./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW --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 24feb2eb47843fcae857e84ddd5aa58dae94843db909f56f0ca240268764bef9 --- 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-4e7fbc6 [2022-11-23 13:47:50,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:47:50,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:47:50,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:47:50,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:47:50,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:47:50,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:47:50,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:47:50,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:47:50,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:47:50,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:47:50,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:47:50,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:47:50,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:47:50,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:47:50,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:47:50,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:47:50,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:47:50,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:47:50,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:47:50,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:47:50,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:47:50,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:47:50,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:47:50,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:47:50,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:47:50,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:47:50,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:47:50,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:47:50,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:47:50,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:47:50,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:47:50,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:47:50,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:47:50,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:47:50,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:47:50,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:47:50,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:47:50,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:47:50,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:47:50,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:47:50,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:47:50,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:47:50,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:47:50,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:47:50,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:47:50,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:47:50,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:47:50,592 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:47:50,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:47:50,592 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:47:50,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:47:50,593 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:47:50,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:47:50,594 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:47:50,594 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:47:50,594 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:47:50,595 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:47:50,595 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:47:50,595 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:47:50,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:47:50,597 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:47:50,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:47:50,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:47:50,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:47:50,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:47:50,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:47:50,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:47:50,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:47:50,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:47:50,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:47:50,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:47:50,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:47:50,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:47:50,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:47:50,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:47:50,601 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:47:50,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:47:50,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:47:50,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:47:50,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:47:50,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:47:50,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:47:50,602 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_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24feb2eb47843fcae857e84ddd5aa58dae94843db909f56f0ca240268764bef9 [2022-11-23 13:47:50,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:47:50,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:47:50,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:47:50,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:47:50,910 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:47:50,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c [2022-11-23 13:47:53,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:47:54,794 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:47:54,795 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c [2022-11-23 13:47:54,846 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/data/8160dd83c/6557dd695b1e4e50acbd5c1f0ffcca0c/FLAGa0801a57f [2022-11-23 13:47:54,863 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/data/8160dd83c/6557dd695b1e4e50acbd5c1f0ffcca0c [2022-11-23 13:47:54,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:47:54,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:47:54,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:54,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:47:54,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:47:54,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:54" (1/1) ... [2022-11-23 13:47:54,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22eb5386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:54, skipping insertion in model container [2022-11-23 13:47:54,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:54" (1/1) ... [2022-11-23 13:47:54,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:47:55,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:47:57,598 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_7ea3e13e-1ae7-435a-bd77-711dc66fc692/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c[382357,382370] [2022-11-23 13:47:57,625 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_7ea3e13e-1ae7-435a-bd77-711dc66fc692/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c[383339,383352] [2022-11-23 13:47:57,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:57,931 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:47:59,144 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_7ea3e13e-1ae7-435a-bd77-711dc66fc692/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c[382357,382370] [2022-11-23 13:47:59,148 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_7ea3e13e-1ae7-435a-bd77-711dc66fc692/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-2.c[383339,383352] [2022-11-23 13:47:59,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:59,227 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:47:59,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59 WrapperNode [2022-11-23 13:47:59,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:59,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:47:59,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:47:59,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:47:59,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:47:59,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:47:59,713 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2022-11-23 13:47:59,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:47:59,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:47:59,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:47:59,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:47:59,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:47:59,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:47:59,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:47:59,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:48:00,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:48:00,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:48:00,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:48:00,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:48:00,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:48:00,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:48:00,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:48:00,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:48:00,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (1/1) ... [2022-11-23 13:48:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:48:00,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:00,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:48:00,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:48:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:48:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 13:48:00,397 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 13:48:00,398 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 13:48:00,398 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 13:48:00,398 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 13:48:00,398 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 13:48:00,398 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 13:48:00,399 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 13:48:00,399 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 13:48:00,399 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 13:48:00,399 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 13:48:00,399 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 13:48:00,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:48:00,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:48:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:48:00,555 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:48:00,557 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:48:09,829 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:48:12,541 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:48:12,541 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-23 13:48:12,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:12 BoogieIcfgContainer [2022-11-23 13:48:12,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:48:12,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:48:12,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:48:12,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:48:12,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:47:54" (1/3) ... [2022-11-23 13:48:12,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f34c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:12, skipping insertion in model container [2022-11-23 13:48:12,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:59" (2/3) ... [2022-11-23 13:48:12,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f34c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:12, skipping insertion in model container [2022-11-23 13:48:12,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:12" (3/3) ... [2022-11-23 13:48:12,559 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.10.cil-2.c [2022-11-23 13:48:12,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:48:12,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:48:12,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:48:12,679 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;@367f706c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:48:12,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:48:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 13:48:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 13:48:12,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:12,708 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] [2022-11-23 13:48:12,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:12,716 INFO L85 PathProgramCache]: Analyzing trace with hash 507387839, now seen corresponding path program 1 times [2022-11-23 13:48:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:12,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114713847] [2022-11-23 13:48:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:13,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:13,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114713847] [2022-11-23 13:48:13,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114713847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:13,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:13,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:48:13,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69407097] [2022-11-23 13:48:13,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:13,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:48:13,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:48:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:48:13,364 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:48:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:14,490 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2022-11-23 13:48:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:48:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2022-11-23 13:48:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:14,519 INFO L225 Difference]: With dead ends: 3767 [2022-11-23 13:48:14,520 INFO L226 Difference]: Without dead ends: 1957 [2022-11-23 13:48:14,531 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 [2022-11-23 13:48:14,535 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:14,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:48:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-23 13:48:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2022-11-23 13:48:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 13:48:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2022-11-23 13:48:14,667 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2022-11-23 13:48:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:14,668 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2022-11-23 13:48:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:48:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2022-11-23 13:48:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 13:48:14,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:14,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:48:14,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1019719759, now seen corresponding path program 1 times [2022-11-23 13:48:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:14,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489884595] [2022-11-23 13:48:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:48:15,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:15,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489884595] [2022-11-23 13:48:15,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489884595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:15,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957673424] [2022-11-23 13:48:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:15,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:15,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:15,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:15,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:48:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:15,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:15,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 13:48:15,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:15,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957673424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:15,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:15,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:48:15,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155882009] [2022-11-23 13:48:15,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:15,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:15,431 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:15,972 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2022-11-23 13:48:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-23 13:48:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:15,985 INFO L225 Difference]: With dead ends: 2569 [2022-11-23 13:48:15,985 INFO L226 Difference]: Without dead ends: 2259 [2022-11-23 13:48:15,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:15,988 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:15,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:48:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-11-23 13:48:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2022-11-23 13:48:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-23 13:48:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2022-11-23 13:48:16,063 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2022-11-23 13:48:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:16,064 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2022-11-23 13:48:16,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2022-11-23 13:48:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 13:48:16,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:16,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:16,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:16,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:16,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:16,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1243783697, now seen corresponding path program 1 times [2022-11-23 13:48:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:16,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76454822] [2022-11-23 13:48:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:16,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:48:16,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:16,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76454822] [2022-11-23 13:48:16,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76454822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913268870] [2022-11-23 13:48:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:16,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:16,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:16,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:48:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 13:48:16,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:16,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913268870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:16,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:16,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:48:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27417587] [2022-11-23 13:48:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:16,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:16,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:16,847 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:17,429 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2022-11-23 13:48:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:17,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-23 13:48:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:17,447 INFO L225 Difference]: With dead ends: 3460 [2022-11-23 13:48:17,447 INFO L226 Difference]: Without dead ends: 2851 [2022-11-23 13:48:17,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:17,455 