./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.04.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.04.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:43:16,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:43:16,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:43:16,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:43:16,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:43:16,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:43:16,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:43:16,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:43:16,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:43:16,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:43:16,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:43:16,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:43:16,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:43:16,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:43:16,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:43:16,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:43:16,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:43:16,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:43:16,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:43:16,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:43:16,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:43:16,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:43:16,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:43:16,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:43:16,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:43:16,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:43:16,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:43:16,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:43:16,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:43:16,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:43:16,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:43:16,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:43:16,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:43:16,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:43:16,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:43:16,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:43:16,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:43:16,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:43:16,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:43:16,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:43:16,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:43:16,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:43:16,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:43:16,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:43:16,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:43:16,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:43:16,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:43:16,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:43:16,361 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:43:16,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:43:16,362 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:43:16,362 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:43:16,363 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:43:16,363 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:43:16,363 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:43:16,363 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:43:16,364 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:43:16,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:43:16,364 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:43:16,364 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:43:16,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:43:16,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:43:16,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:43:16,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:43:16,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:43:16,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:43:16,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:43:16,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:43:16,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:43:16,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:43:16,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:43:16,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:43:16,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:43:16,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:43:16,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:43:16,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:43:16,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:43:16,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:43:16,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:43:16,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:43:16,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:43:16,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:43:16,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:43:16,369 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_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa [2022-11-22 02:43:16,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:43:16,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:43:16,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:43:16,684 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:43:16,685 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:43:16,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/systemc/transmitter.04.cil.c [2022-11-22 02:43:19,849 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:43:20,035 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:43:20,035 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/sv-benchmarks/c/systemc/transmitter.04.cil.c [2022-11-22 02:43:20,049 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/data/a63c08e5f/c057a14418254ba6b7c27ca43dcd9528/FLAG89fcc059d [2022-11-22 02:43:20,064 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/data/a63c08e5f/c057a14418254ba6b7c27ca43dcd9528 [2022-11-22 02:43:20,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:43:20,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:43:20,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:43:20,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:43:20,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:43:20,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1820e38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20, skipping insertion in model container [2022-11-22 02:43:20,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:43:20,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:43:20,327 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_38de562c-3124-4e9f-8985-aa1a166dd7ef/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2022-11-22 02:43:20,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:43:20,460 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:43:20,471 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_38de562c-3124-4e9f-8985-aa1a166dd7ef/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2022-11-22 02:43:20,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:43:20,530 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:43:20,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20 WrapperNode [2022-11-22 02:43:20,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:43:20,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:43:20,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:43:20,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:43:20,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,600 INFO L138 Inliner]: procedures = 36, calls = 42, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 378 [2022-11-22 02:43:20,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:43:20,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:43:20,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:43:20,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:43:20,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,660 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:43:20,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:43:20,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:43:20,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:43:20,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (1/1) ... [2022-11-22 02:43:20,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:43:20,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:20,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:43:20,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:43:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:43:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 02:43:20,775 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 02:43:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 02:43:20,775 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 02:43:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 02:43:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 02:43:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 02:43:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 02:43:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 02:43:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 02:43:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:43:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 02:43:20,777 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 02:43:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:43:20,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:43:20,914 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:43:20,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:43:21,498 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:43:21,818 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:43:21,819 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-22 02:43:21,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:43:21 BoogieIcfgContainer [2022-11-22 02:43:21,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:43:21,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:43:21,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:43:21,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:43:21,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:43:20" (1/3) ... [2022-11-22 02:43:21,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d198bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:43:21, skipping insertion in model container [2022-11-22 02:43:21,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:20" (2/3) ... [2022-11-22 02:43:21,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d198bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:43:21, skipping insertion in model container [2022-11-22 02:43:21,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:43:21" (3/3) ... [2022-11-22 02:43:21,837 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2022-11-22 02:43:21,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:43:21,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:43:21,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:43:21,945 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;@7b550c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:43:21,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:43:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-22 02:43:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:43:21,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:21,965 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] [2022-11-22 02:43:21,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2018350875, now seen corresponding path program 1 times [2022-11-22 02:43:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:21,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379715570] [2022-11-22 02:43:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:21,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:22,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:22,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379715570] [2022-11-22 02:43:22,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379715570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:22,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:22,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:43:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258731086] [2022-11-22 02:43:22,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:22,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:43:22,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:43:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:43:22,474 INFO L87 Difference]: Start difference. First operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-22 02:43:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:22,798 INFO L93 Difference]: Finished difference Result 281 states and 422 transitions. [2022-11-22 02:43:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:43:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 45 [2022-11-22 02:43:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:22,810 INFO L225 Difference]: With dead ends: 281 [2022-11-22 02:43:22,811 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 02:43:22,815 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 [2022-11-22 02:43:22,818 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 243 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:22,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 354 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:43:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 02:43:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-11-22 02:43:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.437956204379562) internal successors, (197), 139 states have internal predecessors, (197), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 02:43:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 257 transitions. [2022-11-22 02:43:22,879 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 257 transitions. Word has length 45 [2022-11-22 02:43:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:22,880 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 257 transitions. [2022-11-22 02:43:22,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-22 02:43:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 257 transitions. [2022-11-22 02:43:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:43:22,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:22,883 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] [2022-11-22 02:43:22,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:43:22,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash -966901786, now seen corresponding path program 1 times [2022-11-22 02:43:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:22,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021143804] [2022-11-22 02:43:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:22,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:23,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:23,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021143804] [2022-11-22 02:43:23,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021143804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:23,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:23,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:43:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232993881] [2022-11-22 02:43:23,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:23,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:43:23,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:43:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:43:23,125 INFO L87 Difference]: Start difference. First operand 180 states and 257 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-22 02:43:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:23,703 INFO L93 Difference]: Finished difference Result 1021 states and 1523 transitions. [2022-11-22 02:43:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:43:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 45 [2022-11-22 02:43:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:23,717 INFO L225 Difference]: With dead ends: 1021 [2022-11-22 02:43:23,717 INFO L226 Difference]: Without dead ends: 846 [2022-11-22 02:43:23,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:43:23,727 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 519 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:23,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 575 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:43:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-22 02:43:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 810. [2022-11-22 02:43:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 627 states have (on average 1.4242424242424243) internal successors, (893), 635 states have internal predecessors, (893), 122 states have call successors, (122), 60 states have call predecessors, (122), 60 states have return successors, (172), 115 states have call predecessors, (172), 122 states have call successors, (172) [2022-11-22 02:43:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1187 transitions. [2022-11-22 02:43:23,873 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1187 transitions. Word has length 45 [2022-11-22 02:43:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:23,874 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1187 transitions. [2022-11-22 02:43:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-22 02:43:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1187 transitions. [2022-11-22 02:43:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:43:23,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:23,878 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] [2022-11-22 02:43:23,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:43:23,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1938576473, now seen corresponding path program 1 times [2022-11-22 02:43:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833523147] [2022-11-22 02:43:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:24,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:24,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833523147] [2022-11-22 02:43:24,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833523147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:24,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:24,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:43:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328970051] [2022-11-22 02:43:24,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:43:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:43:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:43:24,039 