./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs --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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:34:03,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:34:03,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:34:03,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:34:03,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:34:03,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:34:03,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:34:03,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:34:03,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:34:03,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:34:03,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:34:03,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:34:03,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:34:03,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:34:03,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:34:03,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:34:03,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:34:03,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:34:03,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:34:03,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:34:03,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:34:03,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:34:03,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:34:03,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:34:03,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:34:03,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:34:03,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:34:03,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:34:03,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:34:03,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:34:03,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:34:03,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:34:03,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:34:03,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:34:03,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:34:03,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:34:03,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:34:03,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:34:03,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:34:03,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:34:03,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:34:03,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:34:03,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:34:03,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:34:03,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:34:03,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:34:03,378 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:34:03,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:34:03,379 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:34:03,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:34:03,379 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:34:03,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:34:03,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:34:03,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:34:03,380 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:34:03,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:34:03,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:34:03,381 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:34:03,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:34:03,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:34:03,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:34:03,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:34:03,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:34:03,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:34:03,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:34:03,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:34:03,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:34:03,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:34:03,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:34:03,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:34:03,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:34:03,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:34:03,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:34:03,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:03,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:34:03,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:34:03,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:34:03,386 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:34:03,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:34:03,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:34:03,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:34:03,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:34:03,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-19 13:34:03,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:34:03,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:34:03,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:34:03,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:34:03,661 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:34:03,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-19 13:34:03,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/842f141d0/7879a571766040f584091bbf2399c3d7/FLAGfca3f64ec [2021-11-19 13:34:04,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:34:04,435 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-19 13:34:04,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/842f141d0/7879a571766040f584091bbf2399c3d7/FLAGfca3f64ec [2021-11-19 13:34:04,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/842f141d0/7879a571766040f584091bbf2399c3d7 [2021-11-19 13:34:04,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:34:04,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:34:04,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:04,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:34:04,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:34:04,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:04" (1/1) ... [2021-11-19 13:34:04,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d2e504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:04, skipping insertion in model container [2021-11-19 13:34:04,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:04" (1/1) ... [2021-11-19 13:34:04,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:34:04,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:34:05,202 WARN L230 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_4345a559-dfcb-4897-873c-3c98a166fdb0/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-19 13:34:05,247 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:05,257 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:34:05,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56c3ac14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:05, skipping insertion in model container [2021-11-19 13:34:05,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:05,259 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:34:05,270 INFO L158 Benchmark]: Toolchain (without parser) took 622.88ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 54.3MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 13:34:05,271 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:34:05,272 INFO L158 Benchmark]: CACSL2BoogieTranslator took 618.80ms. Allocated memory is still 92.3MB. Free memory was 67.9MB in the beginning and 54.3MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:34:05,274 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 618.80ms. Allocated memory is still 92.3MB. Free memory was 67.9MB in the beginning and 54.3MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2979]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs --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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:34:07,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:34:07,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:34:07,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:34:07,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:34:07,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:34:07,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:34:07,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:34:07,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:34:07,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:34:07,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:34:07,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:34:07,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:34:07,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:34:07,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:34:07,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:34:07,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:34:07,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:34:07,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:34:07,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:34:07,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:34:07,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:34:07,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:34:07,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:34:07,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:34:07,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:34:07,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:34:07,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:34:07,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:34:07,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:34:07,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:34:07,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:34:07,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:34:07,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:34:07,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:34:07,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:34:07,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:34:07,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:34:07,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:34:07,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:34:07,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:34:07,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:34:07,700 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:34:07,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:34:07,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:34:07,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:34:07,703 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:34:07,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:34:07,703 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:34:07,704 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:34:07,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:34:07,704 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:34:07,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:34:07,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:34:07,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:34:07,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:34:07,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:34:07,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:34:07,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:34:07,708 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:34:07,708 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:34:07,708 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:34:07,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:34:07,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:34:07,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:34:07,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:34:07,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:34:07,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:34:07,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:34:07,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:07,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:34:07,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:34:07,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:34:07,711 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:34:07,712 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:07,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:34:07,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:34:07,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:34:07,713 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-19 13:34:08,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:34:08,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:34:08,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:34:08,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:34:08,114 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:34:08,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-19 13:34:08,199 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/c16405c7a/9dbcae5d2c4445eb905b70a7b65f174c/FLAG58b31b79a [2021-11-19 13:34:08,969 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:34:08,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-19 