:16,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:56:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99674689] [2022-12-14 12:56:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99674689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:56:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481446588] [2022-12-14 12:56:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:56:16,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:56:16,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:56:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:56:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:56:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 12:56:16,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:56:16,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481446588] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:56:16,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:56:16,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 12:56:16,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094731813] [2022-12-14 12:56:16,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:56:16,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:56:16,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:56:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:56:16,551 INFO L87 Difference]: Start difference. First operand 194675 states and 296145 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:56:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:56:27,842 INFO L93 Difference]: Finished difference Result 577660 states and 887514 transitions. [2022-12-14 12:56:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:56:27,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 209 [2022-12-14 12:56:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:56:29,090 INFO L225 Difference]: With dead ends: 577660 [2022-12-14 12:56:29,091 INFO L226 Difference]: Without dead ends: 384631 [2022-12-14 12:56:29,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:56:29,483 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3461 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:56:29,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3549 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:56:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384631 states. [2022-12-14 12:56:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384631 to 383091. [2022-12-14 12:56:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383091 states, 333931 states have (on average 1.5215808056155313) internal successors, (508103), 334958 states have internal predecessors, (508103), 35846 states have call successors, (35846), 13313 states have call predecessors, (35846), 13312 states have return successors, (35844), 34820 states have call predecessors, (35844), 35844 states have call successors, (35844) [2022-12-14 12:56:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383091 states to 383091 states and 579793 transitions. [2022-12-14 12:56:43,704 INFO L78 Accepts]: Start accepts. Automaton has 383091 states and 579793 transitions. Word has length 209 [2022-12-14 12:56:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:43,704 INFO L495 AbstractCegarLoop]: Abstraction has 383091 states and 579793 transitions. [2022-12-14 12:56:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:56:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 383091 states and 579793 transitions. [2022-12-14 12:56:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 12:56:44,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:44,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:56:44,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 12:56:44,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:56:44,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash 942924602, now seen corresponding path program 1 times [2022-12-14 12:56:44,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:44,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491348214] [2022-12-14 12:56:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 12:56:44,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:56:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491348214] [2022-12-14 12:56:44,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491348214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:56:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581837678] [2022-12-14 12:56:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:44,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:56:44,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:56:44,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:56:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:56:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:56:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:56:45,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:56:45,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581837678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:56:45,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:56:45,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 12:56:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663722185] [2022-12-14 12:56:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:56:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:56:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:56:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:56:45,105 INFO L87 Difference]: Start difference. First operand 383091 states and 579793 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:57:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:08,739 INFO L93 Difference]: Finished difference Result 1139836 states and 1743066 transitions. [2022-12-14 12:57:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:57:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 209 [2022-12-14 12:57:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:11,411 INFO L225 Difference]: With dead ends: 1139836 [2022-12-14 12:57:11,411 INFO L226 Difference]: Without dead ends: 758391 [2022-12-14 12:57:12,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:12,391 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3461 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:12,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3557 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:57:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758391 states. [2022-12-14 12:57:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758391 to 755315. [2022-12-14 12:57:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755315 states, 659051 states have (on average 1.5152074725628213) internal successors, (998599), 661102 states have internal predecessors, (998599), 69638 states have call successors, (69638), 26625 states have call predecessors, (69638), 26624 states have return successors, (69636), 67588 states have call predecessors, (69636), 69636 states have call successors, (69636) [2022-12-14 12:57:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755315 states to 755315 states and 1137873 transitions. [2022-12-14 12:57:41,098 INFO L78 Accepts]: Start accepts. Automaton has 755315 states and 1137873 transitions. Word has length 209 [2022-12-14 12:57:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:41,099 INFO L495 AbstractCegarLoop]: Abstraction has 755315 states and 1137873 transitions. [2022-12-14 12:57:41,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:57:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 755315 states and 1137873 transitions. [2022-12-14 12:57:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 12:57:42,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:42,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:42,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:57:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:57:43,134 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 355738915, now seen corresponding path program 1 times [2022-12-14 12:57:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952082158] [2022-12-14 12:57:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 12:57:43,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952082158] [2022-12-14 12:57:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952082158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432178357] [2022-12-14 12:57:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:43,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:43,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1409cfa6-df23-4669-b033-44e7399a3c51/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:57:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:57:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 12:57:43,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432178357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:43,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:57:43,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 12:57:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086790460] [2022-12-14 12:57:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:57:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:57:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:43,674 INFO L87 Difference]: Start difference. First operand 755315 states and 1137873 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:58:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:31,586 INFO L93 Difference]: Finished difference Result 2250364 states and 3425498 transitions. [2022-12-14 12:58:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:58:31,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 209 [2022-12-14 12:58:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:36,916 INFO L225 Difference]: With dead ends: 2250364 [2022-12-14 12:58:36,916 INFO L226 Difference]: Without dead ends: 1496695 [2022-12-14 12:58:39,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:58:39,168 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3461 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:39,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3549 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:58:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496695 states. [2022-12-14 12:59:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496695 to 1490547. [2022-12-14 12:59:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490547 states, 1302123 states have (on average 1.509269861602936) internal successors, (1965255), 1306222 states have internal predecessors, (1965255), 135174 states have call successors, (135174), 53249 states have call predecessors, (135174), 53248 states have return successors, (135172), 131076 states have call predecessors, (135172), 135172 states have call successors, (135172)