INFO L87 Difference]: Start difference. First operand 810 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-22 02:43:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:24,721 INFO L93 Difference]: Finished difference Result 3163 states and 4753 transitions. [2022-11-22 02:43:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:43:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 45 [2022-11-22 02:43:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:24,737 INFO L225 Difference]: With dead ends: 3163 [2022-11-22 02:43:24,737 INFO L226 Difference]: Without dead ends: 2358 [2022-11-22 02:43:24,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:43:24,743 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 509 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:24,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 589 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:43:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-11-22 02:43:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2128. [2022-11-22 02:43:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1675 states have (on average 1.4382089552238806) internal successors, (2409), 1681 states have internal predecessors, (2409), 288 states have call successors, (288), 148 states have call predecessors, (288), 164 states have return successors, (494), 299 states have call predecessors, (494), 288 states have call successors, (494) [2022-11-22 02:43:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3191 transitions. [2022-11-22 02:43:24,987 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3191 transitions. Word has length 45 [2022-11-22 02:43:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:24,987 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 3191 transitions. [2022-11-22 02:43:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-22 02:43:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3191 transitions. [2022-11-22 02:43:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:43:24,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:24,993 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] [2022-11-22 02:43:24,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:43:24,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1299791994, now seen corresponding path program 1 times [2022-11-22 02:43:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:24,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547878938] [2022-11-22 02:43:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:24,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:25,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:25,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547878938] [2022-11-22 02:43:25,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547878938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:25,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:25,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:43:25,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234326122] [2022-11-22 02:43:25,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:25,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:43:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:43:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:25,218 INFO L87 Difference]: Start difference. First operand 2128 states and 3191 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:25,849 INFO L93 Difference]: Finished difference Result 5982 states and 8997 transitions. [2022-11-22 02:43:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:43:25,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 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 45 [2022-11-22 02:43:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:25,873 INFO L225 Difference]: With dead ends: 5982 [2022-11-22 02:43:25,873 INFO L226 Difference]: Without dead ends: 3860 [2022-11-22 02:43:25,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:43:25,882 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 435 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:25,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 314 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:43:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2022-11-22 02:43:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3384. [2022-11-22 02:43:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 2687 states have (on average 1.4194268701153703) internal successors, (3814), 2696 states have internal predecessors, (3814), 426 states have call successors, (426), 240 states have call predecessors, (426), 270 states have return successors, (725), 448 states have call predecessors, (725), 426 states have call successors, (725) [2022-11-22 02:43:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 4965 transitions. [2022-11-22 02:43:26,179 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 4965 transitions. Word has length 45 [2022-11-22 02:43:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:26,182 INFO L495 AbstractCegarLoop]: Abstraction has 3384 states and 4965 transitions. [2022-11-22 02:43:26,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 4965 transitions. [2022-11-22 02:43:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:43:26,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:26,185 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] [2022-11-22 02:43:26,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:43:26,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash 602838576, now seen corresponding path program 1 times [2022-11-22 02:43:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919487987] [2022-11-22 02:43:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:26,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:26,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919487987] [2022-11-22 02:43:26,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919487987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:26,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:26,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:43:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653613646] [2022-11-22 02:43:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:26,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:43:26,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:43:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:26,421 INFO L87 Difference]: Start difference. First operand 3384 states and 4965 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:27,257 INFO L93 Difference]: Finished difference Result 10166 states and 14972 transitions. [2022-11-22 02:43:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:43:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 46 [2022-11-22 02:43:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:27,300 INFO L225 Difference]: With dead ends: 10166 [2022-11-22 02:43:27,301 INFO L226 Difference]: Without dead ends: 6788 [2022-11-22 02:43:27,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:43:27,314 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 392 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:27,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 314 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:43:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6788 states. [2022-11-22 02:43:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6788 to 6046. [2022-11-22 02:43:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 4815 states have (on average 1.412461059190031) internal successors, (6801), 4828 states have internal predecessors, (6801), 740 states have call successors, (740), 420 states have call predecessors, (740), 490 states have return successors, (1318), 798 states have call predecessors, (1318), 740 states have call successors, (1318) [2022-11-22 02:43:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 8859 transitions. [2022-11-22 02:43:27,901 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 8859 transitions. Word has length 46 [2022-11-22 02:43:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:27,902 INFO L495 AbstractCegarLoop]: Abstraction has 6046 states and 8859 transitions. [2022-11-22 02:43:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 8859 transitions. [2022-11-22 02:43:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:43:27,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:27,903 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] [2022-11-22 02:43:27,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:43:27,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1616814173, now seen corresponding path program 1 times [2022-11-22 02:43:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527246585] [2022-11-22 02:43:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:28,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:28,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527246585] [2022-11-22 02:43:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527246585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:28,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:43:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760453967] [2022-11-22 02:43:28,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:28,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:43:28,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:43:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:28,098 INFO L87 Difference]: Start difference. First operand 6046 states and 8859 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:29,425 INFO L93 Difference]: Finished difference Result 16750 states and 24959 transitions. [2022-11-22 02:43:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:43:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 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 47 [2022-11-22 02:43:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:29,522 INFO L225 Difference]: With dead ends: 16750 [2022-11-22 02:43:29,522 INFO L226 Difference]: Without dead ends: 10710 [2022-11-22 02:43:29,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:43:29,542 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 360 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:29,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 327 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:43:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2022-11-22 02:43:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 9576. [2022-11-22 02:43:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 7605 states have (on average 1.3982905982905982) internal successors, (10634), 7634 states have internal predecessors, (10634), 1188 states have call successors, (1188), 696 states have call predecessors, (1188), 782 states have return successors, (2091), 1246 states have call predecessors, (2091), 1188 states have call successors, (2091) [2022-11-22 02:43:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 13913 transitions. [2022-11-22 02:43:30,608 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 13913 transitions. Word has length 47 [2022-11-22 02:43:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:30,608 INFO L495 AbstractCegarLoop]: Abstraction has 9576 states and 13913 transitions. [2022-11-22 02:43:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 13913 transitions. [2022-11-22 02:43:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:43:30,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:30,610 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] [2022-11-22 02:43:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:43:30,611 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash -326246836, now seen corresponding path program 1 times [2022-11-22 02:43:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:30,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995182072] [2022-11-22 02:43:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:30,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995182072] [2022-11-22 02:43:30,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995182072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:30,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:30,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:43:30,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078440753] [2022-11-22 02:43:30,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:30,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:43:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:43:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:30,778 INFO L87 Difference]: Start difference. First operand 9576 states and 13913 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:32,878 INFO L93 Difference]: Finished difference Result 26222 states and 38781 transitions. [2022-11-22 02:43:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:43:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 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 48 [2022-11-22 02:43:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:32,987 INFO L225 Difference]: With dead ends: 26222 [2022-11-22 02:43:32,987 INFO L226 Difference]: Without dead ends: 16652 [2022-11-22 02:43:33,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:43:33,023 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 362 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:33,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 341 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:43:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2022-11-22 02:43:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 15498. [2022-11-22 02:43:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 12290 states have (on average 1.3807160292921075) internal successors, (16969), 12345 states have internal predecessors, (16969), 1933 states have call successors, (1933), 1166 states have call predecessors, (1933), 1274 states have return successors, (3359), 1987 states have call predecessors, (3359), 1933 states have call successors, (3359) [2022-11-22 02:43:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 22261 transitions. [2022-11-22 02:43:34,747 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 22261 transitions. Word has length 48 [2022-11-22 02:43:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:34,748 INFO L495 AbstractCegarLoop]: Abstraction has 15498 states and 22261 transitions. [2022-11-22 02:43:34,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:43:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 22261 transitions. [2022-11-22 02:43:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:43:34,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:34,750 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] [2022-11-22 02:43:34,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:43:34,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1092608959, now seen corresponding path program 1 times [2022-11-22 02:43:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:34,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424184918] [2022-11-22 02:43:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:34,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:34,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424184918] [2022-11-22 02:43:34,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424184918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:34,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:34,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:43:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374167447] [2022-11-22 02:43:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:34,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:43:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:43:34,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:43:34,818 INFO L87 Difference]: Start difference. First operand 15498 states and 22261 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:43:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:38,286 INFO L93 Difference]: Finished difference Result 45968 states and 67924 transitions. [2022-11-22 02:43:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:43:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-22 02:43:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:38,443 INFO L225 Difference]: With dead ends: 45968 [2022-11-22 02:43:38,443 INFO L226 Difference]: Without dead ends: 30475 [2022-11-22 02:43:38,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:43:38,509 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:38,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 226 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:43:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30475 states. [2022-11-22 02:43:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30475 to 30238. [2022-11-22 02:43:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30238 states, 23827 states have (on average 1.3496873295001468) internal successors, (32159), 23936 states have internal predecessors, (32159), 3862 states have call successors, (3862), 2332 states have call predecessors, (3862), 2548 states have return successors, (6714), 3970 states have call predecessors, (6714), 3862 states have call successors, (6714) [2022-11-22 02:43:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30238 states to 30238 states and 42735 transitions. [2022-11-22 02:43:42,221 INFO L78 Accepts]: Start accepts. Automaton has 30238 states and 42735 transitions. Word has length 49 [2022-11-22 02:43:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:42,221 INFO L495 AbstractCegarLoop]: Abstraction has 30238 states and 42735 transitions. [2022-11-22 02:43:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:43:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 30238 states and 42735 transitions. [2022-11-22 02:43:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:43:42,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:42,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:42,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:43:42,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash 98197573, now seen corresponding path program 1 times [2022-11-22 02:43:42,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:42,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882211873] [2022-11-22 02:43:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:42,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:43:42,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:42,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882211873] [2022-11-22 02:43:42,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882211873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:42,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:42,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:43:42,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684771208] [2022-11-22 02:43:42,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:42,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:43:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:43:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:43:42,321 INFO L87 Difference]: Start difference. First operand 30238 states and 42735 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 02:43:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:45,666 INFO L93 Difference]: Finished difference Result 56778 states and 81509 transitions. [2022-11-22 02:43:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:43:45,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2022-11-22 02:43:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:45,878 INFO L225 Difference]: With dead ends: 56778 [2022-11-22 02:43:45,878 INFO L226 Difference]: Without dead ends: 41286 [2022-11-22 02:43:45,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:43:45,930 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 78 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:45,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 309 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:43:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2022-11-22 02:43:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 34462. [2022-11-22 02:43:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 27577 states have (on average 1.3667911665518366) internal successors, (37692), 27686 states have internal predecessors, (37692), 4099 states have call successors, (4099), 2569 states have call predecessors, (4099), 2785 states have return successors, (6951), 4207 states have call predecessors, (6951), 4099 states have call successors, (6951) [2022-11-22 02:43:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 48742 transitions. [2022-11-22 02:43:49,458 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 48742 transitions. Word has length 67 [2022-11-22 02:43:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:49,459 INFO L495 AbstractCegarLoop]: Abstraction has 34462 states and 48742 transitions. [2022-11-22 02:43:49,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 02:43:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 48742 transitions. [2022-11-22 02:43:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:43:49,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:49,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:49,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:43:49,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash -65364597, now seen corresponding path program 1 times [2022-11-22 02:43:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:49,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510200203] [2022-11-22 02:43:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:43:49,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510200203] [2022-11-22 02:43:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510200203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667175272] [2022-11-22 02:43:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:49,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:49,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:49,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:43:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:43:49,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:43:50,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:43:50,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667175272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:50,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:43:50,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:43:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056119231] [2022-11-22 02:43:50,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:50,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:43:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:43:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:50,009 INFO L87 Difference]: Start difference. First operand 34462 states and 48742 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 02:43:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:53,688 INFO L93 Difference]: Finished difference Result 64573 states and 91591 transitions. [2022-11-22 02:43:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:43:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 95 [2022-11-22 02:43:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:53,868 INFO L225 Difference]: With dead ends: 64573 [2022-11-22 02:43:53,869 INFO L226 Difference]: Without dead ends: 41145 [2022-11-22 02:43:53,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:53,941 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 72 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:53,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 225 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:43:53,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41145 states. [2022-11-22 02:43:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41145 to 37010. [2022-11-22 02:43:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37010 states, 29361 states have (on average 1.34266544055039) internal successors, (39422), 29502 states have internal predecessors, (39422), 4615 states have call successors, (4615), 2905 states have call predecessors, (4615), 3033 states have return successors, (6993), 4603 states have call predecessors, (6993), 4615 states have call successors, (6993) [2022-11-22 02:43:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37010 states to 37010 states and 51030 transitions. [2022-11-22 02:43:57,515 INFO L78 Accepts]: Start accepts. Automaton has 37010 states and 51030 transitions. Word has length 95 [2022-11-22 02:43:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:57,516 INFO L495 AbstractCegarLoop]: Abstraction has 37010 states and 51030 transitions. [2022-11-22 02:43:57,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 02:43:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 37010 states and 51030 transitions. [2022-11-22 02:43:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:43:57,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:57,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:57,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:57,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:57,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash 925800076, now seen corresponding path program 1 times [2022-11-22 02:43:57,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:57,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596133473] [2022-11-22 02:43:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:57,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:43:57,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:57,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596133473] [2022-11-22 02:43:57,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596133473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:57,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506147684] [2022-11-22 02:43:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:57,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:57,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:57,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:57,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38de562c-3124-4e9f-8985-aa1a166dd7ef/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:43:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:43:58,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:58,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:43:58,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506147684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:58,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:43:58,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 02:43:58,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634099074] [2022-11-22 02:43:58,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:58,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:43:58,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:43:58,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:43:58,125 INFO L87 Difference]: Start difference. First operand 37010 states and 51030 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 02:44:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:01,521 INFO L93 Difference]: Finished difference Result 75874 states and 105042 transitions. [2022-11-22 02:44:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:44:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 95 [2022-11-22 02:44:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:01,709 INFO L225 Difference]: With dead ends: 75874 [2022-11-22 02:44:01,709 INFO L226 Difference]: Without dead ends: 44514 [2022-11-22 02:44:01,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:44:01,790 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 69 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:01,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 304 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:44:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44514 states.