13:34:08,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/c16405c7a/9dbcae5d2c4445eb905b70a7b65f174c/FLAG58b31b79a [2021-11-19 13:34:09,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/data/c16405c7a/9dbcae5d2c4445eb905b70a7b65f174c [2021-11-19 13:34:09,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:34:09,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:34:09,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:09,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:34:09,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:34:09,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:09" (1/1) ... [2021-11-19 13:34:09,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4bba83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:09, skipping insertion in model container [2021-11-19 13:34:09,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:09" (1/1) ... [2021-11-19 13:34:09,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:34:09,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:34:09,747 WARN L230 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_4345a559-dfcb-4897-873c-3c98a166fdb0/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-19 13:34:09,814 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:09,833 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:34:09,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:34:09,933 WARN L230 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_4345a559-dfcb-4897-873c-3c98a166fdb0/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-19 13:34:09,952 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:09,957 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:34:10,084 WARN L230 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_4345a559-dfcb-4897-873c-3c98a166fdb0/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-19 13:34:10,102 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:10,141 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:34:10,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10 WrapperNode [2021-11-19 13:34:10,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:10,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:34:10,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:34:10,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:34:10,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,253 INFO L137 Inliner]: procedures = 92, calls = 338, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 767 [2021-11-19 13:34:10,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:34:10,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:34:10,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:34:10,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:34:10,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:34:10,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:34:10,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:34:10,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:34:10,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (1/1) ... [2021-11-19 13:34:10,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:34:10,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:34:10,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:34:10,448 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:34:10,448 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:34:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:34:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 13:34:10,449 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 13:34:10,450 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:34:10,450 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:34:10,450 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-19 13:34:10,451 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-19 13:34:10,451 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:34:10,451 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:34:10,451 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:34:10,451 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:34:10,451 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:34:10,452 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:34:10,452 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:34:10,452 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:34:10,452 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:34:10,452 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:34:10,452 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:34:10,453 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:34:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:34:10,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:34:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:34:10,454 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:34:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:34:10,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:34:10,455 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:34:10,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:34:10,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:34:10,456 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:34:10,456 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:34:10,456 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:34:10,456 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:34:10,456 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:34:10,457 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:34:10,457 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:34:10,457 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:34:10,457 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:34:10,458 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:34:10,458 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:34:10,458 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:34:10,458 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:34:10,458 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:34:10,459 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:34:10,459 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:34:10,459 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:34:10,460 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:34:10,460 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:34:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:34:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:34:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:34:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:34:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:34:10,653 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:34:10,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:34:11,976 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:34:11,997 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:34:11,997 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 13:34:12,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:34:12 BoogieIcfgContainer [2021-11-19 13:34:12,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:34:12,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:34:12,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:34:12,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:34:12,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:34:09" (1/3) ... [2021-11-19 13:34:12,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f59ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:34:12, skipping insertion in model container [2021-11-19 13:34:12,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:10" (2/3) ... [2021-11-19 13:34:12,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f59ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:34:12, skipping insertion in model container [2021-11-19 13:34:12,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:34:12" (3/3) ... [2021-11-19 13:34:12,010 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2021-11-19 13:34:12,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:34:12,016 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:34:12,091 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:34:12,105 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:34:12,105 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:34:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 592 states, 465 states have (on average 1.6924731182795698) internal successors, (787), 483 states have internal predecessors, (787), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:34:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:34:12,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:12,200 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:12,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -525274672, now seen corresponding path program 1 times [2021-11-19 13:34:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:12,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470592542] [2021-11-19 13:34:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:12,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:12,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:12,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:34:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:12,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:34:12,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:34:13,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470592542] [2021-11-19 13:34:13,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470592542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:13,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:13,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:34:13,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248999970] [2021-11-19 13:34:13,242 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:13,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:34:13,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:13,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:34:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:34:13,285 INFO L87 Difference]: Start difference. First operand has 592 states, 465 states have (on average 1.6924731182795698) internal successors, (787), 483 states have internal predecessors, (787), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-19 13:34:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:13,435 INFO L93 Difference]: Finished difference Result 1162 states and 1957 transitions. [2021-11-19 13:34:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:34:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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 [2021-11-19 13:34:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:13,470 INFO L225 Difference]: With dead ends: 1162 [2021-11-19 13:34:13,470 INFO L226 Difference]: Without dead ends: 582 [2021-11-19 13:34:13,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:34:13,488 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:13,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-19 13:34:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-19 13:34:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 458 states have (on average 1.6746724890829694) internal successors, (767), 474 states have internal predecessors, (767), 100 states have call successors, (100), 25 states have call predecessors, (100), 23 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:34:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 964 transitions. [2021-11-19 13:34:13,626 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 964 transitions. Word has length 114 [2021-11-19 13:34:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:13,628 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 964 transitions. [2021-11-19 13:34:13,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-19 13:34:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 964 transitions. [2021-11-19 13:34:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:34:13,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:13,649 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:13,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:34:13,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:13,850 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash 281689968, now seen corresponding path program 1 times [2021-11-19 13:34:13,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:13,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184016805] [2021-11-19 13:34:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:13,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:13,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:13,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:34:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:34:14,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:34:14,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:34:14,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:14,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184016805] [2021-11-19 13:34:14,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184016805] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:14,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:14,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:34:14,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756352545] [2021-11-19 13:34:14,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:14,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:34:14,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:34:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:34:14,833 INFO L87 Difference]: Start difference. First operand 582 states and 964 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:34:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:14,987 INFO L93 Difference]: Finished difference Result 1160 states and 1928 transitions. [2021-11-19 13:34:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2021-11-19 13:34:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:14,995 INFO L225 Difference]: With dead ends: 1160 [2021-11-19 13:34:14,995 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 13:34:14,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:15,000 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 15 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:15,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2838 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 13:34:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 13:34:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 477 states have internal predecessors, (770), 100 states have call successors, (100), 26 states have call predecessors, (100), 24 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:34:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 967 transitions. [2021-11-19 13:34:15,064 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 967 transitions. Word has length 114 [2021-11-19 13:34:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:15,065 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 967 transitions. [2021-11-19 13:34:15,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:34:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 967 transitions. [2021-11-19 13:34:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 13:34:15,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:15,075 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:15,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:15,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:15,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:15,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1996051294, now seen corresponding path program 1 times [2021-11-19 13:34:15,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:15,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354401532] [2021-11-19 13:34:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:15,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:15,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:15,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:34:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:15,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:16,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:16,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354401532] [2021-11-19 13:34:16,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354401532] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:16,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:16,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:34:16,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048233365] [2021-11-19 13:34:16,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:16,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:16,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:34:16,360 INFO L87 Difference]: Start difference. First operand 586 states and 967 transitions. Second operand has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:16,661 INFO L93 Difference]: Finished difference Result 1184 states and 1959 transitions. [2021-11-19 13:34:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2021-11-19 13:34:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:16,668 INFO L225 Difference]: With dead ends: 1184 [2021-11-19 13:34:16,669 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 13:34:16,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:16,673 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 119 mSDsluCounter, 4701 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5663 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:16,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5663 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 13:34:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 599. [2021-11-19 13:34:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 489 states have internal predecessors, (785), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-19 13:34:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2021-11-19 13:34:16,712 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 116 [2021-11-19 13:34:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:16,713 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2021-11-19 13:34:16,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2021-11-19 13:34:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:34:16,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:16,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:16,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:16,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:16,936 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1453039279, now seen corresponding path program 1 times [2021-11-19 13:34:16,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:16,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514685972] [2021-11-19 13:34:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:16,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:16,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:16,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:16,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:34:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:17,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:18,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:18,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514685972] [2021-11-19 13:34:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514685972] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:18,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:18,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:34:18,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686162427] [2021-11-19 13:34:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:18,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:18,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:34:18,013 INFO L87 Difference]: Start difference. First operand 599 states and 989 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:18,364 INFO L93 Difference]: Finished difference Result 1204 states and 1992 transitions. [2021-11-19 13:34:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-11-19 13:34:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:18,373 INFO L225 Difference]: With dead ends: 1204 [2021-11-19 13:34:18,373 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 13:34:18,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:18,387 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 105 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5677 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:18,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5677 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:34:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 13:34:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 599. [2021-11-19 13:34:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 489 states have internal predecessors, (785), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-19 13:34:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2021-11-19 13:34:18,427 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 117 [2021-11-19 13:34:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:18,428 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2021-11-19 13:34:18,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2021-11-19 13:34:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:34:18,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:18,434 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:18,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:18,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:18,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 819662083, now seen corresponding path program 1 times [2021-11-19 13:34:18,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:18,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425117562] [2021-11-19 13:34:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:18,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:18,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:18,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:18,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:34:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:34:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:34:19,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:34:19,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:19,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425117562] [2021-11-19 13:34:19,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425117562] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:19,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:19,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 13:34:19,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752573052] [2021-11-19 13:34:19,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:19,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:34:19,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:34:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:19,546 INFO L87 Difference]: Start difference. First operand 599 states and 989 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:34:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:19,635 INFO L93 Difference]: Finished difference Result 1189 states and 1967 transitions. [2021-11-19 13:34:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:19,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-19 13:34:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:19,641 INFO L225 Difference]: With dead ends: 1189 [2021-11-19 13:34:19,641 INFO L226 Difference]: Without dead ends: 600 [2021-11-19 13:34:19,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:34:19,646 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 22 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:19,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2838 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-19 13:34:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2021-11-19 13:34:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 473 states have (on average 1.6659619450317125) internal successors, (788), 490 states have internal predecessors, (788), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-19 13:34:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 987 transitions. [2021-11-19 13:34:19,674 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 987 transitions. Word has length 117 [2021-11-19 13:34:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:19,674 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 987 transitions. [2021-11-19 13:34:19,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:34:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 987 transitions. [2021-11-19 13:34:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 13:34:19,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:19,680 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:19,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 13:34:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:19,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1805408949, now seen corresponding path program 1 times [2021-11-19 13:34:19,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:19,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841493730] [2021-11-19 13:34:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:19,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:19,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:19,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:34:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:20,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:20,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:20,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841493730] [2021-11-19 13:34:20,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841493730] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:20,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:20,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:34:20,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636335337] [2021-11-19 13:34:20,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:20,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:20,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:34:20,936 INFO L87 Difference]: Start difference. First operand 600 states and 987 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:21,203 INFO L93 Difference]: Finished difference Result 1194 states and 1972 transitions. [2021-11-19 13:34:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:21,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2021-11-19 13:34:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:21,213 INFO L225 Difference]: With dead ends: 1194 [2021-11-19 13:34:21,213 INFO L226 Difference]: Without dead ends: 609 [2021-11-19 13:34:21,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:21,221 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 104 mSDsluCounter, 4675 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5637 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:21,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5637 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-19 13:34:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 600. [2021-11-19 13:34:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 473 states have (on average 1.6659619450317125) internal successors, (788), 490 states have internal predecessors, (788), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-19 13:34:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 987 transitions. [2021-11-19 13:34:21,251 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 987 transitions. Word has length 119 [2021-11-19 13:34:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:21,253 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 987 transitions. [2021-11-19 13:34:21,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 987 transitions. [2021-11-19 13:34:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:34:21,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:21,259 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:21,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:21,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:21,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1570987814, now seen corresponding path program 1 times [2021-11-19 13:34:21,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:21,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625811364] [2021-11-19 13:34:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:21,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:21,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:21,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:34:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:21,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:34:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:22,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:22,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:22,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625811364] [2021-11-19 13:34:22,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625811364] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:22,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:22,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:34:22,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868877077] [2021-11-19 13:34:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:22,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:34:22,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:34:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:34:22,405 INFO L87 Difference]: Start difference. First operand 600 states and 987 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:34:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:22,621 INFO L93 Difference]: Finished difference Result 1214 states and 2010 transitions. [2021-11-19 13:34:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-19 13:34:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:22,628 INFO L225 Difference]: With dead ends: 1214 [2021-11-19 13:34:22,628 INFO L226 Difference]: Without dead ends: 629 [2021-11-19 13:34:22,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:22,633 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 112 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:22,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2682 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-19 13:34:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 620. [2021-11-19 13:34:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 492 states have (on average 1.660569105691057) internal successors, (817), 509 states have internal predecessors, (817), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 13:34:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1015 transitions. [2021-11-19 13:34:22,662 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1015 transitions. Word has length 120 [2021-11-19 13:34:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:22,663 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1015 transitions. [2021-11-19 13:34:22,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:34:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1015 transitions. [2021-11-19 13:34:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 13:34:22,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:22,669 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:22,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:22,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:22,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash 916608113, now seen corresponding path program 1 times [2021-11-19 13:34:22,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:22,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351095836] [2021-11-19 13:34:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:22,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:22,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:22,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:34:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:23,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:23,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:23,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351095836] [2021-11-19 13:34:23,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351095836] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:23,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:23,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 13:34:23,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33360394] [2021-11-19 13:34:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:23,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:23,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:34:23,896 INFO L87 Difference]: Start difference. First operand 620 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:24,112 INFO L93 Difference]: Finished difference Result 1243 states and 2041 transitions. [2021-11-19 13:34:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 121 [2021-11-19 13:34:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:24,121 INFO L225 Difference]: With dead ends: 1243 [2021-11-19 13:34:24,121 INFO L226 Difference]: Without dead ends: 638 [2021-11-19 13:34:24,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:24,127 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 154 mSDsluCounter, 4603 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5553 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:24,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5553 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-19 13:34:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 620. [2021-11-19 13:34:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 492 states have (on average 1.660569105691057) internal successors, (817), 509 states have internal predecessors, (817), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 13:34:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1015 transitions. [2021-11-19 13:34:24,155 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1015 transitions. Word has length 121 [2021-11-19 13:34:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:24,156 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1015 transitions. [2021-11-19 13:34:24,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1015 transitions. [2021-11-19 13:34:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 13:34:24,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:24,162 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:24,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:24,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:24,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1014266940, now seen corresponding path program 1 times [2021-11-19 13:34:24,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:24,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467666808] [2021-11-19 13:34:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:24,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:24,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:24,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:34:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:24,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:24,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:25,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:25,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:25,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467666808] [2021-11-19 13:34:25,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467666808] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:25,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:25,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:34:25,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696119193] [2021-11-19 13:34:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:25,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:34:25,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:25,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:34:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:25,441 INFO L87 Difference]: Start difference. First operand 620 states and 1015 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:25,733 INFO L93 Difference]: Finished difference Result 1238 states and 2032 transitions. [2021-11-19 13:34:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:34:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 122 [2021-11-19 13:34:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:25,741 INFO L225 Difference]: With dead ends: 1238 [2021-11-19 13:34:25,741 INFO L226 Difference]: Without dead ends: 633 [2021-11-19 13:34:25,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:34:25,760 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 112 mSDsluCounter, 5533 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6473 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:25,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6473 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-19 13:34:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 624. [2021-11-19 13:34:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 496 states have (on average 1.655241935483871) internal successors, (821), 513 states have internal predecessors, (821), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 13:34:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1019 transitions. [2021-11-19 13:34:25,787 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1019 transitions. Word has length 122 [2021-11-19 13:34:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:25,788 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1019 transitions. [2021-11-19 13:34:25,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1019 transitions. [2021-11-19 13:34:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 13:34:25,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:25,795 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:25,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:26,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:26,015 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1179636911, now seen corresponding path program 1 times [2021-11-19 13:34:26,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:26,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649721418] [2021-11-19 13:34:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:26,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:26,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:26,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:26,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:34:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:26,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:27,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:27,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649721418] [2021-11-19 13:34:27,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649721418] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:27,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:27,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:34:27,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753004850] [2021-11-19 13:34:27,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:27,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:34:27,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:34:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:27,083 INFO L87 Difference]: Start difference. First operand 624 states and 1019 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:27,449 INFO L93 Difference]: Finished difference Result 1248 states and 2044 transitions. [2021-11-19 13:34:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:34:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2021-11-19 13:34:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:27,455 INFO L225 Difference]: With dead ends: 1248 [2021-11-19 13:34:27,456 INFO L226 Difference]: Without dead ends: 639 [2021-11-19 13:34:27,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:34:27,460 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 108 mSDsluCounter, 5539 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6481 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:27,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6481 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:34:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-19 13:34:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 630. [2021-11-19 13:34:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 502 states have (on average 1.6474103585657371) internal successors, (827), 519 states have internal predecessors, (827), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 13:34:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1025 transitions. [2021-11-19 13:34:27,492 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1025 transitions. Word has length 123 [2021-11-19 13:34:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:27,492 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1025 transitions. [2021-11-19 13:34:27,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1025 transitions. [2021-11-19 13:34:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 13:34:27,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:27,498 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:27,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:27,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:27,720 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 566463529, now seen corresponding path program 1 times [2021-11-19 13:34:27,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:27,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432195067] [2021-11-19 13:34:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:27,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:27,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:27,722 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:27,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:34:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:28,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:34:28,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:28,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:28,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432195067] [2021-11-19 13:34:28,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432195067] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:28,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:28,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:34:28,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074936599] [2021-11-19 13:34:28,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:28,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:34:28,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:28,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:34:28,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:28,704 INFO L87 Difference]: Start difference. First operand 630 states and 1025 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:29,019 INFO L93 Difference]: Finished difference Result 1262 states and 2060 transitions. [2021-11-19 13:34:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:34:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 124 [2021-11-19 13:34:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:29,026 INFO L225 Difference]: With dead ends: 1262 [2021-11-19 13:34:29,026 INFO L226 Difference]: Without dead ends: 647 [2021-11-19 13:34:29,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:34:29,031 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 108 mSDsluCounter, 5539 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6481 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:29,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6481 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:34:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-19 13:34:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 638. [2021-11-19 13:34:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 510 states have (on average 1.6372549019607843) internal successors, (835), 527 states have internal predecessors, (835), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 13:34:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1033 transitions. [2021-11-19 13:34:29,058 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1033 transitions. Word has length 124 [2021-11-19 13:34:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:29,058 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1033 transitions. [2021-11-19 13:34:29,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:34:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1033 transitions. [2021-11-19 13:34:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:34:29,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:29,064 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:29,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:29,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:29,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1438604566, now seen corresponding path program 1 times [2021-11-19 13:34:29,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:29,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349145309] [2021-11-19 13:34:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:29,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:29,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:29,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:34:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:29,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:30,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:30,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349145309] [2021-11-19 13:34:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349145309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:30,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:30,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:34:30,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816184227] [2021-11-19 13:34:30,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:30,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:34:30,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:34:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:34:30,188 INFO L87 Difference]: Start difference. First operand 638 states and 1033 transitions. Second operand has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:34:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:30,482 INFO L93 Difference]: Finished difference Result 1201 states and 1944 transitions. [2021-11-19 13:34:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:34:30,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 125 [2021-11-19 13:34:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:30,489 INFO L225 Difference]: With dead ends: 1201 [2021-11-19 13:34:30,489 INFO L226 Difference]: Without dead ends: 656 [2021-11-19 13:34:30,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:30,494 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 186 mSDsluCounter, 6616 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 7566 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:30,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 7566 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-19 13:34:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 645. [2021-11-19 13:34:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 514 states have (on average 1.632295719844358) internal successors, (839), 533 states have internal predecessors, (839), 101 states have call successors, (101), 28 states have call predecessors, (101), 29 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2021-11-19 13:34:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1042 transitions. [2021-11-19 13:34:30,522 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1042 transitions. Word has length 125 [2021-11-19 13:34:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:30,523 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1042 transitions. [2021-11-19 13:34:30,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:34:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1042 transitions. [2021-11-19 13:34:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:34:30,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:30,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:30,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 13:34:30,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:30,744 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1493422036, now seen corresponding path program 1 times [2021-11-19 13:34:30,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:30,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603546482] [2021-11-19 13:34:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:30,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:30,746 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:30,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:34:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:31,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:31,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:31,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603546482] [2021-11-19 13:34:31,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603546482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:31,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:31,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:34:31,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834050911] [2021-11-19 13:34:31,625 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:31,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:34:31,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:34:31,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:34:31,627 INFO L87 Difference]: Start difference. First operand 645 states and 1042 transitions. Second operand has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:34:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:31,904 INFO L93 Difference]: Finished difference Result 1204 states and 1947 transitions. [2021-11-19 13:34:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:34:31,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 127 [2021-11-19 13:34:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:31,914 INFO L225 Difference]: With dead ends: 1204 [2021-11-19 13:34:31,914 INFO L226 Difference]: Without dead ends: 659 [2021-11-19 13:34:31,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:31,921 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 180 mSDsluCounter, 5685 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 6637 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:31,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 6637 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-19 13:34:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 652. [2021-11-19 13:34:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 518 states have (on average 1.6274131274131274) internal successors, (843), 539 states have internal predecessors, (843), 102 states have call successors, (102), 28 states have call predecessors, (102), 31 states have return successors, (106), 97 states have call predecessors, (106), 99 states have call successors, (106) [2021-11-19 13:34:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1051 transitions. [2021-11-19 13:34:31,952 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1051 transitions. Word has length 127 [2021-11-19 13:34:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:31,952 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1051 transitions. [2021-11-19 13:34:31,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:34:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1051 transitions. [2021-11-19 13:34:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:34:31,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:31,958 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:31,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:32,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:32,176 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1685221104, now seen corresponding path program 1 times [2021-11-19 13:34:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:32,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001512678] [2021-11-19 13:34:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:32,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:32,177 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:32,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:34:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:32,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:32,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:33,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:33,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001512678] [2021-11-19 13:34:33,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001512678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:33,163 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:33,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:34:33,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514866577] [2021-11-19 13:34:33,163 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:33,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:34:33,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:34:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:34:33,165 INFO L87 Difference]: Start difference. First operand 652 states and 1051 transitions. Second operand has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:34:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:33,387 INFO L93 Difference]: Finished difference Result 1205 states and 1948 transitions. [2021-11-19 13:34:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 127 [2021-11-19 13:34:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:33,393 INFO L225 Difference]: With dead ends: 1205 [2021-11-19 13:34:33,393 INFO L226 Difference]: Without dead ends: 660 [2021-11-19 13:34:33,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:33,398 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 145 mSDsluCounter, 5497 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6451 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:33,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 6451 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-19 13:34:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 655. [2021-11-19 13:34:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 520 states have (on average 1.625) internal successors, (845), 542 states have internal predecessors, (845), 102 states have call successors, (102), 28 states have call predecessors, (102), 32 states have return successors, (107), 97 states have call predecessors, (107), 99 states have call successors, (107) [2021-11-19 13:34:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1054 transitions. [2021-11-19 13:34:33,425 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1054 transitions. Word has length 127 [2021-11-19 13:34:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1054 transitions. [2021-11-19 13:34:33,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:34:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1054 transitions. [2021-11-19 13:34:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:34:33,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:33,431 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:33,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 13:34:33,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:33,649 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 326508722, now seen corresponding path program 1 times [2021-11-19 13:34:33,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:33,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319712298] [2021-11-19 13:34:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:33,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:33,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:33,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:34:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:34:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:34:34,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:34:34,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:34,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319712298] [2021-11-19 13:34:34,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319712298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:34,398 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:34,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:34:34,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151289261] [2021-11-19 13:34:34,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:34,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:34,400 INFO L87 Difference]: Start difference. First operand 655 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:34:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:34,466 INFO L93 Difference]: Finished difference Result 1275 states and 2056 transitions. [2021-11-19 13:34:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 127 [2021-11-19 13:34:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:34,470 INFO L225 Difference]: With dead ends: 1275 [2021-11-19 13:34:34,470 INFO L226 Difference]: Without dead ends: 605 [2021-11-19 13:34:34,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:34:34,474 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 30 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2837 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:34,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2837 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-19 13:34:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-19 13:34:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 477 states have (on average 1.6079664570230607) internal successors, (767), 494 states have internal predecessors, (767), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:34:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 964 transitions. [2021-11-19 13:34:34,499 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 964 transitions. Word has length 127 [2021-11-19 13:34:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:34,500 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 964 transitions. [2021-11-19 13:34:34,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:34:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 964 transitions. [2021-11-19 13:34:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:34:34,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:34,504 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:34,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:34,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:34,722 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1682333171, now seen corresponding path program 1 times [2021-11-19 13:34:34,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:34,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371680823] [2021-11-19 13:34:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:34,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:34,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:34:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:34:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:35,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:35,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:35,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371680823] [2021-11-19 13:34:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371680823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:35,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:35,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:34:35,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121970119] [2021-11-19 13:34:35,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:35,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:34:35,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:34:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:34:35,471 INFO L87 Difference]: Start difference. First operand 605 states and 964 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:34:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:35,656 INFO L93 Difference]: Finished difference Result 1236 states and 1961 transitions. [2021-11-19 13:34:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 129 [2021-11-19 13:34:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:35,661 INFO L225 Difference]: With dead ends: 1236 [2021-11-19 13:34:35,661 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 13:34:35,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:34:35,665 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 120 mSDsluCounter, 3512 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:35,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 4405 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 13:34:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-19 13:34:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 474 states have (on average 1.5864978902953586) internal successors, (752), 490 states have internal predecessors, (752), 100 states have call successors, (100), 29 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:34:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 949 transitions. [2021-11-19 13:34:35,689 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 949 transitions. Word has length 129 [2021-11-19 13:34:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:35,690 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 949 transitions. [2021-11-19 13:34:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:34:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 949 transitions. [2021-11-19 13:34:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:34:35,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:35,695 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:35,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:35,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:35,913 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:35,913 INFO L85 PathProgramCache]: Analyzing trace with hash -559226990, now seen corresponding path program 1 times [2021-11-19 13:34:35,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:35,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217075091] [2021-11-19 13:34:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:35,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:35,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:35,914 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:35,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:34:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:34:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:34:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:34:37,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:37,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217075091] [2021-11-19 13:34:37,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217075091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:37,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:37,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-19 13:34:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156770167] [2021-11-19 13:34:37,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:37,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:34:37,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:34:37,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:34:37,566 INFO L87 Difference]: Start difference. First operand 602 states and 949 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:34:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:40,719 INFO L93 Difference]: Finished difference Result 1807 states and 2942 transitions. [2021-11-19 13:34:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:40,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 130 [2021-11-19 13:34:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:40,730 INFO L225 Difference]: With dead ends: 1807 [2021-11-19 13:34:40,730 INFO L226 Difference]: Without dead ends: 1266 [2021-11-19 13:34:40,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:40,735 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 1801 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:40,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1847 Valid, 2876 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 13:34:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-11-19 13:34:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1163. [2021-11-19 13:34:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 919 states have (on average 1.6126224156692057) internal successors, (1482), 947 states have internal predecessors, (1482), 197 states have call successors, (197), 48 states have call predecessors, (197), 46 states have return successors, (202), 182 states have call predecessors, (202), 193 states have call successors, (202) [2021-11-19 13:34:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1881 transitions. [2021-11-19 13:34:40,793 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1881 transitions. Word has length 130 [2021-11-19 13:34:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1881 transitions. [2021-11-19 13:34:40,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:34:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1881 transitions. [2021-11-19 13:34:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:34:40,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:40,799 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:40,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:41,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:41,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 133105036, now seen corresponding path program 1 times [2021-11-19 13:34:41,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:41,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289329034] [2021-11-19 13:34:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:41,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:41,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:41,019 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:41,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:34:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:34:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:34:41,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:34:42,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:42,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289329034] [2021-11-19 13:34:42,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289329034] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:42,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:42,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-19 13:34:42,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251512203] [2021-11-19 13:34:42,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:42,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:42,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:42,245 INFO L87 Difference]: Start difference. First operand 1163 states and 1881 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:34:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:45,790 INFO L93 Difference]: Finished difference Result 3919 states and 6607 transitions. [2021-11-19 13:34:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:34:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 131 [2021-11-19 13:34:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:45,817 INFO L225 Difference]: With dead ends: 3919 [2021-11-19 13:34:45,817 INFO L226 Difference]: Without dead ends: 2817 [2021-11-19 13:34:45,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:45,828 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 2491 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2598 SdHoareTripleChecker+Valid, 4522 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:45,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2598 Valid, 4522 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 13:34:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-11-19 13:34:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2193. [2021-11-19 13:34:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 1729 states have (on average 1.6367842683632157) internal successors, (2830), 1785 states have internal predecessors, (2830), 376 states have call successors, (376), 84 states have call predecessors, (376), 87 states have return successors, (444), 353 states have call predecessors, (444), 370 states have call successors, (444) [2021-11-19 13:34:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3650 transitions. [2021-11-19 13:34:45,960 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3650 transitions. Word has length 131 [2021-11-19 13:34:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:45,961 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 3650 transitions. [2021-11-19 13:34:45,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:34:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3650 transitions. [2021-11-19 13:34:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:34:45,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:45,966 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:45,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:46,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:46,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1132247174, now seen corresponding path program 1 times [2021-11-19 13:34:46,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:46,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992724493] [2021-11-19 13:34:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:46,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:46,187 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:46,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:34:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:46,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:46,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:34:46,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:34:47,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:47,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992724493] [2021-11-19 13:34:47,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992724493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:47,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:47,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-19 13:34:47,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102686089] [2021-11-19 13:34:47,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:47,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:47,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:47,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:47,157 INFO L87 Difference]: Start difference. First operand 2193 states and 3650 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:34:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:49,349 INFO L93 Difference]: Finished difference Result 7218 states and 12383 transitions. [2021-11-19 13:34:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:34:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 132 [2021-11-19 13:34:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:49,393 INFO L225 Difference]: With dead ends: 7218 [2021-11-19 13:34:49,393 INFO L226 Difference]: Without dead ends: 5086 [2021-11-19 13:34:49,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:34:49,414 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 1039 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 4827 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:49,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 4827 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:34:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-11-19 13:34:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 4812. [2021-11-19 13:34:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4812 states, 3675 states have (on average 1.606530612244898) internal successors, (5904), 3833 states have internal predecessors, (5904), 955 states have call successors, (955), 170 states have call predecessors, (955), 181 states have return successors, (1189), 888 states have call predecessors, (1189), 945 states have call successors, (1189) [2021-11-19 13:34:49,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4812 states to 4812 states and 8048 transitions. [2021-11-19 13:34:49,758 INFO L78 Accepts]: Start accepts. Automaton has 4812 states and 8048 transitions. Word has length 132 [2021-11-19 13:34:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:49,759 INFO L470 AbstractCegarLoop]: Abstraction has 4812 states and 8048 transitions. [2021-11-19 13:34:49,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:34:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4812 states and 8048 transitions. [2021-11-19 13:34:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 13:34:49,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:49,764 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:49,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:49,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:49,982 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash 532665384, now seen corresponding path program 1 times [2021-11-19 13:34:49,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:49,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365694888] [2021-11-19 13:34:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:49,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:49,984 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:49,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:34:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:34:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:34:50,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:34:50,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:50,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365694888] [2021-11-19 13:34:50,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365694888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:50,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:50,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 7 [2021-11-19 13:34:50,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996540895] [2021-11-19 13:34:50,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:50,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:50,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:50,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:50,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:50,863 INFO L87 Difference]: Start difference. First operand 4812 states and 8048 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 13:34:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:52,912 INFO L93 Difference]: Finished difference Result 15446 states and 27397 transitions. [2021-11-19 13:34:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:34:52,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2021-11-19 13:34:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:53,004 INFO L225 Difference]: With dead ends: 15446 [2021-11-19 13:34:53,004 INFO L226 Difference]: Without dead ends: 10695 [2021-11-19 13:34:53,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:53,039 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 1209 mSDsluCounter, 5080 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 6290 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:53,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 6290 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:34:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-11-19 13:34:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 7855. [2021-11-19 13:34:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7855 states, 5946 states have (on average 1.591490077362933) internal successors, (9463), 6204 states have internal predecessors, (9463), 1614 states have call successors, (1614), 260 states have call predecessors, (1614), 294 states have return successors, (2260), 1546 states have call predecessors, (2260), 1600 states have call successors, (2260) [2021-11-19 13:34:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7855 states to 7855 states and 13337 transitions. [2021-11-19 13:34:53,733 INFO L78 Accepts]: Start accepts. Automaton has 7855 states and 13337 transitions. Word has length 138 [2021-11-19 13:34:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:53,733 INFO L470 AbstractCegarLoop]: Abstraction has 7855 states and 13337 transitions. [2021-11-19 13:34:53,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 13:34:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7855 states and 13337 transitions. [2021-11-19 13:34:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:34:53,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:53,739 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:53,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:53,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:53,951 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash 981219907, now seen corresponding path program 1 times [2021-11-19 13:34:53,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:53,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176737467] [2021-11-19 13:34:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:53,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:53,953 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:53,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:34:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:34:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:34:54,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:34:54,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:54,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176737467] [2021-11-19 13:34:54,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176737467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:54,839 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:54,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:34:54,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528451209] [2021-11-19 13:34:54,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:54,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:34:54,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:34:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:34:54,841 INFO L87 Difference]: Start difference. First operand 7855 states and 13337 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:34:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:56,222 INFO L93 Difference]: Finished difference Result 21313 states and 37720 transitions. [2021-11-19 13:34:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:34:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 139 [2021-11-19 13:34:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:56,311 INFO L225 Difference]: With dead ends: 21313 [2021-11-19 13:34:56,311 INFO L226 Difference]: Without dead ends: 13519 [2021-11-19 13:34:56,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:34:56,370 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 1668 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:56,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 3088 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:34:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13519 states. [2021-11-19 13:34:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13519 to 13515. [2021-11-19 13:34:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13515 states, 10172 states have (on average 1.5818914667715296) internal successors, (16091), 10636 states have internal predecessors, (16091), 2840 states have call successors, (2840), 440 states have call predecessors, (2840), 502 states have return successors, (4353), 2746 states have call predecessors, (4353), 2818 states have call successors, (4353) [2021-11-19 13:34:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13515 states to 13515 states and 23284 transitions. [2021-11-19 13:34:57,201 INFO L78 Accepts]: Start accepts. Automaton has 13515 states and 23284 transitions. Word has length 139 [2021-11-19 13:34:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:57,202 INFO L470 AbstractCegarLoop]: Abstraction has 13515 states and 23284 transitions. [2021-11-19 13:34:57,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:34:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13515 states and 23284 transitions. [2021-11-19 13:34:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:34:57,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:57,206 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:57,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:57,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:57,426 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 365078501, now seen corresponding path program 1 times [2021-11-19 13:34:57,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:57,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885180570] [2021-11-19 13:34:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:57,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:57,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:57,429 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:57,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:34:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:34:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:34:58,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:34:58,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:58,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885180570] [2021-11-19 13:34:58,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885180570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:58,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:58,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:34:58,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891928368] [2021-11-19 13:34:58,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:58,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:34:58,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:58,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:34:58,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:34:58,519 INFO L87 Difference]: Start difference. First operand 13515 states and 23284 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:35:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:00,568 INFO L93 Difference]: Finished difference Result 38313 states and 69614 transitions. [2021-11-19 13:35:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:35:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 140 [2021-11-19 13:35:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:00,728 INFO L225 Difference]: With dead ends: 38313 [2021-11-19 13:35:00,728 INFO L226 Difference]: Without dead ends: 24859 [2021-11-19 13:35:00,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:00,839 INFO L933 BasicCegarLoop]: 1751 mSDtfsCounter, 1676 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 3104 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:00,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 3104 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:35:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24859 states. [2021-11-19 13:35:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24859 to 24855. [2021-11-19 13:35:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24855 states, 18640 states have (on average 1.574087982832618) internal successors, (29341), 19516 states have internal predecessors, (29341), 5296 states have call successors, (5296), 800 states have call predecessors, (5296), 918 states have return successors, (9122), 5150 states have call predecessors, (9122), 5258 states have call successors, (9122) [2021-11-19 13:35:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24855 states to 24855 states and 43759 transitions. [2021-11-19 13:35:02,611 INFO L78 Accepts]: Start accepts. Automaton has 24855 states and 43759 transitions. Word has length 140 [2021-11-19 13:35:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:02,612 INFO L470 AbstractCegarLoop]: Abstraction has 24855 states and 43759 transitions. [2021-11-19 13:35:02,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:35:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 24855 states and 43759 transitions. [2021-11-19 13:35:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 13:35:02,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:02,616 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:02,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 13:35:02,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:02,824 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1536830750, now seen corresponding path program 1 times [2021-11-19 13:35:02,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:02,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913267739] [2021-11-19 13:35:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:02,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:02,826 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:02,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:35:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:35:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:35:03,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:35:03,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:03,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913267739] [2021-11-19 13:35:03,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913267739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:03,583 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:03,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:35:03,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193728580] [2021-11-19 13:35:03,584 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:03,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:35:03,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:03,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:35:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:03,585 INFO L87 Difference]: Start difference. First operand 24855 states and 43759 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:35:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:07,387 INFO L93 Difference]: Finished difference Result 72353 states and 136714 transitions. [2021-11-19 13:35:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:35:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 141 [2021-11-19 13:35:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:07,668 INFO L225 Difference]: With dead ends: 72353 [2021-11-19 13:35:07,668 INFO L226 Difference]: Without dead ends: 47559 [2021-11-19 13:35:08,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:08,101 INFO L933 BasicCegarLoop]: 1760 mSDtfsCounter, 1684 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:08,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 3120 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 13:35:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47559 states. [2021-11-19 13:35:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47559 to 47555. [2021-11-19 13:35:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47555 states, 35592 states have (on average 1.5671780175320296) internal successors, (55779), 37292 states have internal predecessors, (55779), 10212 states have call successors, (10212), 1520 states have call predecessors, (10212), 1750 states have return successors, (20437), 9962 states have call predecessors, (20437), 10142 states have call successors, (20437) [2021-11-19 13:35:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47555 states to 47555 states and 86428 transitions. [2021-11-19 13:35:11,728 INFO L78 Accepts]: Start accepts. Automaton has 47555 states and 86428 transitions. Word has length 141 [2021-11-19 13:35:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:11,728 INFO L470 AbstractCegarLoop]: Abstraction has 47555 states and 86428 transitions. [2021-11-19 13:35:11,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:35:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 47555 states and 86428 transitions. [2021-11-19 13:35:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:35:11,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:11,734 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:11,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:11,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:11,939 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1996255840, now seen corresponding path program 1 times [2021-11-19 13:35:11,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:11,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455022232] [2021-11-19 13:35:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:11,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:11,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:11,941 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:11,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:35:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:35:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:35:12,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:35:12,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:12,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455022232] [2021-11-19 13:35:12,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455022232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:12,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:12,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:35:12,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620884685] [2021-11-19 13:35:12,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:12,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:35:12,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:12,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:35:12,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:12,779 INFO L87 Difference]: Start difference. First operand 47555 states and 86428 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:35:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:20,023 INFO L93 Difference]: Finished difference Result 140473 states and 281292 transitions. [2021-11-19 13:35:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:35:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 142 [2021-11-19 13:35:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:20,710 INFO L225 Difference]: With dead ends: 140473 [2021-11-19 13:35:20,710 INFO L226 Difference]: Without dead ends: 92979 [2021-11-19 13:35:21,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:35:21,444 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 1692 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:21,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 3136 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:35:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92979 states. [2021-11-19 13:35:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92979 to 92975. [2021-11-19 13:35:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92975 states, 69512 states have (on average 1.5606082403038324) internal successors, (108481), 72860 states have internal predecessors, (108481), 20048 states have call successors, (20048), 2960 states have call predecessors, (20048), 3414 states have return successors, (48640), 19590 states have call predecessors, (48640), 19914 states have call successors, (48640) [2021-11-19 13:35:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92975 states to 92975 states and 177169 transitions. [2021-11-19 13:35:28,641 INFO L78 Accepts]: Start accepts. Automaton has 92975 states and 177169 transitions. Word has length 142 [2021-11-19 13:35:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:28,642 INFO L470 AbstractCegarLoop]: Abstraction has 92975 states and 177169 transitions. [2021-11-19 13:35:28,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:35:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 92975 states and 177169 transitions. [2021-11-19 13:35:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:35:28,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:28,647 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:28,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:28,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:28,864 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1817631198, now seen corresponding path program 1 times [2021-11-19 13:35:28,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:28,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895642479] [2021-11-19 13:35:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:28,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:28,866 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:28,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4345a559-dfcb-4897-873c-3c98a166fdb0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:35:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:29,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:35:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:35:29,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:35:29,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:29,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895642479] [2021-11-19 13:35:29,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895642479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:29,964 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:29,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 11 [2021-11-19 13:35:29,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65617120] [2021-11-19 13:35:29,965 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:29,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:29,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:35:29,966 INFO L87 Difference]: Start difference. First operand 92975 states and 177169 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 5 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28)