./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/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_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-2329fc7 [2022-12-14 08:49:19,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:49:19,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:49:19,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:49:19,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:49:19,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:49:19,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:49:19,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:49:19,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:49:19,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:49:19,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:49:19,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:49:19,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:49:19,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:49:19,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:49:19,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:49:19,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:49:19,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:49:19,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:49:19,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:49:19,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:49:19,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:49:19,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:49:19,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:49:19,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:49:19,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:49:19,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:49:19,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:49:19,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:49:19,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:49:19,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:49:19,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:49:19,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:49:19,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:49:19,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:49:19,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:49:19,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:49:19,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:49:19,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:49:19,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:49:19,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:49:19,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:49:19,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:49:19,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:49:19,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:49:19,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:49:19,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:49:19,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:49:19,532 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:49:19,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:49:19,537 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:49:19,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:49:19,538 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:49:19,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:49:19,538 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:49:19,538 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:49:19,539 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:49:19,539 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:49:19,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:49:19,539 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:49:19,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:49:19,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:49:19,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:49:19,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:49:19,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:49:19,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:49:19,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:49:19,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:49:19,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:49:19,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:49:19,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:49:19,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:49:19,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:49:19,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:49:19,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:49:19,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:49:19,543 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:49:19,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:49:19,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:49:19,544 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:49:19,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:49:19,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:49:19,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:49:19,545 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_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f [2022-12-14 08:49:19,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:49:19,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:49:19,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:49:19,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:49:19,732 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:49:19,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-12-14 08:49:22,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:49:22,518 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:49:22,519 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-12-14 08:49:22,532 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/data/ae26e9429/97d0ea551ebb400a8cd14ca9d5648d31/FLAG78976aaf1 [2022-12-14 08:49:22,896 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/data/ae26e9429/97d0ea551ebb400a8cd14ca9d5648d31 [2022-12-14 08:49:22,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:49:22,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:49:22,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:49:22,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:49:22,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:49:22,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:49:22" (1/1) ... [2022-12-14 08:49:22,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62cb1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:22, skipping insertion in model container [2022-12-14 08:49:22,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:49:22" (1/1) ... [2022-12-14 08:49:22,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:49:22,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:49:23,046 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-12-14 08:49:23,088 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-12-14 08:49:23,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:49:23,187 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:49:23,197 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-12-14 08:49:23,214 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-12-14 08:49:23,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:49:23,256 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:49:23,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23 WrapperNode [2022-12-14 08:49:23,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:49:23,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:49:23,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:49:23,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:49:23,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,305 INFO L138 Inliner]: procedures = 75, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 967 [2022-12-14 08:49:23,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:49:23,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:49:23,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:49:23,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:49:23,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:49:23,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:49:23,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:49:23,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:49:23,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (1/1) ... [2022-12-14 08:49:23,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:49:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:23,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:49:23,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:49:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:49:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:49:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:49:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 08:49:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 08:49:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 08:49:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 08:49:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 08:49:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 08:49:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 08:49:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 08:49:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 08:49:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 08:49:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 08:49:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 08:49:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 08:49:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 08:49:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 08:49:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 08:49:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 08:49:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 08:49:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 08:49:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 08:49:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:49:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 08:49:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 08:49:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 08:49:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 08:49:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:49:23,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:49:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 08:49:23,434 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 08:49:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 08:49:23,434 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 08:49:23,539 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:49:23,541 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:49:24,112 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 08:49:24,112 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; [2022-12-14 08:49:24,182 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:49:24,574 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:49:24,574 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-12-14 08:49:24,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:49:24 BoogieIcfgContainer [2022-12-14 08:49:24,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:49:24,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:49:24,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:49:24,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:49:24,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:49:22" (1/3) ... [2022-12-14 08:49:24,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6249064b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:49:24, skipping insertion in model container [2022-12-14 08:49:24,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:49:23" (2/3) ... [2022-12-14 08:49:24,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6249064b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:49:24, skipping insertion in model container [2022-12-14 08:49:24,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:49:24" (3/3) ... [2022-12-14 08:49:24,585 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-12-14 08:49:24,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:49:24,605 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:49:24,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:49:24,654 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;@672a9517, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:49:24,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:49:24,660 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) [2022-12-14 08:49:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:49:24,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:24,671 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] [2022-12-14 08:49:24,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1967140603, now seen corresponding path program 1 times [2022-12-14 08:49:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:24,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125571027] [2022-12-14 08:49:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:49:24,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125571027] [2022-12-14 08:49:24,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125571027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:24,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:24,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:49:24,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727970117] [2022-12-14 08:49:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:49:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:49:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:49:24,954 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) [2022-12-14 08:49:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:25,304 INFO L93 Difference]: Finished difference Result 624 states and 936 transitions. [2022-12-14 08:49:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:49:25,307 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 [2022-12-14 08:49:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:25,319 INFO L225 Difference]: With dead ends: 624 [2022-12-14 08:49:25,320 INFO L226 Difference]: Without dead ends: 374 [2022-12-14 08:49:25,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:49:25,327 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 429 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:25,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 662 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:49:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-14 08:49:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2022-12-14 08:49:25,403 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) [2022-12-14 08:49:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 518 transitions. [2022-12-14 08:49:25,406 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 518 transitions. Word has length 44 [2022-12-14 08:49:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:25,407 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 518 transitions. [2022-12-14 08:49:25,407 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) [2022-12-14 08:49:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 518 transitions. [2022-12-14 08:49:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:49:25,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:25,409 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] [2022-12-14 08:49:25,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:49:25,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1232665803, now seen corresponding path program 1 times [2022-12-14 08:49:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:25,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315393984] [2022-12-14 08:49:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:25,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:49:25,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315393984] [2022-12-14 08:49:25,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315393984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:25,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:25,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:49:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274155404] [2022-12-14 08:49:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:25,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:25,509 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) [2022-12-14 08:49:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:26,117 INFO L93 Difference]: Finished difference Result 900 states and 1241 transitions. [2022-12-14 08:49:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:49:26,117 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 [2022-12-14 08:49:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:26,121 INFO L225 Difference]: With dead ends: 900 [2022-12-14 08:49:26,121 INFO L226 Difference]: Without dead ends: 434 [2022-12-14 08:49:26,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:49:26,123 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 922 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:26,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1141 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:49:26,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-12-14 08:49:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 349. [2022-12-14 08:49:26,153 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) [2022-12-14 08:49:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 482 transitions. [2022-12-14 08:49:26,156 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 482 transitions. Word has length 45 [2022-12-14 08:49:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:26,156 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 482 transitions. [2022-12-14 08:49:26,156 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) [2022-12-14 08:49:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 482 transitions. [2022-12-14 08:49:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:49:26,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:26,158 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] [2022-12-14 08:49:26,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:49:26,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2082050943, now seen corresponding path program 1 times [2022-12-14 08:49:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:26,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323381113] [2022-12-14 08:49:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:49:26,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323381113] [2022-12-14 08:49:26,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323381113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:26,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:26,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 08:49:26,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053059878] [2022-12-14 08:49:26,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:26,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:49:26,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:26,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:49:26,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:49:26,353 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) [2022-12-14 08:49:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:26,986 INFO L93 Difference]: Finished difference Result 651 states and 850 transitions. [2022-12-14 08:49:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:49:26,986 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 [2022-12-14 08:49:26,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:26,990 INFO L225 Difference]: With dead ends: 651 [2022-12-14 08:49:26,990 INFO L226 Difference]: Without dead ends: 477 [2022-12-14 08:49:26,991 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 [2022-12-14 08:49:26,992 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 515 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:26,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1044 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:49:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-12-14 08:49:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 451. [2022-12-14 08:49:27,029 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) [2022-12-14 08:49:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 604 transitions. [2022-12-14 08:49:27,032 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 604 transitions. Word has length 46 [2022-12-14 08:49:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:27,032 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 604 transitions. [2022-12-14 08:49:27,033 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) [2022-12-14 08:49:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 604 transitions. [2022-12-14 08:49:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 08:49:27,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:27,034 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] [2022-12-14 08:49:27,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:49:27,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:27,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1767807650, now seen corresponding path program 1 times [2022-12-14 08:49:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390209266] [2022-12-14 08:49:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:49:27,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:27,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390209266] [2022-12-14 08:49:27,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390209266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:27,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:27,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:49:27,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68831935] [2022-12-14 08:49:27,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:49:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:49:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:49:27,076 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) [2022-12-14 08:49:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:27,174 INFO L93 Difference]: Finished difference Result 716 states and 940 transitions. [2022-12-14 08:49:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:49:27,175 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 [2022-12-14 08:49:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:27,177 INFO L225 Difference]: With dead ends: 716 [2022-12-14 08:49:27,177 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 08:49:27,179 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 [2022-12-14 08:49:27,181 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 [2022-12-14 08:49:27,181 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] [2022-12-14 08:49:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 08:49:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-12-14 08:49:27,202 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) [2022-12-14 08:49:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 259 transitions. [2022-12-14 08:49:27,203 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 259 transitions. Word has length 47 [2022-12-14 08:49:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:27,203 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 259 transitions. [2022-12-14 08:49:27,203 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) [2022-12-14 08:49:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 259 transitions. [2022-12-14 08:49:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 08:49:27,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:27,204 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] [2022-12-14 08:49:27,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:49:27,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1858160015, now seen corresponding path program 1 times [2022-12-14 08:49:27,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:27,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429240784] [2022-12-14 08:49:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:27,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:49:27,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429240784] [2022-12-14 08:49:27,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429240784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:27,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:27,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:49:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951061565] [2022-12-14 08:49:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:49:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:49:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:49:27,291 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) [2022-12-14 08:49:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:27,967 INFO L93 Difference]: Finished difference Result 948 states and 1540 transitions. [2022-12-14 08:49:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:49:27,967 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 [2022-12-14 08:49:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:27,971 INFO L225 Difference]: With dead ends: 948 [2022-12-14 08:49:27,971 INFO L226 Difference]: Without dead ends: 784 [2022-12-14 08:49:27,972 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 [2022-12-14 08:49:27,973 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 1149 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:27,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1186 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:49:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-12-14 08:49:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 771. [2022-12-14 08:49:28,009 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) [2022-12-14 08:49:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1227 transitions. [2022-12-14 08:49:28,013 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1227 transitions. Word has length 62 [2022-12-14 08:49:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:28,013 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1227 transitions. [2022-12-14 08:49:28,013 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) [2022-12-14 08:49:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1227 transitions. [2022-12-14 08:49:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:49:28,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:28,016 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] [2022-12-14 08:49:28,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:49:28,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash -768587721, now seen corresponding path program 1 times [2022-12-14 08:49:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:28,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816543882] [2022-12-14 08:49:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:49:28,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816543882] [2022-12-14 08:49:28,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816543882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017957951] [2022-12-14 08:49:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:28,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:28,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:28,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:28,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:49:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:49:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:49:28,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:49:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017957951] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:28,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:49:28,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:49:28,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56935246] [2022-12-14 08:49:28,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:28,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:49:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:49:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:28,367 INFO L87 Difference]: Start difference. First operand 771 states and 1227 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) [2022-12-14 08:49:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:28,587 INFO L93 Difference]: Finished difference Result 2285 states and 3745 transitions. [2022-12-14 08:49:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:49:28,587 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 [2022-12-14 08:49:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:28,601 INFO L225 Difference]: With dead ends: 2285 [2022-12-14 08:49:28,602 INFO L226 Difference]: Without dead ends: 1520 [2022-12-14 08:49:28,608 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 [2022-12-14 08:49:28,609 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 [2022-12-14 08:49:28,609 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] [2022-12-14 08:49:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-12-14 08:49:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1511. [2022-12-14 08:49:28,744 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) [2022-12-14 08:49:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2396 transitions. [2022-12-14 08:49:28,755 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2396 transitions. Word has length 123 [2022-12-14 08:49:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:28,756 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 2396 transitions. [2022-12-14 08:49:28,756 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) [2022-12-14 08:49:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2396 transitions. [2022-12-14 08:49:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:49:28,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:28,762 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] [2022-12-14 08:49:28,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:49:28,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:28,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash -303441257, now seen corresponding path program 1 times [2022-12-14 08:49:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861602386] [2022-12-14 08:49:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:28,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:49:29,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861602386] [2022-12-14 08:49:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861602386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:29,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611069048] [2022-12-14 08:49:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:29,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:29,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:29,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:29,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:49:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:49:29,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:49:29,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:49:29,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611069048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:29,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:49:29,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:49:29,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248863314] [2022-12-14 08:49:29,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:29,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:49:29,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:49:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:29,258 INFO L87 Difference]: Start difference. First operand 1511 states and 2396 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) [2022-12-14 08:49:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:29,497 INFO L93 Difference]: Finished difference Result 4490 states and 7326 transitions. [2022-12-14 08:49:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:49:29,498 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 [2022-12-14 08:49:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:29,509 INFO L225 Difference]: With dead ends: 4490 [2022-12-14 08:49:29,509 INFO L226 Difference]: Without dead ends: 2985 [2022-12-14 08:49:29,515 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 [2022-12-14 08:49:29,516 INFO L413 NwaCegarLoop]: 231 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, 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 [2022-12-14 08:49:29,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 434 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:49:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2985 states. [2022-12-14 08:49:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2985 to 2971. [2022-12-14 08:49:29,653 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) [2022-12-14 08:49:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4690 transitions. [2022-12-14 08:49:29,663 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4690 transitions. Word has length 123 [2022-12-14 08:49:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:29,663 INFO L495 AbstractCegarLoop]: Abstraction has 2971 states and 4690 transitions. [2022-12-14 08:49:29,663 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) [2022-12-14 08:49:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4690 transitions. [2022-12-14 08:49:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:49:29,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:29,678 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] [2022-12-14 08:49:29,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:49:29,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:49:29,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1310370871, now seen corresponding path program 1 times [2022-12-14 08:49:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:29,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762918047] [2022-12-14 08:49:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:49:30,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:30,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762918047] [2022-12-14 08:49:30,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762918047] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:30,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200778366] [2022-12-14 08:49:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:30,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:30,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:30,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:30,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:49:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:30,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:49:30,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:49:30,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:49:30,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200778366] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:30,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:49:30,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:49:30,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777460380] [2022-12-14 08:49:30,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:30,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:49:30,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:49:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:30,212 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) [2022-12-14 08:49:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:30,631 INFO L93 Difference]: Finished difference Result 8840 states and 14347 transitions. [2022-12-14 08:49:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:49:30,632 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 [2022-12-14 08:49:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:30,652 INFO L225 Difference]: With dead ends: 8840 [2022-12-14 08:49:30,652 INFO L226 Difference]: Without dead ends: 5875 [2022-12-14 08:49:30,668 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 [2022-12-14 08:49:30,668 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 [2022-12-14 08:49:30,669 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] [2022-12-14 08:49:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2022-12-14 08:49:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5851. [2022-12-14 08:49:31,049 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) [2022-12-14 08:49:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5851 states to 5851 states and 9190 transitions. [2022-12-14 08:49:31,072 INFO L78 Accepts]: Start accepts. Automaton has 5851 states and 9190 transitions. Word has length 123 [2022-12-14 08:49:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:31,073 INFO L495 AbstractCegarLoop]: Abstraction has 5851 states and 9190 transitions. [2022-12-14 08:49:31,073 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) [2022-12-14 08:49:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5851 states and 9190 transitions. [2022-12-14 08:49:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:49:31,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:31,081 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] [2022-12-14 08:49:31,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:49:31,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 08:49:31,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1849038487, now seen corresponding path program 1 times [2022-12-14 08:49:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:31,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529412029] [2022-12-14 08:49:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:49:31,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529412029] [2022-12-14 08:49:31,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529412029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74675044] [2022-12-14 08:49:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:31,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:31,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:31,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:31,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:49:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:49:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:49:31,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:49:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74675044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:31,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:49:31,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:49:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194358402] [2022-12-14 08:49:31,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:31,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:49:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:49:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:31,645 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) [2022-12-14 08:49:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:32,265 INFO L93 Difference]: Finished difference Result 17420 states and 28107 transitions. [2022-12-14 08:49:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:49:32,265 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 [2022-12-14 08:49:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:32,360 INFO L225 Difference]: With dead ends: 17420 [2022-12-14 08:49:32,360 INFO L226 Difference]: Without dead ends: 11575 [2022-12-14 08:49:32,381 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 [2022-12-14 08:49:32,382 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 [2022-12-14 08:49:32,382 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] [2022-12-14 08:49:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11575 states. [2022-12-14 08:49:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11575 to 11531. [2022-12-14 08:49:32,991 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) [2022-12-14 08:49:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11531 states to 11531 states and 18014 transitions. [2022-12-14 08:49:33,020 INFO L78 Accepts]: Start accepts. Automaton has 11531 states and 18014 transitions. Word has length 123 [2022-12-14 08:49:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:33,020 INFO L495 AbstractCegarLoop]: Abstraction has 11531 states and 18014 transitions. [2022-12-14 08:49:33,020 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) [2022-12-14 08:49:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 11531 states and 18014 transitions. [2022-12-14 08:49:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:49:33,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:33,031 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] [2022-12-14 08:49:33,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:49:33,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 08:49:33,232 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash -118474505, now seen corresponding path program 1 times [2022-12-14 08:49:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794549793] [2022-12-14 08:49:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:33,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:49:33,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794549793] [2022-12-14 08:49:33,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794549793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:33,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964162671] [2022-12-14 08:49:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:33,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:33,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:33,326 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:33,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:49:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:49:33,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:49:33,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:49:33,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964162671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:33,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:49:33,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:49:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216307545] [2022-12-14 08:49:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:49:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:49:33,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:33,571 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) [2022-12-14 08:49:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:34,861 INFO L93 Difference]: Finished difference Result 34340 states and 55063 transitions. [2022-12-14 08:49:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:49:34,861 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 [2022-12-14 08:49:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:34,929 INFO L225 Difference]: With dead ends: 34340 [2022-12-14 08:49:34,929 INFO L226 Difference]: Without dead ends: 22815 [2022-12-14 08:49:34,960 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 [2022-12-14 08:49:34,961 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 [2022-12-14 08:49:34,961 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] [2022-12-14 08:49:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22815 states. [2022-12-14 08:49:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22815 to 22731. [2022-12-14 08:49:36,139 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) [2022-12-14 08:49:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22731 states to 22731 states and 35310 transitions. [2022-12-14 08:49:36,249 INFO L78 Accepts]: Start accepts. Automaton has 22731 states and 35310 transitions. Word has length 123 [2022-12-14 08:49:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:36,249 INFO L495 AbstractCegarLoop]: Abstraction has 22731 states and 35310 transitions. [2022-12-14 08:49:36,250 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) [2022-12-14 08:49:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22731 states and 35310 transitions. [2022-12-14 08:49:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:49:36,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:36,274 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] [2022-12-14 08:49:36,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:49:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abee7a9-0dc9-4418-a3a6-f4a3e090133e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:49:36,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2053051223, now seen corresponding path program 1 times [2022-12-14 08:49:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357723112] [2022-12-14 08:49:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:49:36,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:36,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357723112] [2022-12-14 08:49:36,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357723112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:36,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:36,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:49:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926094562] [2022-12-14 08:49:36,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:36,932 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) [2022-12-14 08:49:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:38,978 INFO L93 Difference]: Finished difference Result 59379 states and 93428 transitions. [2022-12-14 08:49:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:49:38,979 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 [2022-12-14 08:49:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:39,079 INFO L225 Difference]: With dead ends: 59379 [2022-12-14 08:49:39,079 INFO L226 Difference]: Without dead ends: 36655 [2022-12-14 08:49:39,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:49:39,121 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 751 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:39,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 776 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:49:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36655 states. [2022-12-14 08:49:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36655 to 33771. [2022-12-14 08:49:41,223 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) [2022-12-14 08:49:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33771 states to 33771 states and 52286 transitions. [2022-12-14 08:49:41,306 INFO L78 Accepts]: Start accepts. Automaton has 33771 states and 52286 transitions. Word has length 123 [2022-12-14 08:49:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:41,307 INFO L495 AbstractCegarLoop]: Abstraction has 33771 states and 52286 transitions. [2022-12-14 08:49:41,307 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) [2022-12-14 08:49:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 33771 states and 52286 transitions. [2022-12-14 08:49:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 08:49:41,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:41,328 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] [2022-12-14 08:49:41,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:49:41,328 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash -141682572, now seen corresponding path program 1 times [2022-12-14 08:49:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:41,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698659764] [2022-12-14 08:49:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:49:41,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698659764] [2022-12-14 08:49:41,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698659764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:41,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:41,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:49:41,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613823142] [2022-12-14 08:49:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:41,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:41,681 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) [2022-12-14 08:49:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:45,595 INFO L93 Difference]: Finished difference Result 94259 states and 147348 transitions. [2022-12-14 08:49:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:49:45,596 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 [2022-12-14 08:49:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:45,822 INFO L225 Difference]: With dead ends: 94259 [2022-12-14 08:49:45,822 INFO L226 Difference]: Without dead ends: 60495 [2022-12-14 08:49:45,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:49:45,906 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 854 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:45,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 736 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:49:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2022-12-14 08:49:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 53451. [2022-12-14 08:49:48,792 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) [2022-12-14 08:49:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53451 states to 53451 states and 82670 transitions. [2022-12-14 08:49:48,945 INFO L78 Accepts]: Start accepts. Automaton has 53451 states and 82670 transitions. Word has length 124 [2022-12-14 08:49:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:48,945 INFO L495 AbstractCegarLoop]: Abstraction has 53451 states and 82670 transitions. [2022-12-14 08:49:48,945 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) [2022-12-14 08:49:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 53451 states and 82670 transitions. [2022-12-14 08:49:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 08:49:48,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:48,977 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] [2022-12-14 08:49:48,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:49:48,977 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1340478085, now seen corresponding path program 1 times [2022-12-14 08:49:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:48,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218193506] [2022-12-14 08:49:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:48,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:49:49,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:49,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218193506] [2022-12-14 08:49:49,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218193506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:49,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:49,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:49:49,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057946569] [2022-12-14 08:49:49,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:49,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:49,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:49,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:49,371 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) [2022-12-14 08:49:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:55,400 INFO L93 Difference]: Finished difference Result 144051 states and 225092 transitions. [2022-12-14 08:49:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:49:55,401 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 [2022-12-14 08:49:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:55,718 INFO L225 Difference]: With dead ends: 144051 [2022-12-14 08:49:55,718 INFO L226 Difference]: Without dead ends: 90607 [2022-12-14 08:49:55,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:49:55,854 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 841 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:55,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 664 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:49:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90607 states. [2022-12-14 08:50:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90607 to 79403. [2022-12-14 08:50:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79403 states, 66484 states have (on average 1.4768666145237952) internal successors, (98188), 66846 states have internal predecessors, (98188), 9462 states have call successors, (9462), 3457 states have call predecessors, (9462), 3456 states have return successors, (14728), 9100 states have call predecessors, (14728), 9460 states have call successors, (14728) [2022-12-14 08:50:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79403 states to 79403 states and 122378 transitions. [2022-12-14 08:50:01,583 INFO L78 Accepts]: Start accepts. Automaton has 79403 states and 122378 transitions. Word has length 125 [2022-12-14 08:50:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:50:01,584 INFO L495 AbstractCegarLoop]: Abstraction has 79403 states and 122378 transitions. [2022-12-14 08:50:01,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 79403 states and 122378 transitions. [2022-12-14 08:50:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 08:50:01,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:50:01,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:50:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 08:50:01,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:50:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:50:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1984988716, now seen corresponding path program 1 times [2022-12-14 08:50:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:50:01,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492200438] [2022-12-14 08:50:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:50:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:50:01,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:50:01,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492200438] [2022-12-14 08:50:01,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492200438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:50:01,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:50:01,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:50:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074241508] [2022-12-14 08:50:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:50:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:50:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:50:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:50:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:50:01,884 INFO L87 Difference]: Start difference. First operand 79403 states and 122378 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:50:10,838 INFO L93 Difference]: Finished difference Result 212131 states and 330896 transitions. [2022-12-14 08:50:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:50:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (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 126 [2022-12-14 08:50:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:50:11,244 INFO L225 Difference]: With dead ends: 212131 [2022-12-14 08:50:11,245 INFO L226 Difference]: Without dead ends: 132735 [2022-12-14 08:50:11,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:50:11,398 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 818 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:50:11,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 654 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:50:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132735 states. [2022-12-14 08:50:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132735 to 117947. [2022-12-14 08:50:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117947 states, 98716 states have (on average 1.471534503018761) internal successors, (145264), 99258 states have internal predecessors, (145264), 14046 states have call successors, (14046), 5185 states have call predecessors, (14046), 5184 states have return successors, (21820), 13504 states have call predecessors, (21820), 14044 states have call successors, (21820) [2022-12-14 08:50:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117947 states to 117947 states and 181130 transitions. [2022-12-14 08:50:19,351 INFO L78 Accepts]: Start accepts. Automaton has 117947 states and 181130 transitions. Word has length 126 [2022-12-14 08:50:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:50:19,352 INFO L495 AbstractCegarLoop]: Abstraction has 117947 states and 181130 transitions. [2022-12-14 08:50:19,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 117947 states and 181130 transitions. [2022-12-14 08:50:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 08:50:19,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:50:19,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:50:19,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 08:50:19,413 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:50:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:50:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1845850647, now seen corresponding path program 1 times [2022-12-14 08:50:19,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:50:19,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752524538] [2022-12-14 08:50:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:50:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:50:19,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:50:19,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752524538] [2022-12-14 08:50:19,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752524538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:50:19,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:50:19,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:50:19,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801163772] [2022-12-14 08:50:19,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:50:19,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:50:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:50:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:50:19,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:50:19,701 INFO L87 Difference]: Start difference. First operand 117947 states and 181130 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:50:38,521 INFO L93 Difference]: Finished difference Result 386083 states and 602985 transitions. [2022-12-14 08:50:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:50:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 127 [2022-12-14 08:50:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:50:39,581 INFO L225 Difference]: With dead ends: 386083 [2022-12-14 08:50:39,581 INFO L226 Difference]: Without dead ends: 268143 [2022-12-14 08:50:40,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:50:40,021 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 820 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:50:40,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 696 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:50:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268143 states. [2022-12-14 08:50:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268143 to 230699. [2022-12-14 08:50:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230699 states, 193108 states have (on average 1.4641962010895457) internal successors, (282748), 194190 states have internal predecessors, (282748), 27222 states have call successors, (27222), 10369 states have call predecessors, (27222), 10368 states have return successors, (42016), 26140 states have call predecessors, (42016), 27220 states have call successors, (42016) [2022-12-14 08:50:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230699 states to 230699 states and 351986 transitions. [2022-12-14 08:50:59,031 INFO L78 Accepts]: Start accepts. Automaton has 230699 states and 351986 transitions. Word has length 127 [2022-12-14 08:50:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:50:59,031 INFO L495 AbstractCegarLoop]: Abstraction has 230699 states and 351986 transitions. [2022-12-14 08:50:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 230699 states and 351986 transitions. [2022-12-14 08:50:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 08:50:59,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:50:59,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:50:59,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:50:59,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:50:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:50:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1382979272, now seen corresponding path program 1 times [2022-12-14 08:50:59,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:50:59,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368666871] [2022-12-14 08:50:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:59,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:50:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:50:59,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:50:59,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368666871] [2022-12-14 08:50:59,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368666871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:50:59,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:50:59,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:50:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514377090] [2022-12-14 08:50:59,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:50:59,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:50:59,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:50:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:50:59,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:50:59,489 INFO L87 Difference]: Start difference. First operand 230699 states and 351986 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:51:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:39,536 INFO L93 Difference]: Finished difference Result 730099 states and 1135533 transitions. [2022-12-14 08:51:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:51:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 128 [2022-12-14 08:51:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:41,640 INFO L225 Difference]: With dead ends: 730099 [2022-12-14 08:51:41,640 INFO L226 Difference]: Without dead ends: 499407 [2022-12-14 08:51:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:51:42,286 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 769 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 677 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499407 states. [2022-12-14 08:52:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499407 to 451019. [2022-12-14 08:52:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451019 states, 377572 states have (on average 1.4565169027364318) internal successors, (549940), 379734 states have internal predecessors, (549940), 52710 states have call successors, (52710), 20737 states have call predecessors, (52710), 20736 states have return successors, (80788), 50548 states have call predecessors, (80788), 52708 states have call successors, (80788) [2022-12-14 08:52:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451019 states to 451019 states and 683438 transitions. [2022-12-14 08:52:21,407 INFO L78 Accepts]: Start accepts. Automaton has 451019 states and 683438 transitions. Word has length 128 [2022-12-14 08:52:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:21,407 INFO L495 AbstractCegarLoop]: Abstraction has 451019 states and 683438 transitions. [2022-12-14 08:52:21,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:52:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 451019 states and 683438 transitions. [2022-12-14 08:52:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 08:52:21,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:21,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 08:52:21,668 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 535860783, now seen corresponding path program 1 times [2022-12-14 08:52:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:21,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334870959] [2022-12-14 08:52:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:52:21,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334870959] [2022-12-14 08:52:21,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334870959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:21,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:21,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:52:21,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480367280] [2022-12-14 08:52:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:21,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:52:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:52:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:52:21,859 INFO L87 Difference]: Start difference. First operand 451019 states and 683438 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:53:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:36,162 INFO L93 Difference]: Finished difference Result 1332307 states and 2012708 transitions. [2022-12-14 08:53:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:53:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 129 [2022-12-14 08:53:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:40,038 INFO L225 Difference]: With dead ends: 1332307 [2022-12-14 08:53:40,039 INFO L226 Difference]: Without dead ends: 881295 [2022-12-14 08:53:41,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:53:41,649 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 698 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:41,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 654 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:53:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881295 states. [2022-12-14 08:54:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881295 to 881291. [2022-12-14 08:54:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881291 states, 737860 states have (on average 1.4484753205215082) internal successors, (1068772), 742182 states have internal predecessors, (1068772), 101958 states have call successors, (101958), 41473 states have call predecessors, (101958), 41472 states have return successors, (155092), 97636 states have call predecessors, (155092), 101956 states have call successors, (155092) [2022-12-14 08:55:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881291 states to 881291 states and 1325822 transitions. [2022-12-14 08:55:02,387 INFO L78 Accepts]: Start accepts. Automaton has 881291 states and 1325822 transitions. Word has length 129 [2022-12-14 08:55:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:02,387 INFO L495 AbstractCegarLoop]: Abstraction has 881291 states and 1325822 transitions. [2022-12-14 08:55:02,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:55:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 881291 states and 1325822 transitions. [2022-12-14 08:55:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 08:55:03,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:03,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:03,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 08:55:03,324 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1777092092, now seen corresponding path program 1 times [2022-12-14 08:55:03,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:03,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009128178] [2022-12-14 08:55:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:03,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:55:03,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009128178] [2022-12-14 08:55:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009128178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:03,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:55:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522845320] [2022-12-14 08:55:03,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:55:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:55:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:55:03,651 INFO L87 Difference]: Start difference. First operand 881291 states and 1325822 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:57:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:13,019 INFO L93 Difference]: Finished difference Result 2261971 states and 3454724 transitions. [2022-12-14 08:57:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:57:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 130 [2022-12-14 08:57:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted.