./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu2.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/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_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu2.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/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_d60449fd-aa0b-4b38-b645-1bd61b058bc3/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 87760fc84dfa44e1b5109b35af0fae7e5f68f814afbb1ba90e7b46e4e9e3b4bf --- 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 07:29:07,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:29:07,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:29:07,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:29:07,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:29:07,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:29:07,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:29:07,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:29:07,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:29:07,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:29:07,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:29:07,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:29:07,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:29:07,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:29:07,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:29:07,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:29:07,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:29:07,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:29:07,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:29:07,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:29:07,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:29:07,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:29:07,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:29:07,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:29:07,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:29:07,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:29:07,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:29:07,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:29:07,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:29:07,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:29:07,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:29:07,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:29:07,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:29:07,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:29:07,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:29:07,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:29:07,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:29:07,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:29:07,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:29:07,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:29:07,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:29:07,276 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:29:07,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:29:07,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:29:07,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:29:07,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:29:07,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:29:07,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:29:07,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:29:07,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:29:07,292 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:29:07,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:29:07,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:29:07,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:29:07,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:29:07,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:29:07,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:29:07,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:29:07,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:29:07,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:29:07,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:29:07,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:29:07,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:29:07,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:29:07,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:29:07,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:29:07,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:29:07,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:29:07,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:29:07,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:29:07,295 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:29:07,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:29:07,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:29:07,295 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:29:07,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:29:07,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:29:07,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:29:07,296 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_d60449fd-aa0b-4b38-b645-1bd61b058bc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87760fc84dfa44e1b5109b35af0fae7e5f68f814afbb1ba90e7b46e4e9e3b4bf [2022-12-14 07:29:07,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:29:07,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:29:07,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:29:07,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:29:07,495 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:29:07,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/kundu2.cil.c [2022-12-14 07:29:10,093 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:29:10,251 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:29:10,252 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/sv-benchmarks/c/systemc/kundu2.cil.c [2022-12-14 07:29:10,260 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/data/a828a3d28/d8cb3aae375a4d1a9ff7df39924ea69c/FLAG515178961 [2022-12-14 07:29:10,274 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/data/a828a3d28/d8cb3aae375a4d1a9ff7df39924ea69c [2022-12-14 07:29:10,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:29:10,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:29:10,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:29:10,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:29:10,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:29:10,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458ca581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10, skipping insertion in model container [2022-12-14 07:29:10,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:29:10,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:29:10,431 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_d60449fd-aa0b-4b38-b645-1bd61b058bc3/sv-benchmarks/c/systemc/kundu2.cil.c[636,649] [2022-12-14 07:29:10,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:29:10,495 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:29:10,506 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_d60449fd-aa0b-4b38-b645-1bd61b058bc3/sv-benchmarks/c/systemc/kundu2.cil.c[636,649] [2022-12-14 07:29:10,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:29:10,548 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:29:10,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10 WrapperNode [2022-12-14 07:29:10,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:29:10,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:29:10,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:29:10,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:29:10,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,590 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 310 [2022-12-14 07:29:10,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:29:10,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:29:10,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:29:10,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:29:10,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,616 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:29:10,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:29:10,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:29:10,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:29:10,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (1/1) ... [2022-12-14 07:29:10,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:29:10,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:10,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:29:10,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:29:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:29:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-12-14 07:29:10,687 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-12-14 07:29:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 07:29:10,687 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 07:29:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 07:29:10,687 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 07:29:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 07:29:10,688 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 07:29:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 07:29:10,688 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 07:29:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 07:29:10,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 07:29:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:29:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 07:29:10,689 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 07:29:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:29:10,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:29:10,760 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:29:10,762 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:29:11,042 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:29:11,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:29:11,129 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 07:29:11,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:29:11 BoogieIcfgContainer [2022-12-14 07:29:11,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:29:11,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:29:11,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:29:11,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:29:11,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:29:10" (1/3) ... [2022-12-14 07:29:11,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d87e8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:29:11, skipping insertion in model container [2022-12-14 07:29:11,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:29:10" (2/3) ... [2022-12-14 07:29:11,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d87e8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:29:11, skipping insertion in model container [2022-12-14 07:29:11,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:29:11" (3/3) ... [2022-12-14 07:29:11,138 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2022-12-14 07:29:11,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:29:11,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:29:11,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:29:11,207 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;@5078f5ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:29:11,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:29:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 07:29:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:29:11,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:11,219 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] [2022-12-14 07:29:11,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1375347618, now seen corresponding path program 1 times [2022-12-14 07:29:11,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502592845] [2022-12-14 07:29:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:11,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:11,428 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 07:29:11,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502592845] [2022-12-14 07:29:11,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502592845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:11,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:11,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:29:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116663083] [2022-12-14 07:29:11,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:29:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:29:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:29:11,463 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:29:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:11,664 INFO L93 Difference]: Finished difference Result 263 states and 388 transitions. [2022-12-14 07:29:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:29:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-12-14 07:29:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:11,675 INFO L225 Difference]: With dead ends: 263 [2022-12-14 07:29:11,675 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 07:29:11,679 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 07:29:11,682 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 226 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:11,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 348 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:29:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 07:29:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-12-14 07:29:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4390243902439024) internal successors, (177), 127 states have internal predecessors, (177), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-14 07:29:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 232 transitions. [2022-12-14 07:29:11,727 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 232 transitions. Word has length 39 [2022-12-14 07:29:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:11,727 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 232 transitions. [2022-12-14 07:29:11,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:29:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 232 transitions. [2022-12-14 07:29:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:29:11,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:11,730 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] [2022-12-14 07:29:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:29:11,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash 403672931, now seen corresponding path program 1 times [2022-12-14 07:29:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:11,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322425078] [2022-12-14 07:29:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:11,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:11,814 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 07:29:11,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:11,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322425078] [2022-12-14 07:29:11,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322425078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:11,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:11,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:29:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910359216] [2022-12-14 07:29:11,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:11,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:29:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:29:11,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:29:11,818 INFO L87 Difference]: Start difference. First operand 165 states and 232 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:29:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:11,998 INFO L93 Difference]: Finished difference Result 480 states and 677 transitions. [2022-12-14 07:29:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:29:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-12-14 07:29:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:12,002 INFO L225 Difference]: With dead ends: 480 [2022-12-14 07:29:12,002 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 07:29:12,003 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 07:29:12,005 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 221 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:12,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 320 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:29:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 07:29:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 301. [2022-12-14 07:29:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 225 states have (on average 1.3911111111111112) internal successors, (313), 230 states have internal predecessors, (313), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 07:29:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 412 transitions. [2022-12-14 07:29:12,042 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 412 transitions. Word has length 39 [2022-12-14 07:29:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:12,042 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 412 transitions. [2022-12-14 07:29:12,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:29:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 412 transitions. [2022-12-14 07:29:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 07:29:12,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:12,043 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] [2022-12-14 07:29:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:29:12,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -445154152, now seen corresponding path program 1 times [2022-12-14 07:29:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635027798] [2022-12-14 07:29:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:12,147 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 07:29:12,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635027798] [2022-12-14 07:29:12,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635027798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:12,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:12,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:29:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839552856] [2022-12-14 07:29:12,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:12,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:29:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:29:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:29:12,150 INFO L87 Difference]: Start difference. First operand 301 states and 412 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 07:29:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:12,283 INFO L93 Difference]: Finished difference Result 801 states and 1098 transitions. [2022-12-14 07:29:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:29:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2022-12-14 07:29:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:12,286 INFO L225 Difference]: With dead ends: 801 [2022-12-14 07:29:12,286 INFO L226 Difference]: Without dead ends: 506 [2022-12-14 07:29:12,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:29:12,288 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 90 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 433 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:29:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-12-14 07:29:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 491. [2022-12-14 07:29:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 367 states have (on average 1.3814713896457766) internal successors, (507), 378 states have internal predecessors, (507), 81 states have call successors, (81), 43 states have call predecessors, (81), 42 states have return successors, (78), 70 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 07:29:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 666 transitions. [2022-12-14 07:29:12,321 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 666 transitions. Word has length 40 [2022-12-14 07:29:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:12,322 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 666 transitions. [2022-12-14 07:29:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 07:29:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 666 transitions. [2022-12-14 07:29:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 07:29:12,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:12,323 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-12-14 07:29:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:29:12,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1683754155, now seen corresponding path program 1 times [2022-12-14 07:29:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:12,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001368860] [2022-12-14 07:29:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:12,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001368860] [2022-12-14 07:29:12,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001368860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:12,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:12,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:29:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714272728] [2022-12-14 07:29:12,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:29:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:29:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:12,434 INFO L87 Difference]: Start difference. First operand 491 states and 666 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:29:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:12,706 INFO L93 Difference]: Finished difference Result 1355 states and 1854 transitions. [2022-12-14 07:29:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:29:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2022-12-14 07:29:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:12,710 INFO L225 Difference]: With dead ends: 1355 [2022-12-14 07:29:12,710 INFO L226 Difference]: Without dead ends: 931 [2022-12-14 07:29:12,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:29:12,713 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 197 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:12,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 766 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:29:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-12-14 07:29:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 905. [2022-12-14 07:29:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 682 states have (on average 1.3768328445747802) internal successors, (939), 700 states have internal predecessors, (939), 144 states have call successors, (144), 79 states have call predecessors, (144), 78 states have return successors, (141), 126 states have call predecessors, (141), 141 states have call successors, (141) [2022-12-14 07:29:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1224 transitions. [2022-12-14 07:29:12,762 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1224 transitions. Word has length 50 [2022-12-14 07:29:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:12,762 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1224 transitions. [2022-12-14 07:29:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:29:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1224 transitions. [2022-12-14 07:29:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 07:29:12,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:12,764 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] [2022-12-14 07:29:12,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:29:12,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1600510656, now seen corresponding path program 1 times [2022-12-14 07:29:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057092843] [2022-12-14 07:29:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:12,884 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 07:29:12,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:12,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057092843] [2022-12-14 07:29:12,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057092843] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:12,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:12,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:29:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340989844] [2022-12-14 07:29:12,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:12,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:29:12,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:29:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:12,887 INFO L87 Difference]: Start difference. First operand 905 states and 1224 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 07:29:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:13,166 INFO L93 Difference]: Finished difference Result 2804 states and 3798 transitions. [2022-12-14 07:29:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:29:13,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-12-14 07:29:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:13,173 INFO L225 Difference]: With dead ends: 2804 [2022-12-14 07:29:13,173 INFO L226 Difference]: Without dead ends: 1905 [2022-12-14 07:29:13,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:29:13,177 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 343 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:13,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 257 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:29:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-12-14 07:29:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1677. [2022-12-14 07:29:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1271 states have (on average 1.3634933123524784) internal successors, (1733), 1292 states have internal predecessors, (1733), 255 states have call successors, (255), 151 states have call predecessors, (255), 150 states have return successors, (252), 234 states have call predecessors, (252), 252 states have call successors, (252) [2022-12-14 07:29:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2240 transitions. [2022-12-14 07:29:13,285 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2240 transitions. Word has length 54 [2022-12-14 07:29:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:13,286 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2240 transitions. [2022-12-14 07:29:13,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 07:29:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2240 transitions. [2022-12-14 07:29:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 07:29:13,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:13,287 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] [2022-12-14 07:29:13,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:29:13,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1348050227, now seen corresponding path program 1 times [2022-12-14 07:29:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314734632] [2022-12-14 07:29:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:13,356 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 07:29:13,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314734632] [2022-12-14 07:29:13,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314734632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:13,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:13,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:29:13,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183898383] [2022-12-14 07:29:13,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:13,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:29:13,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:29:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:13,358 INFO L87 Difference]: Start difference. First operand 1677 states and 2240 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:29:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:13,706 INFO L93 Difference]: Finished difference Result 3769 states and 5161 transitions. [2022-12-14 07:29:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:29:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-12-14 07:29:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:13,719 INFO L225 Difference]: With dead ends: 3769 [2022-12-14 07:29:13,720 INFO L226 Difference]: Without dead ends: 2707 [2022-12-14 07:29:13,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:29:13,722 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 344 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:13,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 766 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:29:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2022-12-14 07:29:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2177. [2022-12-14 07:29:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1657 states have (on average 1.368135184067592) internal successors, (2267), 1679 states have internal predecessors, (2267), 326 states have call successors, (326), 194 states have call predecessors, (326), 193 states have return successors, (323), 304 states have call predecessors, (323), 323 states have call successors, (323) [2022-12-14 07:29:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 2916 transitions. [2022-12-14 07:29:13,825 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 2916 transitions. Word has length 55 [2022-12-14 07:29:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:13,825 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 2916 transitions. [2022-12-14 07:29:13,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:29:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 2916 transitions. [2022-12-14 07:29:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:29:13,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:13,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:13,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:29:13,827 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:13,827 INFO L85 PathProgramCache]: Analyzing trace with hash 669323404, now seen corresponding path program 1 times [2022-12-14 07:29:13,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:13,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419978644] [2022-12-14 07:29:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:13,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:29:13,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419978644] [2022-12-14 07:29:13,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419978644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:13,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:13,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:29:13,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790815136] [2022-12-14 07:29:13,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:13,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:13,859 INFO L87 Difference]: Start difference. First operand 2177 states and 2916 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 07:29:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:14,045 INFO L93 Difference]: Finished difference Result 5782 states and 7763 transitions. [2022-12-14 07:29:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-12-14 07:29:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:14,056 INFO L225 Difference]: With dead ends: 5782 [2022-12-14 07:29:14,056 INFO L226 Difference]: Without dead ends: 3611 [2022-12-14 07:29:14,059 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 07:29:14,060 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 64 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:14,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 270 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2022-12-14 07:29:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2829. [2022-12-14 07:29:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2176 states have (on average 1.3814338235294117) internal successors, (3006), 2218 states have internal predecessors, (3006), 400 states have call successors, (400), 253 states have call predecessors, (400), 252 states have return successors, (397), 358 states have call predecessors, (397), 397 states have call successors, (397) [2022-12-14 07:29:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 3803 transitions. [2022-12-14 07:29:14,217 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 3803 transitions. Word has length 57 [2022-12-14 07:29:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:14,217 INFO L495 AbstractCegarLoop]: Abstraction has 2829 states and 3803 transitions. [2022-12-14 07:29:14,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 07:29:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 3803 transitions. [2022-12-14 07:29:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 07:29:14,219 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:14,219 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:29:14,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1520398243, now seen corresponding path program 1 times [2022-12-14 07:29:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903190789] [2022-12-14 07:29:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:29:14,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903190789] [2022-12-14 07:29:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903190789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:14,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:14,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:29:14,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355507505] [2022-12-14 07:29:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:14,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:29:14,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:29:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:29:14,280 INFO L87 Difference]: Start difference. First operand 2829 states and 3803 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 07:29:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:14,639 INFO L93 Difference]: Finished difference Result 5565 states and 7531 transitions. [2022-12-14 07:29:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:29:14,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 63 [2022-12-14 07:29:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:14,648 INFO L225 Difference]: With dead ends: 5565 [2022-12-14 07:29:14,648 INFO L226 Difference]: Without dead ends: 3558 [2022-12-14 07:29:14,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:29:14,652 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 319 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:14,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 387 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:29:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-12-14 07:29:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3493. [2022-12-14 07:29:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 2702 states have (on average 1.382679496669134) internal successors, (3736), 2746 states have internal predecessors, (3736), 484 states have call successors, (484), 307 states have call predecessors, (484), 306 states have return successors, (481), 440 states have call predecessors, (481), 481 states have call successors, (481) [2022-12-14 07:29:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 4701 transitions. [2022-12-14 07:29:14,840 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 4701 transitions. Word has length 63 [2022-12-14 07:29:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:14,841 INFO L495 AbstractCegarLoop]: Abstraction has 3493 states and 4701 transitions. [2022-12-14 07:29:14,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 07:29:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 4701 transitions. [2022-12-14 07:29:14,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 07:29:14,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:14,842 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:14,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:29:14,842 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash -567501265, now seen corresponding path program 1 times [2022-12-14 07:29:14,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:14,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378136319] [2022-12-14 07:29:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:29:14,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:14,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378136319] [2022-12-14 07:29:14,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378136319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:14,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:14,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:29:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513323766] [2022-12-14 07:29:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:14,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:29:14,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:29:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:14,936 INFO L87 Difference]: Start difference. First operand 3493 states and 4701 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 07:29:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:15,722 INFO L93 Difference]: Finished difference Result 9301 states and 12879 transitions. [2022-12-14 07:29:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:29:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 66 [2022-12-14 07:29:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:15,740 INFO L225 Difference]: With dead ends: 9301 [2022-12-14 07:29:15,741 INFO L226 Difference]: Without dead ends: 6630 [2022-12-14 07:29:15,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:29:15,746 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 440 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:15,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1397 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:29:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2022-12-14 07:29:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 4793. [2022-12-14 07:29:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4793 states, 3724 states have (on average 1.3839957035445758) internal successors, (5154), 3764 states have internal predecessors, (5154), 654 states have call successors, (654), 415 states have call predecessors, (654), 414 states have return successors, (651), 614 states have call predecessors, (651), 651 states have call successors, (651) [2022-12-14 07:29:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 6459 transitions. [2022-12-14 07:29:16,143 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 6459 transitions. Word has length 66 [2022-12-14 07:29:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:16,144 INFO L495 AbstractCegarLoop]: Abstraction has 4793 states and 6459 transitions. [2022-12-14 07:29:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 07:29:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 6459 transitions. [2022-12-14 07:29:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 07:29:16,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:16,146 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-14 07:29:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:29:16,147 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1722416002, now seen corresponding path program 1 times [2022-12-14 07:29:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:16,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253872401] [2022-12-14 07:29:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:29:16,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253872401] [2022-12-14 07:29:16,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253872401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:16,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:16,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:29:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798262772] [2022-12-14 07:29:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:16,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:16,198 INFO L87 Difference]: Start difference. First operand 4793 states and 6459 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:29:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:16,606 INFO L93 Difference]: Finished difference Result 12432 states and 16654 transitions. [2022-12-14 07:29:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:16,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-12-14 07:29:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:16,626 INFO L225 Difference]: With dead ends: 12432 [2022-12-14 07:29:16,626 INFO L226 Difference]: Without dead ends: 7645 [2022-12-14 07:29:16,633 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 07:29:16,633 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 52 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:16,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 261 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7645 states. [2022-12-14 07:29:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7645 to 6833. [2022-12-14 07:29:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6833 states, 5448 states have (on average 1.381424375917768) internal successors, (7526), 5496 states have internal predecessors, (7526), 812 states have call successors, (812), 573 states have call predecessors, (812), 572 states have return successors, (809), 764 states have call predecessors, (809), 809 states have call successors, (809) [2022-12-14 07:29:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6833 states to 6833 states and 9147 transitions. [2022-12-14 07:29:17,035 INFO L78 Accepts]: Start accepts. Automaton has 6833 states and 9147 transitions. Word has length 69 [2022-12-14 07:29:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:17,036 INFO L495 AbstractCegarLoop]: Abstraction has 6833 states and 9147 transitions. [2022-12-14 07:29:17,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:29:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 6833 states and 9147 transitions. [2022-12-14 07:29:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 07:29:17,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:17,038 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:17,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:29:17,038 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:17,038 INFO L85 PathProgramCache]: Analyzing trace with hash -95301976, now seen corresponding path program 1 times [2022-12-14 07:29:17,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:17,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756318125] [2022-12-14 07:29:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:17,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:29:17,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756318125] [2022-12-14 07:29:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756318125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:17,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:17,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:29:17,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744734985] [2022-12-14 07:29:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:29:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:29:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:17,105 INFO L87 Difference]: Start difference. First operand 6833 states and 9147 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:29:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:17,734 INFO L93 Difference]: Finished difference Result 14358 states and 19459 transitions. [2022-12-14 07:29:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:29:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-12-14 07:29:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:17,762 INFO L225 Difference]: With dead ends: 14358 [2022-12-14 07:29:17,763 INFO L226 Difference]: Without dead ends: 9081 [2022-12-14 07:29:17,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:29:17,775 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 186 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:17,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 677 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:29:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2022-12-14 07:29:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 7709. [2022-12-14 07:29:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 6124 states have (on average 1.3732854343566296) internal successors, (8410), 6200 states have internal predecessors, (8410), 928 states have call successors, (928), 657 states have call predecessors, (928), 656 states have return successors, (925), 852 states have call predecessors, (925), 925 states have call successors, (925) [2022-12-14 07:29:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 10263 transitions. [2022-12-14 07:29:18,165 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 10263 transitions. Word has length 70 [2022-12-14 07:29:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:18,166 INFO L495 AbstractCegarLoop]: Abstraction has 7709 states and 10263 transitions. [2022-12-14 07:29:18,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:29:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 10263 transitions. [2022-12-14 07:29:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 07:29:18,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:18,168 INFO L195 NwaCegarLoop]: trace histogram [3, 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 07:29:18,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:29:18,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash 894360845, now seen corresponding path program 1 times [2022-12-14 07:29:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994702975] [2022-12-14 07:29:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:29:18,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994702975] [2022-12-14 07:29:18,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994702975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:29:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973217439] [2022-12-14 07:29:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:18,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:18,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:18,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:29:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:18,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:29:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:29:18,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:18,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973217439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:18,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:29:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 07:29:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786127842] [2022-12-14 07:29:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:18,327 INFO L87 Difference]: Start difference. First operand 7709 states and 10263 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:29:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:18,913 INFO L93 Difference]: Finished difference Result 18202 states and 24234 transitions. [2022-12-14 07:29:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-12-14 07:29:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:18,938 INFO L225 Difference]: With dead ends: 18202 [2022-12-14 07:29:18,938 INFO L226 Difference]: Without dead ends: 10499 [2022-12-14 07:29:18,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:18,951 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 63 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:18,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 265 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2022-12-14 07:29:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 9783. [2022-12-14 07:29:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 7882 states have (on average 1.3719868053793454) internal successors, (10814), 7966 states have internal predecessors, (10814), 1086 states have call successors, (1086), 815 states have call predecessors, (1086), 814 states have return successors, (1083), 1002 states have call predecessors, (1083), 1083 states have call successors, (1083) [2022-12-14 07:29:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 12983 transitions. [2022-12-14 07:29:19,468 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 12983 transitions. Word has length 71 [2022-12-14 07:29:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:19,469 INFO L495 AbstractCegarLoop]: Abstraction has 9783 states and 12983 transitions. [2022-12-14 07:29:19,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:29:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 12983 transitions. [2022-12-14 07:29:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 07:29:19,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:19,472 INFO L195 NwaCegarLoop]: trace histogram [3, 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 07:29:19,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:29:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 07:29:19,673 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1629554681, now seen corresponding path program 1 times [2022-12-14 07:29:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135301960] [2022-12-14 07:29:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 07:29:19,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:19,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135301960] [2022-12-14 07:29:19,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135301960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:19,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:19,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:29:19,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586251065] [2022-12-14 07:29:19,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:19,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:19,712 INFO L87 Difference]: Start difference. First operand 9783 states and 12983 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:29:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:20,459 INFO L93 Difference]: Finished difference Result 23555 states and 31285 transitions. [2022-12-14 07:29:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:20,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2022-12-14 07:29:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:20,491 INFO L225 Difference]: With dead ends: 23555 [2022-12-14 07:29:20,491 INFO L226 Difference]: Without dead ends: 14360 [2022-12-14 07:29:20,504 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 07:29:20,504 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:20,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 217 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14360 states. [2022-12-14 07:29:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14360 to 14343. [2022-12-14 07:29:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14343 states, 11561 states have (on average 1.3689992215206297) internal successors, (15827), 11689 states have internal predecessors, (15827), 1579 states have call successors, (1579), 1203 states have call predecessors, (1579), 1202 states have return successors, (1576), 1451 states have call predecessors, (1576), 1576 states have call successors, (1576) [2022-12-14 07:29:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14343 states to 14343 states and 18982 transitions. [2022-12-14 07:29:21,311 INFO L78 Accepts]: Start accepts. Automaton has 14343 states and 18982 transitions. Word has length 84 [2022-12-14 07:29:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:21,311 INFO L495 AbstractCegarLoop]: Abstraction has 14343 states and 18982 transitions. [2022-12-14 07:29:21,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:29:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 14343 states and 18982 transitions. [2022-12-14 07:29:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 07:29:21,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:21,314 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 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 07:29:21,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:29:21,314 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2093402119, now seen corresponding path program 1 times [2022-12-14 07:29:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:21,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715071391] [2022-12-14 07:29:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:21,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:29:21,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:21,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715071391] [2022-12-14 07:29:21,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715071391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:29:21,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602261572] [2022-12-14 07:29:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:21,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:21,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:21,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:29:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:21,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:29:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:29:21,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:21,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602261572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:21,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:29:21,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 07:29:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413238128] [2022-12-14 07:29:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:21,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:21,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:29:21,526 INFO L87 Difference]: Start difference. First operand 14343 states and 18982 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 07:29:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:22,688 INFO L93 Difference]: Finished difference Result 39097 states and 51978 transitions. [2022-12-14 07:29:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2022-12-14 07:29:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:22,736 INFO L225 Difference]: With dead ends: 39097 [2022-12-14 07:29:22,736 INFO L226 Difference]: Without dead ends: 26712 [2022-12-14 07:29:22,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:29:22,755 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 71 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:22,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 218 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26712 states. [2022-12-14 07:29:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26712 to 26707. [2022-12-14 07:29:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26707 states, 21559 states have (on average 1.366900134514588) internal successors, (29469), 21807 states have internal predecessors, (29469), 2917 states have call successors, (2917), 2231 states have call predecessors, (2917), 2230 states have return successors, (2914), 2669 states have call predecessors, (2914), 2914 states have call successors, (2914) [2022-12-14 07:29:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26707 states to 26707 states and 35300 transitions. [2022-12-14 07:29:24,415 INFO L78 Accepts]: Start accepts. Automaton has 26707 states and 35300 transitions. Word has length 98 [2022-12-14 07:29:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:24,415 INFO L495 AbstractCegarLoop]: Abstraction has 26707 states and 35300 transitions. [2022-12-14 07:29:24,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 07:29:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 26707 states and 35300 transitions. [2022-12-14 07:29:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 07:29:24,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:24,418 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:24,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:29:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 07:29:24,618 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -450333824, now seen corresponding path program 1 times [2022-12-14 07:29:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899666442] [2022-12-14 07:29:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:24,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:29:24,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899666442] [2022-12-14 07:29:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899666442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:29:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249094792] [2022-12-14 07:29:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:24,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:24,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:24,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:29:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:29:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:29:24,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:24,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249094792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:24,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:29:24,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 07:29:24,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82489942] [2022-12-14 07:29:24,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:24,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:24,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:29:24,797 INFO L87 Difference]: Start difference. First operand 26707 states and 35300 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 07:29:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:26,735 INFO L93 Difference]: Finished difference Result 67334 states and 90062 transitions. [2022-12-14 07:29:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-12-14 07:29:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:26,817 INFO L225 Difference]: With dead ends: 67334 [2022-12-14 07:29:26,818 INFO L226 Difference]: Without dead ends: 42585 [2022-12-14 07:29:26,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:29:26,850 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 84 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:26,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 279 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42585 states. [2022-12-14 07:29:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42585 to 40865. [2022-12-14 07:29:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40865 states, 32438 states have (on average 1.3536592884888095) internal successors, (43910), 32804 states have internal predecessors, (43910), 4832 states have call successors, (4832), 3595 states have call predecessors, (4832), 3594 states have return successors, (5156), 4466 states have call predecessors, (5156), 4829 states have call successors, (5156) [2022-12-14 07:29:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40865 states to 40865 states and 53898 transitions. [2022-12-14 07:29:29,259 INFO L78 Accepts]: Start accepts. Automaton has 40865 states and 53898 transitions. Word has length 99 [2022-12-14 07:29:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:29,259 INFO L495 AbstractCegarLoop]: Abstraction has 40865 states and 53898 transitions. [2022-12-14 07:29:29,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 07:29:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 40865 states and 53898 transitions. [2022-12-14 07:29:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 07:29:29,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:29,263 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-12-14 07:29:29,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:29:29,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 07:29:29,464 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1448797052, now seen corresponding path program 1 times [2022-12-14 07:29:29,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:29,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589980259] [2022-12-14 07:29:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:29,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:29:29,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:29,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589980259] [2022-12-14 07:29:29,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589980259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:29,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:29,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:29:29,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509046689] [2022-12-14 07:29:29,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:29,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:29,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:29,522 INFO L87 Difference]: Start difference. First operand 40865 states and 53898 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:29:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:32,303 INFO L93 Difference]: Finished difference Result 98423 states and 129666 transitions. [2022-12-14 07:29:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2022-12-14 07:29:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:32,434 INFO L225 Difference]: With dead ends: 98423 [2022-12-14 07:29:32,434 INFO L226 Difference]: Without dead ends: 57564 [2022-12-14 07:29:32,487 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 07:29:32,488 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 60 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:32,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 230 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2022-12-14 07:29:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 49019. [2022-12-14 07:29:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49019 states, 39148 states have (on average 1.3588433636456525) internal successors, (53196), 39716 states have internal predecessors, (53196), 5554 states have call successors, (5554), 4317 states have call predecessors, (5554), 4316 states have return successors, (5878), 4986 states have call predecessors, (5878), 5551 states have call successors, (5878) [2022-12-14 07:29:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49019 states to 49019 states and 64628 transitions. [2022-12-14 07:29:35,466 INFO L78 Accepts]: Start accepts. Automaton has 49019 states and 64628 transitions. Word has length 98 [2022-12-14 07:29:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:35,466 INFO L495 AbstractCegarLoop]: Abstraction has 49019 states and 64628 transitions. [2022-12-14 07:29:35,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:29:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 49019 states and 64628 transitions. [2022-12-14 07:29:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 07:29:35,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:35,471 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 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 07:29:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:29:35,471 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1637176725, now seen corresponding path program 1 times [2022-12-14 07:29:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454123148] [2022-12-14 07:29:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:29:35,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454123148] [2022-12-14 07:29:35,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454123148] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:29:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038777766] [2022-12-14 07:29:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:35,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:35,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:35,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:29:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:29:35,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:29:35,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:35,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038777766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:35,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:29:35,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-12-14 07:29:35,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334375737] [2022-12-14 07:29:35,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:29:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:29:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:29:35,697 INFO L87 Difference]: Start difference. First operand 49019 states and 64628 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 07:29:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:39,527 INFO L93 Difference]: Finished difference Result 113193 states and 148554 transitions. [2022-12-14 07:29:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:29:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 100 [2022-12-14 07:29:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:39,669 INFO L225 Difference]: With dead ends: 113193 [2022-12-14 07:29:39,669 INFO L226 Difference]: Without dead ends: 64180 [2022-12-14 07:29:39,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 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 07:29:39,720 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 342 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:39,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 246 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:29:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64180 states. [2022-12-14 07:29:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64180 to 64167. [2022-12-14 07:29:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64167 states, 49825 states have (on average 1.3222478675363774) internal successors, (65881), 50393 states have internal predecessors, (65881), 8304 states have call successors, (8304), 6038 states have call predecessors, (8304), 6037 states have return successors, (8955), 7736 states have call predecessors, (8955), 8301 states have call successors, (8955) [2022-12-14 07:29:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64167 states to 64167 states and 83140 transitions. [2022-12-14 07:29:44,037 INFO L78 Accepts]: Start accepts. Automaton has 64167 states and 83140 transitions. Word has length 100 [2022-12-14 07:29:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:44,038 INFO L495 AbstractCegarLoop]: Abstraction has 64167 states and 83140 transitions. [2022-12-14 07:29:44,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 07:29:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 64167 states and 83140 transitions. [2022-12-14 07:29:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 07:29:44,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:44,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-12-14 07:29:44,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:29:44,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 07:29:44,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash -812505051, now seen corresponding path program 1 times [2022-12-14 07:29:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:44,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589099927] [2022-12-14 07:29:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:29:44,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589099927] [2022-12-14 07:29:44,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589099927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:29:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467559575] [2022-12-14 07:29:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:44,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:44,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:44,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:29:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:44,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:29:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:29:44,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:44,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467559575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:44,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:29:44,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2022-12-14 07:29:44,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653874945] [2022-12-14 07:29:44,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:44,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:44,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:44,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:29:44,472 INFO L87 Difference]: Start difference. First operand 64167 states and 83140 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:29:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:51,477 INFO L93 Difference]: Finished difference Result 168344 states and 218431 transitions. [2022-12-14 07:29:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 99 [2022-12-14 07:29:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:51,733 INFO L225 Difference]: With dead ends: 168344 [2022-12-14 07:29:51,733 INFO L226 Difference]: Without dead ends: 126976 [2022-12-14 07:29:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:29:51,797 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 60 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:51,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:29:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126976 states. [2022-12-14 07:29:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126976 to 126963. [2022-12-14 07:29:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126963 states, 98967 states have (on average 1.3201471197469863) internal successors, (130651), 100099 states have internal predecessors, (130651), 15923 states have call successors, (15923), 12073 states have call predecessors, (15923), 12072 states have return successors, (16908), 14791 states have call predecessors, (16908), 15920 states have call successors, (16908) [2022-12-14 07:29:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126963 states to 126963 states and 163482 transitions. [2022-12-14 07:29:59,592 INFO L78 Accepts]: Start accepts. Automaton has 126963 states and 163482 transitions. Word has length 99 [2022-12-14 07:29:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:59,593 INFO L495 AbstractCegarLoop]: Abstraction has 126963 states and 163482 transitions. [2022-12-14 07:29:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:29:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 126963 states and 163482 transitions. [2022-12-14 07:29:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 07:29:59,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:59,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 07:29:59,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:29:59,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 07:29:59,802 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1784179738, now seen corresponding path program 1 times [2022-12-14 07:29:59,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:59,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693372138] [2022-12-14 07:29:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:29:59,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:59,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693372138] [2022-12-14 07:29:59,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693372138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:59,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:59,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:29:59,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348000890] [2022-12-14 07:29:59,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:29:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:29:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:29:59,869 INFO L87 Difference]: Start difference. First operand 126963 states and 163482 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:30:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:07,685 INFO L93 Difference]: Finished difference Result 210787 states and 273368 transitions. [2022-12-14 07:30:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:30:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2022-12-14 07:30:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:07,963 INFO L225 Difference]: With dead ends: 210787 [2022-12-14 07:30:07,964 INFO L226 Difference]: Without dead ends: 128912 [2022-12-14 07:30:08,067 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 07:30:08,068 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 217 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:08,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 344 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:30:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128912 states. [2022-12-14 07:30:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128912 to 126963. [2022-12-14 07:30:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126963 states, 98967 states have (on average 1.3114977719846008) internal successors, (129795), 100099 states have internal predecessors, (129795), 15923 states have call successors, (15923), 12073 states have call predecessors, (15923), 12072 states have return successors, (16908), 14791 states have call predecessors, (16908), 15920 states have call successors, (16908) [2022-12-14 07:30:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126963 states to 126963 states and 162626 transitions. [2022-12-14 07:30:16,439 INFO L78 Accepts]: Start accepts. Automaton has 126963 states and 162626 transitions. Word has length 99 [2022-12-14 07:30:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:16,440 INFO L495 AbstractCegarLoop]: Abstraction has 126963 states and 162626 transitions. [2022-12-14 07:30:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:30:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 126963 states and 162626 transitions. [2022-12-14 07:30:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 07:30:16,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:16,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-12-14 07:30:16,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:30:16,445 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash -632714967, now seen corresponding path program 1 times [2022-12-14 07:30:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088203788] [2022-12-14 07:30:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:30:16,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:16,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088203788] [2022-12-14 07:30:16,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088203788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:16,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:30:16,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:30:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221077820] [2022-12-14 07:30:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:16,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:30:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:30:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:30:16,503 INFO L87 Difference]: Start difference. First operand 126963 states and 162626 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:30:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:29,957 INFO L93 Difference]: Finished difference Result 347767 states and 446486 transitions. [2022-12-14 07:30:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:30:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-12-14 07:30:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:30,571 INFO L225 Difference]: With dead ends: 347767 [2022-12-14 07:30:30,571 INFO L226 Difference]: Without dead ends: 220810 [2022-12-14 07:30:30,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:30,719 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 90 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:30,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 467 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:30:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220810 states. [2022-12-14 07:30:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220810 to 219839. [2022-12-14 07:30:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219839 states, 167301 states have (on average 1.2852941703875052) internal successors, (215031), 170143 states have internal predecessors, (215031), 29561 states have call successors, (29561), 22009 states have call predecessors, (29561), 22976 states have return successors, (35574), 27687 states have call predecessors, (35574), 29558 states have call successors, (35574) [2022-12-14 07:30:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219839 states to 219839 states and 280166 transitions. [2022-12-14 07:30:46,001 INFO L78 Accepts]: Start accepts. Automaton has 219839 states and 280166 transitions. Word has length 100 [2022-12-14 07:30:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:46,001 INFO L495 AbstractCegarLoop]: Abstraction has 219839 states and 280166 transitions. [2022-12-14 07:30:46,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:30:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 219839 states and 280166 transitions. [2022-12-14 07:30:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 07:30:46,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:46,008 