./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS --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 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f --- 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-8393723 [2022-11-19 07:24:44,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:24:44,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:24:44,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:24:44,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:24:44,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:24:44,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:24:44,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:24:44,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:24:44,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:24:44,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:24:44,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:24:44,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:24:44,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:24:44,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:24:44,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:24:44,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:24:44,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:24:44,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:24:44,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:24:44,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:24:44,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:24:44,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:24:44,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:24:44,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:24:44,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:24:44,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:24:44,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:24:44,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:24:44,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:24:44,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:24:44,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:24:44,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:24:44,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:24:44,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:24:44,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:24:44,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:24:44,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:24:44,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:24:44,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:24:44,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:24:44,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:24:44,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:24:44,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:24:44,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:24:44,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:24:44,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:24:44,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:24:44,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:24:44,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:24:44,360 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:24:44,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:24:44,364 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:24:44,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:24:44,365 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:24:44,365 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:24:44,365 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:24:44,365 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:24:44,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:24:44,366 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:24:44,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:24:44,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:24:44,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:24:44,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:24:44,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:24:44,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:24:44,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:24:44,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:24:44,368 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:24:44,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:24:44,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:24:44,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:24:44,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:24:44,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:24:44,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:24:44,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:24:44,369 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:24:44,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:24:44,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:24:44,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:24:44,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:24:44,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:24:44,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:24:44,371 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_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f [2022-11-19 07:24:44,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:24:44,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:24:44,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:24:44,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:24:44,743 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:24:44,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-11-19 07:24:44,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/data/113dd793e/9adf77e83c5a43e493c95df814123879/FLAG6b923f22e [2022-11-19 07:24:45,367 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:24:45,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-11-19 07:24:45,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/data/113dd793e/9adf77e83c5a43e493c95df814123879/FLAG6b923f22e [2022-11-19 07:24:45,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/data/113dd793e/9adf77e83c5a43e493c95df814123879 [2022-11-19 07:24:45,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:24:45,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:24:45,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:24:45,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:24:45,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:24:45,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:24:45" (1/1) ... [2022-11-19 07:24:45,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ede9e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:45, skipping insertion in model container [2022-11-19 07:24:45,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:24:45" (1/1) ... [2022-11-19 07:24:45,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:24:45,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:24:45,984 WARN L234 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_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-11-19 07:24:46,075 WARN L234 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_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-11-19 07:24:46,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:24:46,242 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:24:46,258 WARN L234 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_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-11-19 07:24:46,278 WARN L234 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_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-11-19 07:24:46,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:24:46,387 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:24:46,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46 WrapperNode [2022-11-19 07:24:46,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:24:46,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:24:46,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:24:46,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:24:46,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,469 INFO L138 Inliner]: procedures = 75, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 967 [2022-11-19 07:24:46,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:24:46,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:24:46,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:24:46,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:24:46,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:24:46,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:24:46,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:24:46,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:24:46,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (1/1) ... [2022-11-19 07:24:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:24:46,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:46,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:24:46,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:24:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:24:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:24:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:24:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 07:24:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 07:24:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:24:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:24:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:24:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:24:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 07:24:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 07:24:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:24:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:24:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:24:46,621 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:24:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 07:24:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 07:24:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 07:24:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 07:24:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 07:24:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 07:24:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:24:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:24:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:24:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:24:46,624 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:24:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 07:24:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 07:24:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:24:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:24:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:24:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:24:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 07:24:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 07:24:46,862 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:24:46,864 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:24:47,795 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-19 07:24:47,795 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-19 07:24:47,870 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:24:48,380 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:24:48,380 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-19 07:24:48,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:24:48 BoogieIcfgContainer [2022-11-19 07:24:48,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:24:48,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:24:48,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:24:48,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:24:48,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:24:45" (1/3) ... [2022-11-19 07:24:48,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb1223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:24:48, skipping insertion in model container [2022-11-19 07:24:48,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:46" (2/3) ... [2022-11-19 07:24:48,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb1223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:24:48, skipping insertion in model container [2022-11-19 07:24:48,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:24:48" (3/3) ... [2022-11-19 07:24:48,401 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-11-19 07:24:48,421 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:24:48,421 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:24:48,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:24:48,497 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;@720fa345, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:24:48,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:24:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 251 states, 191 states have (on average 1.544502617801047) internal successors, (295), 199 states have internal predecessors, (295), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-19 07:24:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:24:48,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:48,513 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] [2022-11-19 07:24:48,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash -529609248, now seen corresponding path program 1 times [2022-11-19 07:24:48,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:48,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034757053] [2022-11-19 07:24:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:48,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:48,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034757053] [2022-11-19 07:24:48,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034757053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:48,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:48,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:24:48,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477098732] [2022-11-19 07:24:48,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:24:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:48,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:24:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:24:48,972 INFO L87 Difference]: Start difference. First operand has 251 states, 191 states have (on average 1.544502617801047) internal successors, (295), 199 states have internal predecessors, (295), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:24:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:49,589 INFO L93 Difference]: Finished difference Result 624 states and 936 transitions. [2022-11-19 07:24:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:24:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-19 07:24:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:49,605 INFO L225 Difference]: With dead ends: 624 [2022-11-19 07:24:49,605 INFO L226 Difference]: Without dead ends: 374 [2022-11-19 07:24:49,610 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 [2022-11-19 07:24:49,616 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 429 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:49,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 662 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:24:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-19 07:24:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2022-11-19 07:24:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 272 states have (on average 1.4522058823529411) internal successors, (395), 277 states have internal predecessors, (395), 62 states have call successors, (62), 29 states have call predecessors, (62), 27 states have return successors, (61), 58 states have call predecessors, (61), 58 states have call successors, (61) [2022-11-19 07:24:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 518 transitions. [2022-11-19 07:24:49,733 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 518 transitions. Word has length 44 [2022-11-19 07:24:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:49,734 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 518 transitions. [2022-11-19 07:24:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:24:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 518 transitions. [2022-11-19 07:24:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:24:49,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:49,737 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] [2022-11-19 07:24:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:24:49,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash -855837910, now seen corresponding path program 1 times [2022-11-19 07:24:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:49,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738628299] [2022-11-19 07:24:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:49,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:49,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738628299] [2022-11-19 07:24:49,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738628299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:49,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:24:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371959031] [2022-11-19 07:24:49,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:24:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:24:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:49,975 INFO L87 Difference]: Start difference. First operand 363 states and 518 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:24:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:51,006 INFO L93 Difference]: Finished difference Result 900 states and 1241 transitions. [2022-11-19 07:24:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:24:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 07:24:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:51,015 INFO L225 Difference]: With dead ends: 900 [2022-11-19 07:24:51,015 INFO L226 Difference]: Without dead ends: 434 [2022-11-19 07:24:51,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:24:51,022 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 922 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:51,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 1136 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:24:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-19 07:24:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 349. [2022-11-19 07:24:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 258 states have (on average 1.4031007751937985) internal successors, (362), 263 states have internal predecessors, (362), 62 states have call successors, (62), 29 states have call predecessors, (62), 27 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-19 07:24:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 482 transitions. [2022-11-19 07:24:51,074 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 482 transitions. Word has length 45 [2022-11-19 07:24:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:51,075 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 482 transitions. [2022-11-19 07:24:51,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:24:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 482 transitions. [2022-11-19 07:24:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:24:51,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:51,098 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] [2022-11-19 07:24:51,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:24:51,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash 397460268, now seen corresponding path program 1 times [2022-11-19 07:24:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022194816] [2022-11-19 07:24:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:51,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022194816] [2022-11-19 07:24:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022194816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:51,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:51,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:24:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136298251] [2022-11-19 07:24:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:24:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:24:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:24:51,372 INFO L87 Difference]: Start difference. First operand 349 states and 482 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:24:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:52,319 INFO L93 Difference]: Finished difference Result 651 states and 850 transitions. [2022-11-19 07:24:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:24:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 07:24:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:52,325 INFO L225 Difference]: With dead ends: 651 [2022-11-19 07:24:52,325 INFO L226 Difference]: Without dead ends: 477 [2022-11-19 07:24:52,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:24:52,334 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 515 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:52,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1044 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:24:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-19 07:24:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 451. [2022-11-19 07:24:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 326 states have (on average 1.361963190184049) internal successors, (444), 331 states have internal predecessors, (444), 82 states have call successors, (82), 43 states have call predecessors, (82), 41 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-19 07:24:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 604 transitions. [2022-11-19 07:24:52,402 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 604 transitions. Word has length 46 [2022-11-19 07:24:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:52,403 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 604 transitions. [2022-11-19 07:24:52,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:24:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 604 transitions. [2022-11-19 07:24:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:24:52,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:52,406 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] [2022-11-19 07:24:52,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:24:52,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1333074893, now seen corresponding path program 1 times [2022-11-19 07:24:52,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:52,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071448348] [2022-11-19 07:24:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:52,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:52,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071448348] [2022-11-19 07:24:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071448348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:52,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:52,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:52,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115149541] [2022-11-19 07:24:52,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:52,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:52,500 INFO L87 Difference]: Start difference. First operand 451 states and 604 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:52,636 INFO L93 Difference]: Finished difference Result 716 states and 940 transitions. [2022-11-19 07:24:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 07:24:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:52,638 INFO L225 Difference]: With dead ends: 716 [2022-11-19 07:24:52,639 INFO L226 Difference]: Without dead ends: 170 [2022-11-19 07:24:52,654 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 [2022-11-19 07:24:52,655 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:52,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 285 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:24:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-19 07:24:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-19 07:24:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 137 states have (on average 1.5255474452554745) internal successors, (209), 139 states have internal predecessors, (209), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 07:24:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 259 transitions. [2022-11-19 07:24:52,679 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 259 transitions. Word has length 47 [2022-11-19 07:24:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:52,680 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 259 transitions. [2022-11-19 07:24:52,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 259 transitions. [2022-11-19 07:24:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:24:52,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:52,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:24:52,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -793776971, now seen corresponding path program 1 times [2022-11-19 07:24:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:52,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120762481] [2022-11-19 07:24:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:52,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:52,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120762481] [2022-11-19 07:24:52,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120762481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:52,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:52,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:24:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073607811] [2022-11-19 07:24:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:52,851 INFO L87 Difference]: Start difference. First operand 170 states and 259 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:24:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:53,752 INFO L93 Difference]: Finished difference Result 948 states and 1540 transitions. [2022-11-19 07:24:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:24:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-19 07:24:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:53,763 INFO L225 Difference]: With dead ends: 948 [2022-11-19 07:24:53,763 INFO L226 Difference]: Without dead ends: 784 [2022-11-19 07:24:53,765 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 [2022-11-19 07:24:53,768 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 1149 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:53,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1186 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:24:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-11-19 07:24:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 771. [2022-11-19 07:24:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 637 states have (on average 1.5211930926216641) internal successors, (969), 642 states have internal predecessors, (969), 103 states have call successors, (103), 31 states have call predecessors, (103), 30 states have return successors, (155), 98 states have call predecessors, (155), 101 states have call successors, (155) [2022-11-19 07:24:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1227 transitions. [2022-11-19 07:24:53,856 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1227 transitions. Word has length 62 [2022-11-19 07:24:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:53,856 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1227 transitions. [2022-11-19 07:24:53,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:24:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1227 transitions. [2022-11-19 07:24:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:24:53,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:53,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:53,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:24:53,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash 681475985, now seen corresponding path program 1 times [2022-11-19 07:24:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:53,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290557707] [2022-11-19 07:24:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:24:54,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:54,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290557707] [2022-11-19 07:24:54,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290557707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:54,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459273799] [2022-11-19 07:24:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:54,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:54,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:54,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:24:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:24:54,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459273799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:54,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:54,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:24:54,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633054875] [2022-11-19 07:24:54,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:54,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:54,512 INFO L87 Difference]: Start difference. First operand 771 states and 1227 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:54,773 INFO L93 Difference]: Finished difference Result 2285 states and 3745 transitions. [2022-11-19 07:24:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:54,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 07:24:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:54,784 INFO L225 Difference]: With dead ends: 2285 [2022-11-19 07:24:54,784 INFO L226 Difference]: Without dead ends: 1520 [2022-11-19 07:24:54,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:54,793 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 231 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:54,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 437 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:24:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-11-19 07:24:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1511. [2022-11-19 07:24:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1255 states have (on average 1.5171314741035857) internal successors, (1904), 1263 states have internal predecessors, (1904), 195 states have call successors, (195), 61 states have call predecessors, (195), 60 states have return successors, (297), 187 states have call predecessors, (297), 193 states have call successors, (297) [2022-11-19 07:24:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2396 transitions. [2022-11-19 07:24:54,946 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2396 transitions. Word has length 123 [2022-11-19 07:24:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:54,946 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 2396 transitions. [2022-11-19 07:24:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2396 transitions. [2022-11-19 07:24:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:24:54,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:54,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:54,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:55,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:55,166 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1999679183, now seen corresponding path program 1 times [2022-11-19 07:24:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:55,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771703805] [2022-11-19 07:24:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:24:55,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771703805] [2022-11-19 07:24:55,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771703805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541306626] [2022-11-19 07:24:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:55,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:55,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:24:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:24:55,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541306626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:55,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:55,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:24:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657819180] [2022-11-19 07:24:55,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:55,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:55,705 INFO L87 Difference]: Start difference. First operand 1511 states and 2396 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:56,076 INFO L93 Difference]: Finished difference Result 4490 states and 7326 transitions. [2022-11-19 07:24:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:56,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 07:24:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:56,093 INFO L225 Difference]: With dead ends: 4490 [2022-11-19 07:24:56,093 INFO L226 Difference]: Without dead ends: 2985 [2022-11-19 07:24:56,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:56,101 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 228 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:56,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 437 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:24:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2985 states. [2022-11-19 07:24:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2985 to 2971. [2022-11-19 07:24:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2476 states have (on average 1.5121163166397416) internal successors, (3744), 2490 states have internal predecessors, (3744), 374 states have call successors, (374), 121 states have call predecessors, (374), 120 states have return successors, (572), 360 states have call predecessors, (572), 372 states have call successors, (572) [2022-11-19 07:24:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4690 transitions. [2022-11-19 07:24:56,363 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4690 transitions. Word has length 123 [2022-11-19 07:24:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:56,363 INFO L495 AbstractCegarLoop]: Abstraction has 2971 states and 4690 transitions. [2022-11-19 07:24:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4690 transitions. [2022-11-19 07:24:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:24:56,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:56,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:56,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:24:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:24:56,579 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1534532719, now seen corresponding path program 1 times [2022-11-19 07:24:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711623217] [2022-11-19 07:24:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:56,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:24:56,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:56,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711623217] [2022-11-19 07:24:56,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711623217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:56,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653282804] [2022-11-19 07:24:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:56,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:56,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:56,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:24:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:24:57,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653282804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:57,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:57,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:24:57,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605094803] [2022-11-19 07:24:57,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:57,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:57,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:57,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:57,066 INFO L87 Difference]: Start difference. First operand 2971 states and 4690 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:57,691 INFO L93 Difference]: Finished difference Result 8840 states and 14347 transitions. [2022-11-19 07:24:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 07:24:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:57,724 INFO L225 Difference]: With dead ends: 8840 [2022-11-19 07:24:57,725 INFO L226 Difference]: Without dead ends: 5875 [2022-11-19 07:24:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:57,738 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 210 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:57,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 434 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:24:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2022-11-19 07:24:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5851. [2022-11-19 07:24:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5851 states, 4888 states have (on average 1.5065466448445173) internal successors, (7364), 4914 states have internal predecessors, (7364), 722 states have call successors, (722), 241 states have call predecessors, (722), 240 states have return successors, (1104), 696 states have call predecessors, (1104), 720 states have call successors, (1104) [2022-11-19 07:24:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5851 states to 5851 states and 9190 transitions. [2022-11-19 07:24:58,267 INFO L78 Accepts]: Start accepts. Automaton has 5851 states and 9190 transitions. Word has length 123 [2022-11-19 07:24:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:58,270 INFO L495 AbstractCegarLoop]: Abstraction has 5851 states and 9190 transitions. [2022-11-19 07:24:58,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:24:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5851 states and 9190 transitions. [2022-11-19 07:24:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:24:58,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:58,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:58,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:58,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:58,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:58,489 INFO L85 PathProgramCache]: Analyzing trace with hash -995865103, now seen corresponding path program 1 times [2022-11-19 07:24:58,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:58,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643927104] [2022-11-19 07:24:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:58,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:24:58,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643927104] [2022-11-19 07:24:58,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643927104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451797726] [2022-11-19 07:24:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:58,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:58,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:58,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:58,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:24:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:24:58,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:58,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451797726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:58,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:58,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:24:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219439705] [2022-11-19 07:24:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:58,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:58,979 INFO L87 Difference]: Start difference. First operand 5851 states and 9190 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:00,073 INFO L93 Difference]: Finished difference Result 17420 states and 28107 transitions. [2022-11-19 07:25:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:25:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 07:25:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:00,143 INFO L225 Difference]: With dead ends: 17420 [2022-11-19 07:25:00,143 INFO L226 Difference]: Without dead ends: 11575 [2022-11-19 07:25:00,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:00,171 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 216 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:00,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 434 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:25:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11575 states. [2022-11-19 07:25:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11575 to 11531. [2022-11-19 07:25:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11531 states, 9652 states have (on average 1.500621632822213) internal successors, (14484), 9702 states have internal predecessors, (14484), 1398 states have call successors, (1398), 481 states have call predecessors, (1398), 480 states have return successors, (2132), 1348 states have call predecessors, (2132), 1396 states have call successors, (2132) [2022-11-19 07:25:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11531 states to 11531 states and 18014 transitions. [2022-11-19 07:25:01,175 INFO L78 Accepts]: Start accepts. Automaton has 11531 states and 18014 transitions. Word has length 123 [2022-11-19 07:25:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:01,175 INFO L495 AbstractCegarLoop]: Abstraction has 11531 states and 18014 transitions. [2022-11-19 07:25:01,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11531 states and 18014 transitions. [2022-11-19 07:25:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:25:01,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:01,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:01,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:01,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:25:01,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1331589201, now seen corresponding path program 1 times [2022-11-19 07:25:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:01,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834030770] [2022-11-19 07:25:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:01,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:25:01,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:01,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834030770] [2022-11-19 07:25:01,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834030770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:01,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980534931] [2022-11-19 07:25:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:01,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:01,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:25:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:01,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:25:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:25:02,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980534931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:02,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:25:02,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:25:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809841761] [2022-11-19 07:25:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:25:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:25:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:02,048 INFO L87 Difference]: Start difference. First operand 11531 states and 18014 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:03,989 INFO L93 Difference]: Finished difference Result 34340 states and 55063 transitions. [2022-11-19 07:25:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:25:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 07:25:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:04,127 INFO L225 Difference]: With dead ends: 34340 [2022-11-19 07:25:04,127 INFO L226 Difference]: Without dead ends: 22815 [2022-11-19 07:25:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:04,186 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 222 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:04,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 434 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:25:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22815 states. [2022-11-19 07:25:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22815 to 22731. [2022-11-19 07:25:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22731 states, 19060 states have (on average 1.4944386149003148) internal successors, (28484), 19158 states have internal predecessors, (28484), 2710 states have call successors, (2710), 961 states have call predecessors, (2710), 960 states have return successors, (4116), 2612 states have call predecessors, (4116), 2708 states have call successors, (4116) [2022-11-19 07:25:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22731 states to 22731 states and 35310 transitions. [2022-11-19 07:25:06,305 INFO L78 Accepts]: Start accepts. Automaton has 22731 states and 35310 transitions. Word has length 123 [2022-11-19 07:25:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:06,306 INFO L495 AbstractCegarLoop]: Abstraction has 22731 states and 35310 transitions. [2022-11-19 07:25:06,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22731 states and 35310 transitions. [2022-11-19 07:25:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:25:06,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:06,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:06,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:06,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18bf6dcc-c7c3-47a3-9b6c-9095026691c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:25:06,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash -791852367, now seen corresponding path program 1 times [2022-11-19 07:25:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:06,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437477687] [2022-11-19 07:25:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:06,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:25:07,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:07,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437477687] [2022-11-19 07:25:07,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437477687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:07,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:07,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:25:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271129919] [2022-11-19 07:25:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:07,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:25:07,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:25:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:07,302 INFO L87 Difference]: Start difference. First operand 22731 states and 35310 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:25:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:10,570 INFO L93 Difference]: Finished difference Result 59379 states and 93428 transitions. [2022-11-19 07:25:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-19 07:25:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:10,730 INFO L225 Difference]: With dead ends: 59379 [2022-11-19 07:25:10,730 INFO L226 Difference]: Without dead ends: 36655 [2022-11-19 07:25:10,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:25:10,788 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 753 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:10,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 776 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:25:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36655 states. [2022-11-19 07:25:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36655 to 33771. [2022-11-19 07:25:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33771 states, 28308 states have (on average 1.4894729405115161) internal successors, (42164), 28454 states have internal predecessors, (42164), 4022 states have call successors, (4022), 1441 states have call predecessors, (4022), 1440 states have return successors, (6100), 3876 states have call predecessors, (6100), 4020 states have call successors, (6100) [2022-11-19 07:25:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33771 states to 33771 states and 52286 transitions. [2022-11-19 07:25:14,492 INFO L78 Accepts]: Start accepts. Automaton has 33771 states and 52286 transitions. Word has length 123 [2022-11-19 07:25:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:14,492 INFO L495 AbstractCegarLoop]: Abstraction has 33771 states and 52286 transitions. [2022-11-19 07:25:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:25:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33771 states and 52286 transitions. [2022-11-19 07:25:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:25:14,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:14,529 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:14,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:25:14,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1860619354, now seen corresponding path program 1 times [2022-11-19 07:25:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:14,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4688136] [2022-11-19 07:25:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:25:15,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4688136] [2022-11-19 07:25:15,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4688136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:15,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:15,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:25:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930462058] [2022-11-19 07:25:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:15,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:25:15,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:25:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:15,045 INFO L87 Difference]: Start difference. First operand 33771 states and 52286 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:25:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:19,857 INFO L93 Difference]: Finished difference Result 94259 states and 147348 transitions. [2022-11-19 07:25:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-19 07:25:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:20,160 INFO L225 Difference]: With dead ends: 94259 [2022-11-19 07:25:20,161 INFO L226 Difference]: Without dead ends: 60495 [2022-11-19 07:25:20,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:25:20,265 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 856 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:20,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 736 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:25:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2022-11-19 07:25:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 53451. [2022-11-19 07:25:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53451 states, 44772 states have (on average 1.4820870186723845) internal successors, (66356), 45014 states have internal predecessors, (66356), 6374 states have call successors, (6374), 2305 states have call predecessors, (6374), 2304 states have return successors, (9940), 6132 states have call predecessors, (9940), 6372 states have call successors, (9940) [2022-11-19 07:25:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53451 states to 53451 states and 82670 transitions. [2022-11-19 07:25:25,391 INFO L78 Accepts]: Start accepts. Automaton has 53451 states and 82670 transitions. Word has length 124 [2022-11-19 07:25:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:25,392 INFO L495 AbstractCegarLoop]: Abstraction has 53451 states and 82670 transitions. [2022-11-19 07:25:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:25:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 53451 states and 82670 transitions. [2022-11-19 07:25:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:25:25,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:25,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:25,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:25:25,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 601339477, now seen corresponding path program 1 times [2022-11-19 07:25:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:25,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727613091] [2022-11-19 07:25:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:25:25,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727613091] [2022-11-19 07:25:25,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727613091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:25,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:25,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:25:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613618049] [2022-11-19 07:25:25,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:25,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:25:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:25:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:25,965 INFO L87 Difference]: Start difference. First operand 53451 states and 82670 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:25:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:33,279 INFO L93 Difference]: Finished difference Result 144051 states and 225092 transitions. [2022-11-19 07:25:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-19 07:25:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:33,740 INFO L225 Difference]: With dead ends: 144051 [2022-11-19 07:25:33,740 INFO L226 Difference]: Without dead ends: 90607 [2022-11-19 07:25:33,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:25:33,916 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 843 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:33,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 664 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:25:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90607 states.