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:17,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:48:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-11-23 13:48:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2022-11-23 13:48:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-23 13:48:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2022-11-23 13:48:17,584 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2022-11-23 13:48:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:17,585 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2022-11-23 13:48:17,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2022-11-23 13:48:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 13:48:17,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:17,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:17,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:17,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:17,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 725902449, now seen corresponding path program 1 times [2022-11-23 13:48:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845218301] [2022-11-23 13:48:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:48:17,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845218301] [2022-11-23 13:48:17,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845218301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:17,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104771874] [2022-11-23 13:48:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:17,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:17,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:17,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:48:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 13:48:18,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:18,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104771874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:18,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:18,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:48:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186535203] [2022-11-23 13:48:18,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:18,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:18,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:18,304 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:19,039 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2022-11-23 13:48:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-23 13:48:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:19,058 INFO L225 Difference]: With dead ends: 5218 [2022-11-23 13:48:19,058 INFO L226 Difference]: Without dead ends: 4019 [2022-11-23 13:48:19,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:19,065 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:19,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:48:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-11-23 13:48:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2022-11-23 13:48:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-23 13:48:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2022-11-23 13:48:19,234 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2022-11-23 13:48:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:19,235 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2022-11-23 13:48:19,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2022-11-23 13:48:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 13:48:19,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:19,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:19,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:19,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:19,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1055055569, now seen corresponding path program 1 times [2022-11-23 13:48:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:19,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117106468] [2022-11-23 13:48:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:48:19,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117106468] [2022-11-23 13:48:19,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117106468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174802114] [2022-11-23 13:48:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:19,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:19,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:19,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:48:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 13:48:19,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:19,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174802114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:19,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:19,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:48:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462390721] [2022-11-23 13:48:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:19,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:19,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:19,902 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:20,593 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2022-11-23 13:48:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-23 13:48:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:20,625 INFO L225 Difference]: With dead ends: 8686 [2022-11-23 13:48:20,625 INFO L226 Difference]: Without dead ends: 6323 [2022-11-23 13:48:20,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:20,639 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:20,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:48:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-11-23 13:48:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2022-11-23 13:48:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-23 13:48:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2022-11-23 13:48:20,924 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2022-11-23 13:48:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:20,924 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2022-11-23 13:48:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2022-11-23 13:48:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 13:48:20,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:20,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:20,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:21,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1445316721, now seen corresponding path program 1 times [2022-11-23 13:48:21,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:21,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381992209] [2022-11-23 13:48:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:48:21,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:21,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381992209] [2022-11-23 13:48:21,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381992209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:21,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889495084] [2022-11-23 13:48:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:21,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:21,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:21,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:48:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:48:21,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:21,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889495084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:21,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:21,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:48:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576902475] [2022-11-23 13:48:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:21,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:21,601 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:22,627 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2022-11-23 13:48:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-23 13:48:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:22,712 INFO L225 Difference]: With dead ends: 15526 [2022-11-23 13:48:22,713 INFO L226 Difference]: Without dead ends: 10867 [2022-11-23 13:48:22,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:22,737 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:22,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:48:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2022-11-23 13:48:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2022-11-23 13:48:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-23 13:48:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2022-11-23 13:48:23,420 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2022-11-23 13:48:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:23,422 INFO L495 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2022-11-23 13:48:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:48:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2022-11-23 13:48:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 13:48:23,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:23,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:23,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea3e13e-1ae7-435a-bd77-711dc66fc692/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:23,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash 450941649, now seen corresponding path program 1 times [2022-11-23 13:48:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:23,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274467627] [2022-11-23 13:48:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 13:48:24,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:24,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274467627] [2022-11-23 13:48:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274467627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:24,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:24,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:48:24,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795785974] [2022-11-23 13:48:24,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:24,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:24,461 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:26,588 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2022-11-23 13:48:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:48:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-11-23 13:48:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:26,665 INFO L225 Difference]: With dead ends: 26597 [2022-11-23 13:48:26,666 INFO L226 Difference]: Without dead ends: 17411 [2022-11-23 13:48:26,695 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 [2022-11-23 13:48:26,696 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4033 mSDsluCounter, 9794 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4039 SdHoareTripleChecker+Valid, 13094 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:26,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4039 Valid, 13094 Invalid, 1340 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [127 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 13:48:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2022-11-23 13:48:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2022-11-23 13:48:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-23 13:48:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2022-11-23 13:48:27,545 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2022-11-23 13:48:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:27,546 INFO L495 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2022-11-23 13:48:27,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2022-11-23 13:48:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 13:48:27,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:27,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:48:27,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1574564162, now seen corresponding path program 1 times [2022-11-23 13:48:27,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:27,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498443001] [2022-11-23 13:48:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 13:48:28,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498443001] [2022-11-23 13:48:28,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498443001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:28,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:28,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:48:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997619743] [2022-11-23 13:48:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:28,324 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:30,589 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2022-11-23 13:48:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:48:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-23 13:48:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:30,690 INFO L225 Difference]: With dead ends: 36973 [2022-11-23 13:48:30,690 INFO L226 Difference]: Without dead ends: 23323 [2022-11-23 13:48:30,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:48:30,740 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3979 mSDsluCounter, 9680 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3985 SdHoareTripleChecker+Valid, 12952 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:30,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3985 Valid, 12952 Invalid, 1322 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 13:48:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2022-11-23 13:48:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2022-11-23 13:48:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2022-11-23 13:48:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2022-11-23 13:48:32,494 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2022-11-23 13:48:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:32,496 INFO L495 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2022-11-23 13:48:32,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2022-11-23 13:48:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:48:32,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:32,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:48:32,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -827893643, now seen corresponding path program 1 times [2022-11-23 13:48:32,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:32,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200214015] [2022-11-23 13:48:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 13:48:33,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:33,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200214015] [2022-11-23 13:48:33,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200214015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:33,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:33,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:48:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636096795] [2022-11-23 13:48:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:33,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:33,194 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:37,501 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2022-11-23 13:48:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:48:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-23 13:48:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:37,787 INFO L225 Difference]: With dead ends: 72237 [2022-11-23 13:48:37,788 INFO L226 Difference]: Without dead ends: 51955 [2022-11-23 13:48:37,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:48:37,856 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 4221 mSDsluCounter, 6504 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 9786 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:37,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4240 Valid, 9786 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:48:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2022-11-23 13:48:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2022-11-23 13:48:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-23 13:48:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2022-11-23 13:48:40,888 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2022-11-23 13:48:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:40,889 INFO L495 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2022-11-23 13:48:40,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2022-11-23 13:48:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 13:48:40,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:40,961 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:48:40,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -185875802, now seen corresponding path program 1 times [2022-11-23 13:48:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:40,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325458686] [2022-11-23 13:48:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 13:48:41,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325458686] [2022-11-23 13:48:41,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325458686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:41,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:41,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:48:41,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331811778] [2022-11-23 13:48:41,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:41,662 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:47,419 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2022-11-23 13:48:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:48:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-23 13:48:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:47,756 INFO L225 Difference]: With dead ends: 108861 [2022-11-23 13:48:47,757 INFO L226 Difference]: Without dead ends: 69163 [2022-11-23 13:48:47,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:48:47,883 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4042 mSDsluCounter, 9740 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4048 SdHoareTripleChecker+Valid, 13012 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:47,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4048 Valid, 13012 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 13:48:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2022-11-23 13:48:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2022-11-23 13:48:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2022-11-23 13:48:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2022-11-23 13:48:52,780 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2022-11-23 13:48:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:52,781 INFO L495 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2022-11-23 13:48:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:48:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2022-11-23 13:48:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 13:48:52,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:52,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:52,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:48:52,881 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash -955243891, now seen corresponding path program 1 times [2022-11-23 13:48:52,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:52,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694223281] [2022-11-23 13:48:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:52,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 13:48:53,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694223281] [2022-11-23 13:48:53,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694223281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:53,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:53,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:48:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470185560] [2022-11-23 13:48:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:53,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:53,399 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)