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:30:46,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 07:30:46,008 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 790289937, now seen corresponding path program 1 times [2022-12-14 07:30:46,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391034407] [2022-12-14 07:30:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:46,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 07:30:46,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391034407] [2022-12-14 07:30:46,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391034407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:30:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064991755] [2022-12-14 07:30:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:46,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:46,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:46,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:30:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:30:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:30:46,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:30:46,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064991755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:46,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:30:46,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-12-14 07:30:46,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554473261] [2022-12-14 07:30:46,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:46,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:30:46,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:30:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:30:46,247 INFO L87 Difference]: Start difference. First operand 219839 states and 280166 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 07:31:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:00,246 INFO L93 Difference]: Finished difference Result 439682 states and 565768 transitions. [2022-12-14 07:31:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:31:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 102 [2022-12-14 07:31:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:00,814 INFO L225 Difference]: With dead ends: 439682 [2022-12-14 07:31:00,814 INFO L226 Difference]: Without dead ends: 219849 [2022-12-14 07:31:01,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:31:01,062 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 197 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:01,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 684 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219849 states. [2022-12-14 07:31:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219849 to 194569. [2022-12-14 07:31:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194569 states, 149561 states have (on average 1.288123240684403) internal successors, (192653), 152242 states have internal predecessors, (192653), 24998 states have call successors, (24998), 19202 states have call predecessors, (24998), 20009 states have return successors, (30051), 23125 states have call predecessors, (30051), 24995 states have call successors, (30051) [2022-12-14 07:31:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194569 states to 194569 states and 247702 transitions. [2022-12-14 07:31:15,251 INFO L78 Accepts]: Start accepts. Automaton has 194569 states and 247702 transitions. Word has length 102 [2022-12-14 07:31:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:15,251 INFO L495 AbstractCegarLoop]: Abstraction has 194569 states and 247702 transitions. [2022-12-14 07:31:15,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 07:31:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 194569 states and 247702 transitions. [2022-12-14 07:31:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 07:31:15,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:15,257 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 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, 1, 1] [2022-12-14 07:31:15,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:31:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 07:31:15,459 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1227371732, now seen corresponding path program 1 times [2022-12-14 07:31:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:15,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658193107] [2022-12-14 07:31:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 07:31:15,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:15,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658193107] [2022-12-14 07:31:15,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658193107] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:15,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:15,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:15,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452353157] [2022-12-14 07:31:15,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:15,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:15,523 INFO L87 Difference]: Start difference. First operand 194569 states and 247702 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 07:31:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:27,915 INFO L93 Difference]: Finished difference Result 384006 states and 489021 transitions. [2022-12-14 07:31:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 103 [2022-12-14 07:31:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:28,462 INFO L225 Difference]: With dead ends: 384006 [2022-12-14 07:31:28,462 INFO L226 Difference]: Without dead ends: 189525 [2022-12-14 07:31:28,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:31:28,684 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 93 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:28,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 214 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:31:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189525 states. [2022-12-14 07:31:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189525 to 189193. [2022-12-14 07:31:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189193 states, 145337 states have (on average 1.2877863173176824) internal successors, (187163), 147980 states have internal predecessors, (187163), 24364 states have call successors, (24364), 18684 states have call predecessors, (24364), 19491 states have return successors, (29417), 22529 states have call predecessors, (29417), 24361 states have call successors, (29417) [2022-12-14 07:31:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189193 states to 189193 states and 240944 transitions. [2022-12-14 07:31:41,843 INFO L78 Accepts]: Start accepts. Automaton has 189193 states and 240944 transitions. Word has length 103 [2022-12-14 07:31:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:41,843 INFO L495 AbstractCegarLoop]: Abstraction has 189193 states and 240944 transitions. [2022-12-14 07:31:41,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 07:31:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 189193 states and 240944 transitions. [2022-12-14 07:31:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 07:31:41,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:41,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-12-14 07:31:41,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 07:31:41,847 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash 735331730, now seen corresponding path program 1 times [2022-12-14 07:31:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813886068] [2022-12-14 07:31:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:31:41,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:41,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813886068] [2022-12-14 07:31:41,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813886068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:41,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:41,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:31:41,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639686608] [2022-12-14 07:31:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:41,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:31:41,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:31:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:31:41,933 INFO L87 Difference]: Start difference. First operand 189193 states and 240944 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:31:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:53,487 INFO L93 Difference]: Finished difference Result 364546 states and 469536 transitions. [2022-12-14 07:31:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:31:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 101 [2022-12-14 07:31:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:54,010 INFO L225 Difference]: With dead ends: 364546 [2022-12-14 07:31:54,010 INFO L226 Difference]: Without dead ends: 176213 [2022-12-14 07:31:54,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:31:54,203 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 132 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:54,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 318 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:31:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176213 states. [2022-12-14 07:32:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176213 to 155719. [2022-12-14 07:32:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155719 states, 117075 states have (on average 1.263873585308563) internal successors, (147968), 120374 states have internal predecessors, (147968), 21519 states have call successors, (21519), 15743 states have call predecessors, (21519), 17124 states have return successors, (31482), 19602 states have call predecessors, (31482), 21516 states have call successors, (31482) [2022-12-14 07:32:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155719 states to 155719 states and 200969 transitions. [2022-12-14 07:32:06,018 INFO L78 Accepts]: Start accepts. Automaton has 155719 states and 200969 transitions. Word has length 101 [2022-12-14 07:32:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:06,018 INFO L495 AbstractCegarLoop]: Abstraction has 155719 states and 200969 transitions. [2022-12-14 07:32:06,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:32:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 155719 states and 200969 transitions. [2022-12-14 07:32:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 07:32:06,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:06,023 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:06,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:32:06,023 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1535370786, now seen corresponding path program 1 times [2022-12-14 07:32:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:06,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686675873] [2022-12-14 07:32:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:06,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:32:06,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686675873] [2022-12-14 07:32:06,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686675873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:06,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:06,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:32:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148525214] [2022-12-14 07:32:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:32:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:32:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:32:06,055 INFO L87 Difference]: Start difference. First operand 155719 states and 200969 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 07:32:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:20,575 INFO L93 Difference]: Finished difference Result 356237 states and 476673 transitions. [2022-12-14 07:32:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:32:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 114 [2022-12-14 07:32:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:21,113 INFO L225 Difference]: With dead ends: 356237 [2022-12-14 07:32:21,113 INFO L226 Difference]: Without dead ends: 200525 [2022-12-14 07:32:21,370 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 07:32:21,370 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 216 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:21,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 344 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200525 states. [2022-12-14 07:32:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200525 to 199355. [2022-12-14 07:32:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199355 states, 150347 states have (on average 1.2405501938848131) internal successors, (186513), 154701 states have internal predecessors, (186513), 27214 states have call successors, (27214), 19949 states have call predecessors, (27214), 21793 states have return successors, (40065), 24705 states have call predecessors, (40065), 27211 states have call successors, (40065) [2022-12-14 07:32:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199355 states to 199355 states and 253792 transitions. [2022-12-14 07:32:36,786 INFO L78 Accepts]: Start accepts. Automaton has 199355 states and 253792 transitions. Word has length 114 [2022-12-14 07:32:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:36,787 INFO L495 AbstractCegarLoop]: Abstraction has 199355 states and 253792 transitions. [2022-12-14 07:32:36,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 07:32:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 199355 states and 253792 transitions. [2022-12-14 07:32:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 07:32:36,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:36,792 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:36,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 07:32:36,792 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1802668127, now seen corresponding path program 1 times [2022-12-14 07:32:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715796366] [2022-12-14 07:32:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 07:32:36,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715796366] [2022-12-14 07:32:36,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715796366] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:36,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:36,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:32:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501347670] [2022-12-14 07:32:36,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:36,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:32:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:32:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:32:36,829 INFO L87 Difference]: Start difference. First operand 199355 states and 253792 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:32:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:51,810 INFO L93 Difference]: Finished difference Result 353478 states and 452069 transitions. [2022-12-14 07:32:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:32:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 114 [2022-12-14 07:32:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:52,351 INFO L225 Difference]: With dead ends: 353478 [2022-12-14 07:32:52,352 INFO L226 Difference]: Without dead ends: 199360 [2022-12-14 07:32:52,659 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 07:32:52,660 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 195 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:52,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 346 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199360 states. [2022-12-14 07:33:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199360 to 199355. [2022-12-14 07:33:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199355 states, 150347 states have (on average 1.2365328207413517) internal successors, (185909), 154701 states have internal predecessors, (185909), 27214 states have call successors, (27214), 19949 states have call predecessors, (27214), 21793 states have return successors, (40065), 24705 states have call predecessors, (40065), 27211 states have call successors, (40065) [2022-12-14 07:33:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199355 states to 199355 states and 253188 transitions. [2022-12-14 07:33:08,614 INFO L78 Accepts]: Start accepts. Automaton has 199355 states and 253188 transitions. Word has length 114 [2022-12-14 07:33:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:08,614 INFO L495 AbstractCegarLoop]: Abstraction has 199355 states and 253188 transitions. [2022-12-14 07:33:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:33:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 199355 states and 253188 transitions. [2022-12-14 07:33:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 07:33:08,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:08,619 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:08,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 07:33:08,620 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash -641817990, now seen corresponding path program 1 times [2022-12-14 07:33:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002383820] [2022-12-14 07:33:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 07:33:08,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002383820] [2022-12-14 07:33:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002383820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354436304] [2022-12-14 07:33:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:08,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:08,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:33:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:33:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 07:33:08,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:33:08,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354436304] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:08,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:33:08,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-12-14 07:33:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405609710] [2022-12-14 07:33:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:33:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:33:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:33:08,816 INFO L87 Difference]: Start difference. First operand 199355 states and 253188 transitions. Second operand has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:33:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:30,554 INFO L93 Difference]: Finished difference Result 468243 states and 594896 transitions. [2022-12-14 07:33:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:33:30,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 115 [2022-12-14 07:33:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:31,281 INFO L225 Difference]: With dead ends: 468243 [2022-12-14 07:33:31,281 INFO L226 Difference]: Without dead ends: 268974 [2022-12-14 07:33:31,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 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 07:33:31,571 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 298 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:31,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 201 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:33:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268974 states. [2022-12-14 07:33:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268974 to 257242. [2022-12-14 07:33:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257242 states, 191987 states have (on average 1.2284894289717534) internal successors, (235854), 196867 states have internal predecessors, (235854), 36880 states have call successors, (36880), 26213 states have call predecessors, (36880), 28374 states have return successors, (52745), 34162 states have call predecessors, (52745), 36877 states have call successors, (52745) [2022-12-14 07:33:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257242 states to 257242 states and 325479 transitions. [2022-12-14 07:33:54,443 INFO L78 Accepts]: Start accepts. Automaton has 257242 states and 325479 transitions. Word has length 115 [2022-12-14 07:33:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:54,444 INFO L495 AbstractCegarLoop]: Abstraction has 257242 states and 325479 transitions. [2022-12-14 07:33:54,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:33:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 257242 states and 325479 transitions. [2022-12-14 07:33:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 07:33:54,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:54,448 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:54,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:33:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:54,649 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1852037381, now seen corresponding path program 1 times [2022-12-14 07:33:54,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:54,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564039545] [2022-12-14 07:33:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:33:54,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:54,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564039545] [2022-12-14 07:33:54,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564039545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:54,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:33:54,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:33:54,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008961923] [2022-12-14 07:33:54,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:54,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:33:54,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:54,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:33:54,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:33:54,810 INFO L87 Difference]: Start difference. First operand 257242 states and 325479 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:34:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:09,467 INFO L93 Difference]: Finished difference Result 420518 states and 542567 transitions. [2022-12-14 07:34:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:34:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 114 [2022-12-14 07:34:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:09,938 INFO L225 Difference]: With dead ends: 420518 [2022-12-14 07:34:09,938 INFO L226 Difference]: Without dead ends: 165438 [2022-12-14 07:34:10,251 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 07:34:10,252 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 211 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:10,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 317 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:34:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165438 states. [2022-12-14 07:34:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165438 to 163997. [2022-12-14 07:34:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163997 states, 123390 states have (on average 1.2054299375962396) internal successors, (148738), 126516 states have internal predecessors, (148738), 22773 states have call successors, (22773), 16371 states have call predecessors, (22773), 17833 states have return successors, (28957), 21110 states have call predecessors, (28957), 22770 states have call successors, (28957) [2022-12-14 07:34:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163997 states to 163997 states and 200468 transitions. [2022-12-14 07:34:25,056 INFO L78 Accepts]: Start accepts. Automaton has 163997 states and 200468 transitions. Word has length 114 [2022-12-14 07:34:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:25,056 INFO L495 AbstractCegarLoop]: Abstraction has 163997 states and 200468 transitions. [2022-12-14 07:34:25,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:34:25,056 INFO L276 IsEmpty]: Start isEmpty. Operand 163997 states and 200468 transitions. [2022-12-14 07:34:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 07:34:25,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:25,060 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 07:34:25,060 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2100770991, now seen corresponding path program 1 times [2022-12-14 07:34:25,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367525683] [2022-12-14 07:34:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:25,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:34:25,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367525683] [2022-12-14 07:34:25,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367525683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:34:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239429404] [2022-12-14 07:34:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:34:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:34:25,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:34:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:34:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:34:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:34:25,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:34:25,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239429404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:25,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:34:25,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2022-12-14 07:34:25,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842876413] [2022-12-14 07:34:25,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:25,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:34:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:25,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:34:25,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:34:25,422 INFO L87 Difference]: Start difference. First operand 163997 states and 200468 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 07:34:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:42,228 INFO L93 Difference]: Finished difference Result 275369 states and 337041 transitions. [2022-12-14 07:34:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:34:42,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 116 [2022-12-14 07:34:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:42,629 INFO L225 Difference]: With dead ends: 275369 [2022-12-14 07:34:42,629 INFO L226 Difference]: Without dead ends: 172183 [2022-12-14 07:34:42,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:34:42,788 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 221 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:42,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 847 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:34:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172183 states. [2022-12-14 07:34:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172183 to 166151. [2022-12-14 07:34:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166151 states, 125114 states have (on average 1.2069312786738495) internal successors, (151004), 128250 states have internal predecessors, (151004), 22988 states have call successors, (22988), 16586 states have call predecessors, (22988), 18048 states have return successors, (29172), 21315 states have call predecessors, (29172), 22985 states have call successors, (29172) [2022-12-14 07:34:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166151 states to 166151 states and 203164 transitions. [2022-12-14 07:34:58,290 INFO L78 Accepts]: Start accepts. Automaton has 166151 states and 203164 transitions. Word has length 116 [2022-12-14 07:34:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 166151 states and 203164 transitions. [2022-12-14 07:34:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 07:34:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 166151 states and 203164 transitions. [2022-12-14 07:34:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 07:34:58,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:58,294 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:58,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:34:58,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 07:34:58,495 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2080288449, now seen corresponding path program 1 times [2022-12-14 07:34:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:58,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747117175] [2022-12-14 07:34:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 07:34:58,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:58,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747117175] [2022-12-14 07:34:58,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747117175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:34:58,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537438974] [2022-12-14 07:34:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:58,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:34:58,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:34:58,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:34:58,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:34:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:34:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 07:34:58,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:34:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 07:34:58,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537438974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:34:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357917520] [2022-12-14 07:34:59,003 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 07:34:59,003 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:34:59,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:34:59,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:34:59,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:03,526 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 49 for LOIs [2022-12-14 07:35:03,528 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 117 for LOIs [2022-12-14 07:35:03,574 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 127 for LOIs [2022-12-14 07:35:03,621 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 127 for LOIs [2022-12-14 07:35:03,644 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 81 for LOIs [2022-12-14 07:35:03,658 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 139 for LOIs [2022-12-14 07:35:04,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:13,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9252700#(and (= ~P_2_ev~0 0) (= ~P_2_st~0 0) (= ~C_1_pc~0 1) (= ~e~0 0) (= ~data_0~0 0) (<= 0 ~i~0) (= (+ ~num~0 1) 0) (= ~P_1_ev~0 0) (= ~P_2_pc~0 0) (= ~P_2_i~0 1) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (= ~P_1_pc~0 0) (= |#NULL.offset| 0) (<= 0 ~timer~0) (= ~C_1_ev~0 0) (<= 0 |#StackHeapBarrier|) (= ~data_1~0 0) (= ~C_1_st~0 1) (= ~C_1_i~0 1) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:13,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:13,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:13,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 3, 4] total 21 [2022-12-14 07:35:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409992194] [2022-12-14 07:35:13,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:35:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:35:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3651, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 07:35:13,097 INFO L87 Difference]: Start difference. First operand 166151 states and 203164 transitions. Second operand has 21 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 9 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-12-14 07:35:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:28,441 INFO L93 Difference]: Finished difference Result 291701 states and 360805 transitions. [2022-12-14 07:35:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-14 07:35:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 9 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 114 [2022-12-14 07:35:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:28,730 INFO L225 Difference]: With dead ends: 291701 [2022-12-14 07:35:28,730 INFO L226 Difference]: Without dead ends: 125522 [2022-12-14 07:35:28,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 306 SyntacticMatches, 13 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21048 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3611, Invalid=44131, Unknown=0, NotChecked=0, Total=47742 [2022-12-14 07:35:28,938 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1821 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:28,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1828 Valid, 2443 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:35:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125522 states. [2022-12-14 07:35:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125522 to 91596. [2022-12-14 07:35:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91596 states, 70303 states have (on average 1.2112854358988947) internal successors, (85157), 71722 states have internal predecessors, (85157), 11799 states have call successors, (11799), 8889 states have call predecessors, (11799), 9493 states have return successors, (14490), 10984 states have call predecessors, (14490), 11796 states have call successors, (14490) [2022-12-14 07:35:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91596 states to 91596 states and 111446 transitions. [2022-12-14 07:35:38,224 INFO L78 Accepts]: Start accepts. Automaton has 91596 states and 111446 transitions. Word has length 114 [2022-12-14 07:35:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:38,225 INFO L495 AbstractCegarLoop]: Abstraction has 91596 states and 111446 transitions. [2022-12-14 07:35:38,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 9 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-12-14 07:35:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 91596 states and 111446 transitions. [2022-12-14 07:35:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 07:35:38,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:38,227 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 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, 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 07:35:38,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:35:38,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 07:35:38,429 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1031944584, now seen corresponding path program 1 times [2022-12-14 07:35:38,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501046744] [2022-12-14 07:35:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:38,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 07:35:38,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501046744] [2022-12-14 07:35:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501046744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:38,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:38,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:35:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013580138] [2022-12-14 07:35:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:35:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:35:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:35:38,468 INFO L87 Difference]: Start difference. First operand 91596 states and 111446 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:35:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:46,809 INFO L93 Difference]: Finished difference Result 175721 states and 214217 transitions. [2022-12-14 07:35:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:35:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 126 [2022-12-14 07:35:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:46,996 INFO L225 Difference]: With dead ends: 175721 [2022-12-14 07:35:46,996 INFO L226 Difference]: Without dead ends: 88649 [2022-12-14 07:35:47,109 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 07:35:47,110 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:47,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 342 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:35:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88649 states. [2022-12-14 07:35:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88649 to 88644. [2022-12-14 07:35:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88644 states, 68245 states have (on average 1.2122206755073632) internal successors, (82728), 69592 states have internal predecessors, (82728), 11316 states have call successors, (11316), 8545 states have call predecessors, (11316), 9082 states have return successors, (13863), 10506 states have call predecessors, (13863), 11313 states have call successors, (13863) [2022-12-14 07:35:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88644 states to 88644 states and 107907 transitions. [2022-12-14 07:35:56,078 INFO L78 Accepts]: Start accepts. Automaton has 88644 states and 107907 transitions. Word has length 126 [2022-12-14 07:35:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:56,079 INFO L495 AbstractCegarLoop]: Abstraction has 88644 states and 107907 transitions. [2022-12-14 07:35:56,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:35:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 88644 states and 107907 transitions. [2022-12-14 07:35:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 07:35:56,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:56,081 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:56,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 07:35:56,081 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1965345174, now seen corresponding path program 1 times [2022-12-14 07:35:56,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:56,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942814203] [2022-12-14 07:35:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 07:35:56,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942814203] [2022-12-14 07:35:56,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942814203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456340714] [2022-12-14 07:35:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:56,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:56,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:56,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:35:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:56,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:35:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:35:56,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 07:35:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456340714] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082176259] [2022-12-14 07:35:56,706 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 07:35:56,706 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:56,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:56,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:56,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:36:01,370 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 118 for LOIs [2022-12-14 07:36:01,391 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 130 for LOIs [2022-12-14 07:36:01,415 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 130 for LOIs [2022-12-14 07:36:01,439 INFO L197 IcfgInterpreter]: Interpreting procedure write_data with input of size 88 for LOIs [2022-12-14 07:36:01,552 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 78 for LOIs [2022-12-14 07:36:01,561 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 43 for LOIs [2022-12-14 07:36:01,566 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 142 for LOIs [2022-12-14 07:36:01,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:36:10,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10178069#(and (<= ~P_1_pc~0 1) (<= 0 ~P_2_pc~0) (<= ~num~0 2) (or (and (= ~P_2_ev~0 0) (= ~i~0 0) (= ~e~0 0) (= ~P_1_ev~0 0) (= ~P_2_st~0 1) (= ~P_2_i~0 1) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= ~P_2_ev~0 0) (= ~i~0 0) (= ~e~0 0) (= ~P_1_ev~0 0) (= ~P_1_st~0 1) (= ~P_2_i~0 1) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= ~timer~0 0) (<= ~C_1_i~0 1) (<= ~C_1_ev~0 0) (<= 0 ~C_1_ev~0) (<= 0 ~P_1_pc~0) (<= 0 ~C_1_pc~0) (<= 0 ~timer~0) (<= ~C_1_pc~0 0) (<= 0 ~num~0) (<= ~P_2_pc~0 1) (<= 0 |#StackHeapBarrier|) (<= 1 ~C_1_i~0))' at error location [2022-12-14 07:36:10,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:36:10,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:36:10,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 10] total 27 [2022-12-14 07:36:10,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540570538] [2022-12-14 07:36:10,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:36:10,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 07:36:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:36:10,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 07:36:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=4249, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 07:36:10,876 INFO L87 Difference]: Start difference. First operand 88644 states and 107907 transitions. Second operand has 27 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 10 states have call successors, (40), 5 states have call predecessors, (40), 9 states have return successors, (39), 11 states have call predecessors, (39), 10 states have call successors, (39) [2022-12-14 07:36:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:36:24,415 INFO L93 Difference]: Finished difference Result 167875 states and 204879 transitions. [2022-12-14 07:36:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-12-14 07:36:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 10 states have call successors, (40), 5 states have call predecessors, (40), 9 states have return successors, (39), 11 states have call predecessors, (39), 10 states have call successors, (39) Word has length 127 [2022-12-14 07:36:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:36:24,567 INFO L225 Difference]: With dead ends: 167875 [2022-12-14 07:36:24,568 INFO L226 Difference]: Without dead ends: 79594 [2022-12-14 07:36:24,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 381 SyntacticMatches, 11 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21690 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5340, Invalid=44166, Unknown=0, NotChecked=0, Total=49506 [2022-12-14 07:36:24,670 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 2050 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 2819 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 2819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:36:24,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 3284 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 2819 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:36:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2022-12-14 07:36:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 65075. [2022-12-14 07:36:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65075 states, 51339 states have (on average 1.200315549582189) internal successors, (61623), 52205 states have internal predecessors, (61623), 7271 states have call successors, (7271), 6147 states have call predecessors, (7271), 6464 states have return successors, (7948), 6722 states have call predecessors, (7948), 7268 states have call successors, (7948) [2022-12-14 07:36:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65075 states to 65075 states and 76842 transitions. [2022-12-14 07:36:31,816 INFO L78 Accepts]: Start accepts. Automaton has 65075 states and 76842 transitions. Word has length 127 [2022-12-14 07:36:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:36:31,816 INFO L495 AbstractCegarLoop]: Abstraction has 65075 states and 76842 transitions. [2022-12-14 07:36:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 10 states have call successors, (40), 5 states have call predecessors, (40), 9 states have return successors, (39), 11 states have call predecessors, (39), 10 states have call successors, (39) [2022-12-14 07:36:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 65075 states and 76842 transitions. [2022-12-14 07:36:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 07:36:31,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:36:31,819 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 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, 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 07:36:31,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:36:32,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 07:36:32,020 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:36:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:36:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 328764083, now seen corresponding path program 1 times [2022-12-14 07:36:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:36:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908615925] [2022-12-14 07:36:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:36:32,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:36:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908615925] [2022-12-14 07:36:32,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908615925] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:36:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887319226] [2022-12-14 07:36:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:32,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:32,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:36:32,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:36:32,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d60449fd-aa0b-4b38-b645-1bd61b058bc3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:36:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:36:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:36:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 07:36:32,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 07:36:32,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887319226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:32,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021367703] [2022-12-14 07:36:32,544 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-12-14 07:36:32,545 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:36:32,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:36:32,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:36:32,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs