./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.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_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/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_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/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_f4a8d769-8feb-4240-85c5-da42626b62cb/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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:13:58,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:13:58,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:13:58,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:13:58,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:13:58,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:13:58,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:13:58,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:13:58,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:13:58,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:13:58,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:13:58,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:13:58,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:13:58,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:13:58,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:13:58,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:13:58,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:13:58,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:13:58,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:13:58,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:13:58,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:13:58,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:13:58,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:13:58,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:13:58,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:13:58,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:13:58,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:13:58,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:13:58,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:13:58,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:13:58,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:13:58,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:13:58,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:13:58,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:13:58,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:13:58,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:13:58,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:13:58,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:13:58,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:13:58,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:13:58,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:13:58,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:13:58,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:13:58,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:13:58,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:13:58,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:13:58,315 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:13:58,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:13:58,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:13:58,317 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:13:58,317 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:13:58,318 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:13:58,318 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:13:58,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:13:58,319 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:13:58,319 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:13:58,320 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:13:58,320 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:13:58,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:13:58,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:13:58,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:13:58,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:13:58,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:13:58,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:13:58,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:13:58,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:13:58,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:13:58,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:13:58,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:13:58,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:13:58,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:13:58,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:13:58,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:13:58,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:13:58,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:13:58,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:13:58,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:13:58,327 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:13:58,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:13:58,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:13:58,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:13:58,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:13:58,329 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_f4a8d769-8feb-4240-85c5-da42626b62cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-19 14:13:58,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:13:58,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:13:58,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:13:58,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:13:58,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:13:58,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-19 14:13:58,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/9551c4fcb/1928fead00824bc289e6196a9353c84f/FLAGf86195b9d [2021-11-19 14:13:59,371 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:13:59,381 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-19 14:13:59,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/9551c4fcb/1928fead00824bc289e6196a9353c84f/FLAGf86195b9d [2021-11-19 14:13:59,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/9551c4fcb/1928fead00824bc289e6196a9353c84f [2021-11-19 14:13:59,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:13:59,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:13:59,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:13:59,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:13:59,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:13:59,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5784767f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59, skipping insertion in model container [2021-11-19 14:13:59,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:13:59,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:00,162 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_f4a8d769-8feb-4240-85c5-da42626b62cb/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-19 14:14:00,165 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:00,176 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 14:14:00,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e44fdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:00, skipping insertion in model container [2021-11-19 14:14:00,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:00,177 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:00,179 INFO L158 Benchmark]: Toolchain (without parser) took 601.19ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 62.1MB in the end (delta: 859.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:00,180 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:00,181 INFO L158 Benchmark]: CACSL2BoogieTranslator took 597.95ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 62.1MB in the end (delta: 859.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:00,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 597.95ms. Allocated memory is still 98.6MB. Free memory was 62.9MB in the beginning and 62.1MB in the end (delta: 859.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: 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_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/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_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/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_f4a8d769-8feb-4240-85c5-da42626b62cb/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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:02,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:02,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:02,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:02,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:02,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:02,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:02,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:02,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:02,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:02,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:02,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:02,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:02,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:02,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:02,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:02,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:02,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:02,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:02,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:02,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:02,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:02,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:02,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:02,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:02,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:02,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:02,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:02,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:02,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:02,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:02,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:02,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:02,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:02,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:02,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:02,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:02,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:02,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:02,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:02,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:02,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:02,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:02,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:02,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:02,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:02,685 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:02,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:02,685 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:02,685 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:02,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:02,686 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:02,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:02,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:02,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:02,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:02,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:02,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:02,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:02,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:02,690 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:02,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:02,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:02,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:02,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:02,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:02,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:02,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:02,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:02,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:02,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:02,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:02,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:02,693 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:02,694 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:02,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:02,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:02,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:02,695 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_f4a8d769-8feb-4240-85c5-da42626b62cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-19 14:14:03,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:03,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:03,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:03,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:03,141 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:03,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-19 14:14:03,230 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/050246d85/9a5d8102eb984f4bab46620231c6d810/FLAGc1d84c4bf [2021-11-19 14:14:03,942 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:03,942 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-19 14:14:03,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/050246d85/9a5d8102eb984f4bab46620231c6d810/FLAGc1d84c4bf [2021-11-19 14:14:04,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/data/050246d85/9a5d8102eb984f4bab46620231c6d810 [2021-11-19 14:14:04,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:04,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:04,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:04,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:04,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:04,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:04" (1/1) ... [2021-11-19 14:14:04,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b291042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:04, skipping insertion in model container [2021-11-19 14:14:04,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:04" (1/1) ... [2021-11-19 14:14:04,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:04,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:04,757 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_f4a8d769-8feb-4240-85c5-da42626b62cb/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-19 14:14:04,760 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:04,775 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:04,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:04,994 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_f4a8d769-8feb-4240-85c5-da42626b62cb/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-19 14:14:04,997 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:05,011 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:05,165 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_f4a8d769-8feb-4240-85c5-da42626b62cb/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-19 14:14:05,166 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:05,198 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:05,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05 WrapperNode [2021-11-19 14:14:05,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:05,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:05,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:05,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:05,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,342 INFO L137 Inliner]: procedures = 95, calls = 335, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1032 [2021-11-19 14:14:05,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:05,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:05,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:05,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:05,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:05,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:05,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:05,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:05,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:05,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:05,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:14:05,584 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:14:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:05,584 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:14:05,584 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:14:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:05,585 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:05,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:05,585 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:14:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:14:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:14:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:05,588 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:14:05,588 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:05,589 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:05,589 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:05,590 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:05,590 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-19 14:14:05,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-19 14:14:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:05,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:05,775 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:05,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:06,880 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:06,893 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:06,894 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:06,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:06 BoogieIcfgContainer [2021-11-19 14:14:06,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:06,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:06,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:06,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:06,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:04" (1/3) ... [2021-11-19 14:14:06,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e0c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:06, skipping insertion in model container [2021-11-19 14:14:06,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05" (2/3) ... [2021-11-19 14:14:06,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e0c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:06, skipping insertion in model container [2021-11-19 14:14:06,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:06" (3/3) ... [2021-11-19 14:14:06,906 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2021-11-19 14:14:06,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:06,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:06,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:06,971 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 14:14:06,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 545 states, 429 states have (on average 1.6993006993006994) internal successors, (729), 450 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 14:14:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:14:07,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:07,047 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:07,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:07,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1289670013, now seen corresponding path program 1 times [2021-11-19 14:14:07,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:07,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051466967] [2021-11-19 14:14:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:07,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:07,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:07,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:07,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:07,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:08,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:08,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051466967] [2021-11-19 14:14:08,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051466967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:08,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:08,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:08,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775680394] [2021-11-19 14:14:08,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:08,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:08,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:08,205 INFO L87 Difference]: Start difference. First operand has 545 states, 429 states have (on average 1.6993006993006994) internal successors, (729), 450 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:08,301 INFO L93 Difference]: Finished difference Result 566 states and 941 transitions. [2021-11-19 14:14:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2021-11-19 14:14:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:08,331 INFO L225 Difference]: With dead ends: 566 [2021-11-19 14:14:08,332 INFO L226 Difference]: Without dead ends: 537 [2021-11-19 14:14:08,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 206 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 14:14:08,343 INFO L933 BasicCegarLoop]: 902 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, 902 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 14:14:08,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-19 14:14:08,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-19 14:14:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6973995271867612) internal successors, (718), 442 states have internal predecessors, (718), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:14:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 895 transitions. [2021-11-19 14:14:08,465 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 895 transitions. Word has length 104 [2021-11-19 14:14:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:08,468 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 895 transitions. [2021-11-19 14:14:08,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 895 transitions. [2021-11-19 14:14:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:14:08,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:08,480 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:08,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:08,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:08,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -791622441, now seen corresponding path program 1 times [2021-11-19 14:14:08,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:08,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931123974] [2021-11-19 14:14:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:08,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:08,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:08,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:09,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:09,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:09,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931123974] [2021-11-19 14:14:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931123974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:09,712 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833487340] [2021-11-19 14:14:09,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:09,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:09,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:09,716 INFO L87 Difference]: Start difference. First operand 537 states and 895 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:14:09,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:09,902 INFO L93 Difference]: Finished difference Result 1058 states and 1768 transitions. [2021-11-19 14:14:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 106 [2021-11-19 14:14:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:09,924 INFO L225 Difference]: With dead ends: 1058 [2021-11-19 14:14:09,924 INFO L226 Difference]: Without dead ends: 537 [2021-11-19 14:14:09,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 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 14:14:09,950 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 30 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:09,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2642 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-19 14:14:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-19 14:14:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6832151300236406) internal successors, (712), 442 states have internal predecessors, (712), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:14:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 889 transitions. [2021-11-19 14:14:10,028 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 889 transitions. Word has length 106 [2021-11-19 14:14:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:10,028 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 889 transitions. [2021-11-19 14:14:10,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:14:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 889 transitions. [2021-11-19 14:14:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:14:10,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:10,034 INFO L514 BasicCegarLoop]: trace histogram [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 14:14:10,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:10,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:10,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1786056527, now seen corresponding path program 1 times [2021-11-19 14:14:10,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:10,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463541308] [2021-11-19 14:14:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:10,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:10,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:10,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:10,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:11,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:11,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463541308] [2021-11-19 14:14:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463541308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:11,250 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:11,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:11,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412888078] [2021-11-19 14:14:11,251 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:11,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:11,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:11,253 INFO L87 Difference]: Start difference. First operand 537 states and 889 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:11,416 INFO L93 Difference]: Finished difference Result 1016 states and 1685 transitions. [2021-11-19 14:14:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 111 [2021-11-19 14:14:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:11,424 INFO L225 Difference]: With dead ends: 1016 [2021-11-19 14:14:11,425 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:14:11,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 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 14:14:11,431 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 118 mSDsluCounter, 4287 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 5163 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:11,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 5163 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:14:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:14:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.6762589928057554) internal successors, (699), 436 states have internal predecessors, (699), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:14:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 876 transitions. [2021-11-19 14:14:11,497 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 876 transitions. Word has length 111 [2021-11-19 14:14:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 876 transitions. [2021-11-19 14:14:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 876 transitions. [2021-11-19 14:14:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:14:11,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:11,508 INFO L514 BasicCegarLoop]: trace histogram [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 14:14:11,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:11,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:11,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -209131246, now seen corresponding path program 1 times [2021-11-19 14:14:11,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:11,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358127906] [2021-11-19 14:14:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:11,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:11,734 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:12,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:12,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:12,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358127906] [2021-11-19 14:14:12,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358127906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:12,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:12,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:12,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923733612] [2021-11-19 14:14:12,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:12,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:12,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:12,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:12,650 INFO L87 Difference]: Start difference. First operand 531 states and 876 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:14:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:12,835 INFO L93 Difference]: Finished difference Result 1019 states and 1686 transitions. [2021-11-19 14:14:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:12,836 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2021-11-19 14:14:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:12,843 INFO L225 Difference]: With dead ends: 1019 [2021-11-19 14:14:12,843 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:14:12,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 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 14:14:12,848 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 121 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:12,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 3271 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:14:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:14:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.618705035971223) internal successors, (675), 436 states have internal predecessors, (675), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:14:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 852 transitions. [2021-11-19 14:14:12,884 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 852 transitions. Word has length 112 [2021-11-19 14:14:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:12,884 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 852 transitions. [2021-11-19 14:14:12,885 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:14:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 852 transitions. [2021-11-19 14:14:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:14:12,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:12,890 INFO L514 BasicCegarLoop]: trace histogram [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 14:14:12,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:13,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:13,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash 936457175, now seen corresponding path program 1 times [2021-11-19 14:14:13,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:13,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752806419] [2021-11-19 14:14:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:13,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:13,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:13,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:13,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:14,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:14,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752806419] [2021-11-19 14:14:14,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752806419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:14,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:14,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:14:14,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253905680] [2021-11-19 14:14:14,111 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:14,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:14,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:14,113 INFO L87 Difference]: Start difference. First operand 531 states and 852 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:14:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:14,276 INFO L93 Difference]: Finished difference Result 1010 states and 1648 transitions. [2021-11-19 14:14:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 114 [2021-11-19 14:14:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:14,284 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 14:14:14,284 INFO L226 Difference]: Without dead ends: 510 [2021-11-19 14:14:14,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:14,288 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 89 mSDsluCounter, 4939 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5779 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:14,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5779 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-19 14:14:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-19 14:14:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6414141414141414) internal successors, (650), 415 states have internal predecessors, (650), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:14:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 827 transitions. [2021-11-19 14:14:14,323 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 827 transitions. Word has length 114 [2021-11-19 14:14:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:14,323 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 827 transitions. [2021-11-19 14:14:14,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:14:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 827 transitions. [2021-11-19 14:14:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:14:14,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:14,334 INFO L514 BasicCegarLoop]: trace histogram [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 14:14:14,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:14:14,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:14,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1638240868, now seen corresponding path program 1 times [2021-11-19 14:14:14,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:14,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413331977] [2021-11-19 14:14:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:14,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:14,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:14,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:14,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:15,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:14:15,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:15,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413331977] [2021-11-19 14:14:15,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413331977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:15,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:15,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:14:15,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589733021] [2021-11-19 14:14:15,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:15,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:14:15,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:14:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:15,663 INFO L87 Difference]: Start difference. First operand 510 states and 827 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:15,826 INFO L93 Difference]: Finished difference Result 983 states and 1612 transitions. [2021-11-19 14:14:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-19 14:14:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:15,834 INFO L225 Difference]: With dead ends: 983 [2021-11-19 14:14:15,834 INFO L226 Difference]: Without dead ends: 510 [2021-11-19 14:14:15,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:14:15,843 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 44 mSDsluCounter, 5655 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6467 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:15,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 6467 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-19 14:14:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-19 14:14:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6388888888888888) internal successors, (649), 415 states have internal predecessors, (649), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:14:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 826 transitions. [2021-11-19 14:14:15,874 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 826 transitions. Word has length 117 [2021-11-19 14:14:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:15,874 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 826 transitions. [2021-11-19 14:14:15,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 826 transitions. [2021-11-19 14:14:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:14:15,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:15,879 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:15,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:16,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -365765455, now seen corresponding path program 1 times [2021-11-19 14:14:16,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:16,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674392295] [2021-11-19 14:14:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:16,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:16,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:16,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:16,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:17,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:17,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674392295] [2021-11-19 14:14:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674392295] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:17,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:17,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:17,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30748497] [2021-11-19 14:14:17,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:17,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:17,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:17,199 INFO L87 Difference]: Start difference. First operand 510 states and 826 transitions. Second operand has 5 states, 5 states have (on average 17.0) 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, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:18,044 INFO L93 Difference]: Finished difference Result 979 states and 1629 transitions. [2021-11-19 14:14:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) 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, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2021-11-19 14:14:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:18,051 INFO L225 Difference]: With dead ends: 979 [2021-11-19 14:14:18,051 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 14:14:18,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:18,056 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 762 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:18,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 2063 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:14:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 14:14:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-19 14:14:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6340852130325814) internal successors, (652), 418 states have internal predecessors, (652), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-19 14:14:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 830 transitions. [2021-11-19 14:14:18,087 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 830 transitions. Word has length 118 [2021-11-19 14:14:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:18,087 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 830 transitions. [2021-11-19 14:14:18,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) 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, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 830 transitions. [2021-11-19 14:14:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:14:18,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:18,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:18,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:14:18,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:18,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1709795483, now seen corresponding path program 1 times [2021-11-19 14:14:18,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:18,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078566073] [2021-11-19 14:14:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:18,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:18,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:18,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:14:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:18,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:18,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:19,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:19,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078566073] [2021-11-19 14:14:19,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078566073] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:19,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:19,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:19,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792853361] [2021-11-19 14:14:19,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:19,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:19,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:19,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:19,401 INFO L87 Difference]: Start difference. First operand 514 states and 830 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:20,187 INFO L93 Difference]: Finished difference Result 988 states and 1636 transitions. [2021-11-19 14:14:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-19 14:14:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:20,194 INFO L225 Difference]: With dead ends: 988 [2021-11-19 14:14:20,194 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 14:14:20,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:20,198 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 762 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:20,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 2064 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:14:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 14:14:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-19 14:14:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.6277915632754343) internal successors, (656), 422 states have internal predecessors, (656), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (88), 84 states have call predecessors, (88), 86 states have call successors, (88) [2021-11-19 14:14:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 835 transitions. [2021-11-19 14:14:20,229 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 835 transitions. Word has length 120 [2021-11-19 14:14:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:20,229 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 835 transitions. [2021-11-19 14:14:20,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 835 transitions. [2021-11-19 14:14:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:14:20,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:20,257 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:20,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:20,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:20,477 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 273910961, now seen corresponding path program 1 times [2021-11-19 14:14:20,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:20,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644964363] [2021-11-19 14:14:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:20,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:20,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:20,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:20,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:20,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:21,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:21,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:21,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644964363] [2021-11-19 14:14:21,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644964363] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:21,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:21,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:21,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919320089] [2021-11-19 14:14:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:21,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:21,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:21,668 INFO L87 Difference]: Start difference. First operand 519 states and 835 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:22,447 INFO L93 Difference]: Finished difference Result 999 states and 1645 transitions. [2021-11-19 14:14:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:22,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2021-11-19 14:14:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:22,453 INFO L225 Difference]: With dead ends: 999 [2021-11-19 14:14:22,453 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 14:14:22,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:22,457 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 763 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:22,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 2064 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:14:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 14:14:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 14:14:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6200980392156863) internal successors, (661), 427 states have internal predecessors, (661), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (89), 84 states have call predecessors, (89), 86 states have call successors, (89) [2021-11-19 14:14:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 841 transitions. [2021-11-19 14:14:22,485 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 841 transitions. Word has length 122 [2021-11-19 14:14:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:22,486 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 841 transitions. [2021-11-19 14:14:22,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 841 transitions. [2021-11-19 14:14:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:14:22,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:22,493 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:22,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:22,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:22,710 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 965977491, now seen corresponding path program 1 times [2021-11-19 14:14:22,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:22,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070428401] [2021-11-19 14:14:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:22,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:22,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:22,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:22,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:14:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:23,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:23,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:23,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070428401] [2021-11-19 14:14:23,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070428401] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:23,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:23,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:23,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152599751] [2021-11-19 14:14:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:23,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:23,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:23,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:23,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:23,857 INFO L87 Difference]: Start difference. First operand 525 states and 841 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:24,628 INFO L93 Difference]: Finished difference Result 1012 states and 1656 transitions. [2021-11-19 14:14:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-19 14:14:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:24,634 INFO L225 Difference]: With dead ends: 1012 [2021-11-19 14:14:24,635 INFO L226 Difference]: Without dead ends: 532 [2021-11-19 14:14:24,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:24,639 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 764 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:24,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 2064 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:14:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-19 14:14:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-11-19 14:14:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 414 states have (on average 1.6111111111111112) internal successors, (667), 433 states have internal predecessors, (667), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-11-19 14:14:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 848 transitions. [2021-11-19 14:14:24,669 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 848 transitions. Word has length 124 [2021-11-19 14:14:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:24,669 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 848 transitions. [2021-11-19 14:14:24,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 848 transitions. [2021-11-19 14:14:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:14:24,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:24,674 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] [2021-11-19 14:14:24,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:24,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:24,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1102015153, now seen corresponding path program 1 times [2021-11-19 14:14:24,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:24,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878770787] [2021-11-19 14:14:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:24,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:24,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:24,890 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:24,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:14:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:14:26,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:26,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878770787] [2021-11-19 14:14:26,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878770787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:26,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1184960060] [2021-11-19 14:14:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:26,677 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:26,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:26,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:26,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:14:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:27,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1184960060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:27,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:14:27,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 14:14:27,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135113991] [2021-11-19 14:14:27,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:27,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:27,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:27,492 INFO L87 Difference]: Start difference. First operand 532 states and 848 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:27,578 INFO L93 Difference]: Finished difference Result 1497 states and 2443 transitions. [2021-11-19 14:14:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 126 [2021-11-19 14:14:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:27,590 INFO L225 Difference]: With dead ends: 1497 [2021-11-19 14:14:27,590 INFO L226 Difference]: Without dead ends: 1010 [2021-11-19 14:14:27,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:27,595 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 810 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:27,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1773 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-11-19 14:14:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1008. [2021-11-19 14:14:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 786 states have (on average 1.6323155216284988) internal successors, (1283), 819 states have internal predecessors, (1283), 172 states have call successors, (172), 49 states have call predecessors, (172), 49 states have return successors, (185), 165 states have call predecessors, (185), 167 states have call successors, (185) [2021-11-19 14:14:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1640 transitions. [2021-11-19 14:14:27,658 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1640 transitions. Word has length 126 [2021-11-19 14:14:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:27,658 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1640 transitions. [2021-11-19 14:14:27,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1640 transitions. [2021-11-19 14:14:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:14:27,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:27,664 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 14:14:27,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 14:14:27,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:28,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:28,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash -197395859, now seen corresponding path program 1 times [2021-11-19 14:14:28,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:28,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929554500] [2021-11-19 14:14:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:28,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:28,099 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:28,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:14:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:28,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:14:29,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:29,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929554500] [2021-11-19 14:14:29,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929554500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:29,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659833048] [2021-11-19 14:14:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:29,788 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:29,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:29,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:14:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:30,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:30,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [659833048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:30,634 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:14:30,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 14:14:30,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773053678] [2021-11-19 14:14:30,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:30,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:30,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:30,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:30,637 INFO L87 Difference]: Start difference. First operand 1008 states and 1640 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:30,747 INFO L93 Difference]: Finished difference Result 2927 states and 4837 transitions. [2021-11-19 14:14:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2021-11-19 14:14:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:30,766 INFO L225 Difference]: With dead ends: 2927 [2021-11-19 14:14:30,767 INFO L226 Difference]: Without dead ends: 1964 [2021-11-19 14:14:30,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:30,778 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 809 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:30,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1745 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-11-19 14:14:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1961. [2021-11-19 14:14:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1531 states have (on average 1.643370346178968) internal successors, (2516), 1592 states have internal predecessors, (2516), 334 states have call successors, (334), 93 states have call predecessors, (334), 95 states have return successors, (387), 327 states have call predecessors, (387), 329 states have call successors, (387) [2021-11-19 14:14:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3237 transitions. [2021-11-19 14:14:30,898 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3237 transitions. Word has length 127 [2021-11-19 14:14:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:30,899 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3237 transitions. [2021-11-19 14:14:30,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3237 transitions. [2021-11-19 14:14:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:14:30,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:30,909 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, 1] [2021-11-19 14:14:30,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:31,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:31,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:31,317 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1824427661, now seen corresponding path program 1 times [2021-11-19 14:14:31,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:31,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618414454] [2021-11-19 14:14:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:31,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:31,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:31,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:14:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:32,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:14:32,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:32,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618414454] [2021-11-19 14:14:32,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618414454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:32,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450367090] [2021-11-19 14:14:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:32,910 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:32,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:32,911 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:32,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:14:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:33,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450367090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:33,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:14:33,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 14:14:33,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638998624] [2021-11-19 14:14:33,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:33,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:33,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:33,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:33,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:33,788 INFO L87 Difference]: Start difference. First operand 1961 states and 3237 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:33,969 INFO L93 Difference]: Finished difference Result 5788 states and 9679 transitions. [2021-11-19 14:14:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 128 [2021-11-19 14:14:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:34,009 INFO L225 Difference]: With dead ends: 5788 [2021-11-19 14:14:34,009 INFO L226 Difference]: Without dead ends: 3872 [2021-11-19 14:14:34,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:34,024 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 808 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:34,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1748 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-11-19 14:14:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 3868. [2021-11-19 14:14:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3022 states have (on average 1.6485771012574455) internal successors, (4982), 3139 states have internal predecessors, (4982), 658 states have call successors, (658), 181 states have call predecessors, (658), 187 states have return successors, (827), 651 states have call predecessors, (827), 653 states have call successors, (827) [2021-11-19 14:14:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 6467 transitions. [2021-11-19 14:14:34,286 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 6467 transitions. Word has length 128 [2021-11-19 14:14:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:34,287 INFO L470 AbstractCegarLoop]: Abstraction has 3868 states and 6467 transitions. [2021-11-19 14:14:34,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 6467 transitions. [2021-11-19 14:14:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:14:34,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:34,293 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, 1, 1] [2021-11-19 14:14:34,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:34,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:34,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:34,696 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -722802065, now seen corresponding path program 1 times [2021-11-19 14:14:34,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:34,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91435997] [2021-11-19 14:14:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:34,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:34,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:34,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:14:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:34,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:35,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:14:36,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:36,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91435997] [2021-11-19 14:14:36,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91435997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:36,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1390565226] [2021-11-19 14:14:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:36,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:36,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:36,135 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:36,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:14:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:36,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:36,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:36,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1390565226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:36,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:14:36,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 14:14:36,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199758615] [2021-11-19 14:14:36,922 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:36,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:36,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:36,924 INFO L87 Difference]: Start difference. First operand 3868 states and 6467 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:37,279 INFO L93 Difference]: Finished difference Result 11511 states and 19540 transitions. [2021-11-19 14:14:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2021-11-19 14:14:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:37,350 INFO L225 Difference]: With dead ends: 11511 [2021-11-19 14:14:37,350 INFO L226 Difference]: Without dead ends: 7688 [2021-11-19 14:14:37,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:37,377 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 807 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:37,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 1756 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7688 states. [2021-11-19 14:14:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7688 to 7683. [2021-11-19 14:14:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 6005 states have (on average 1.650624479600333) internal successors, (9912), 6234 states have internal predecessors, (9912), 1306 states have call successors, (1306), 357 states have call predecessors, (1306), 371 states have return successors, (1827), 1299 states have call predecessors, (1827), 1301 states have call successors, (1827) [2021-11-19 14:14:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 13045 transitions. [2021-11-19 14:14:37,945 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 13045 transitions. Word has length 129 [2021-11-19 14:14:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:37,945 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 13045 transitions. [2021-11-19 14:14:37,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 13045 transitions. [2021-11-19 14:14:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:14:37,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:37,953 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, 1, 1, 1] [2021-11-19 14:14:37,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:38,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:38,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,373 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -932143051, now seen corresponding path program 1 times [2021-11-19 14:14:38,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:38,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628732701] [2021-11-19 14:14:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:38,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:38,376 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:38,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:14:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:39,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:14:39,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:39,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628732701] [2021-11-19 14:14:39,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628732701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:39,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143016158] [2021-11-19 14:14:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:39,836 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:39,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:39,839 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:39,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:14:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:40,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:14:40,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2143016158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:40,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:14:40,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 14:14:40,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596511586] [2021-11-19 14:14:40,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:40,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:40,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:40,571 INFO L87 Difference]: Start difference. First operand 7683 states and 13045 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:41,172 INFO L93 Difference]: Finished difference Result 22958 states and 39900 transitions. [2021-11-19 14:14:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 130 [2021-11-19 14:14:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:41,328 INFO L225 Difference]: With dead ends: 22958 [2021-11-19 14:14:41,329 INFO L226 Difference]: Without dead ends: 15312 [2021-11-19 14:14:41,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:41,446 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 805 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:41,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 1780 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15312 states. [2021-11-19 14:14:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15312 to 15306. [2021-11-19 14:14:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15306 states, 11965 states have (on average 1.6508148767237776) internal successors, (19752), 12418 states have internal predecessors, (19752), 2602 states have call successors, (2602), 709 states have call predecessors, (2602), 738 states have return successors, (4258), 2594 states have call predecessors, (4258), 2597 states have call successors, (4258) [2021-11-19 14:14:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15306 states to 15306 states and 26612 transitions. [2021-11-19 14:14:42,535 INFO L78 Accepts]: Start accepts. Automaton has 15306 states and 26612 transitions. Word has length 130 [2021-11-19 14:14:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:42,536 INFO L470 AbstractCegarLoop]: Abstraction has 15306 states and 26612 transitions. [2021-11-19 14:14:42,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:14:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 15306 states and 26612 transitions. [2021-11-19 14:14:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 14:14:42,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:42,571 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:42,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:42,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:42,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:42,988 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash 325853586, now seen corresponding path program 1 times [2021-11-19 14:14:42,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:42,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123131958] [2021-11-19 14:14:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:42,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:42,990 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:14:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:14:43,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:14:44,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:44,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123131958] [2021-11-19 14:14:44,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123131958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:44,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:44,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 14:14:44,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338367435] [2021-11-19 14:14:44,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:44,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:14:44,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:14:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:14:44,547 INFO L87 Difference]: Start difference. First operand 15306 states and 26612 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 12 states have internal predecessors, (142), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-19 14:14:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:57,954 INFO L93 Difference]: Finished difference Result 74851 states and 147224 transitions. [2021-11-19 14:14:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 14:14:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 12 states have internal predecessors, (142), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) Word has length 187 [2021-11-19 14:14:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:59,103 INFO L225 Difference]: With dead ends: 74851 [2021-11-19 14:14:59,103 INFO L226 Difference]: Without dead ends: 59590 [2021-11-19 14:14:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 14:14:59,297 INFO L933 BasicCegarLoop]: 1752 mSDtfsCounter, 7136 mSDsluCounter, 5106 mSDsCounter, 0 mSdLazyCounter, 9510 mSolverCounterSat, 2951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7172 SdHoareTripleChecker+Valid, 6858 SdHoareTripleChecker+Invalid, 12461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2951 IncrementalHoareTripleChecker+Valid, 9510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7172 Valid, 6858 Invalid, 12461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2951 Valid, 9510 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 14:14:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59590 states. [2021-11-19 14:15:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59590 to 51696. [2021-11-19 14:15:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51696 states, 39328 states have (on average 1.6330858421480878) internal successors, (64226), 41061 states have internal predecessors, (64226), 9868 states have call successors, (9868), 2118 states have call predecessors, (9868), 2499 states have return successors, (22978), 10084 states have call predecessors, (22978), 9863 states have call successors, (22978) [2021-11-19 14:15:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51696 states to 51696 states and 97072 transitions. [2021-11-19 14:15:04,653 INFO L78 Accepts]: Start accepts. Automaton has 51696 states and 97072 transitions. Word has length 187 [2021-11-19 14:15:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:04,653 INFO L470 AbstractCegarLoop]: Abstraction has 51696 states and 97072 transitions. [2021-11-19 14:15:04,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 12 states have internal predecessors, (142), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-19 14:15:04,654 INFO L276 IsEmpty]: Start isEmpty. Operand 51696 states and 97072 transitions. [2021-11-19 14:15:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 14:15:04,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:04,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:04,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:05,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:05,016 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash -113878969, now seen corresponding path program 1 times [2021-11-19 14:15:05,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:05,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193879969] [2021-11-19 14:15:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:05,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:05,019 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:05,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:15:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:15:05,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:15:06,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:06,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193879969] [2021-11-19 14:15:06,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193879969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:06,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:06,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:15:06,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224859760] [2021-11-19 14:15:06,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:06,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:15:06,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:15:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:06,360 INFO L87 Difference]: Start difference. First operand 51696 states and 97072 transitions. Second operand has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 14:15:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:08,010 INFO L93 Difference]: Finished difference Result 66805 states and 123355 transitions. [2021-11-19 14:15:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 194 [2021-11-19 14:15:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:08,118 INFO L225 Difference]: With dead ends: 66805 [2021-11-19 14:15:08,118 INFO L226 Difference]: Without dead ends: 15143 [2021-11-19 14:15:08,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:08,380 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 26 mSDsluCounter, 5596 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6401 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:08,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6401 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15143 states. [2021-11-19 14:15:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15143 to 15143. [2021-11-19 14:15:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15143 states, 11866 states have (on average 1.6505140738243722) internal successors, (19585), 12319 states have internal predecessors, (19585), 2538 states have call successors, (2538), 709 states have call predecessors, (2538), 738 states have return successors, (4194), 2530 states have call predecessors, (4194), 2533 states have call successors, (4194) [2021-11-19 14:15:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15143 states to 15143 states and 26317 transitions. [2021-11-19 14:15:09,343 INFO L78 Accepts]: Start accepts. Automaton has 15143 states and 26317 transitions. Word has length 194 [2021-11-19 14:15:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:09,343 INFO L470 AbstractCegarLoop]: Abstraction has 15143 states and 26317 transitions. [2021-11-19 14:15:09,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 14:15:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15143 states and 26317 transitions. [2021-11-19 14:15:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-19 14:15:09,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:09,363 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:09,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:09,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,577 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1506333285, now seen corresponding path program 1 times [2021-11-19 14:15:09,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:09,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273864745] [2021-11-19 14:15:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:09,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:09,580 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:09,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:15:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:15:10,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:15:11,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:11,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273864745] [2021-11-19 14:15:11,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273864745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:11,288 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:11,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-19 14:15:11,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635423573] [2021-11-19 14:15:11,289 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:11,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:11,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:11,290 INFO L87 Difference]: Start difference. First operand 15143 states and 26317 transitions. Second operand has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 14:15:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:14,135 INFO L93 Difference]: Finished difference Result 30436 states and 54000 transitions. [2021-11-19 14:15:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:14,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) Word has length 193 [2021-11-19 14:15:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:14,264 INFO L225 Difference]: With dead ends: 30436 [2021-11-19 14:15:14,265 INFO L226 Difference]: Without dead ends: 15335 [2021-11-19 14:15:14,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:15:14,365 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1870 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:14,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1870 Valid, 2102 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:15:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15335 states. [2021-11-19 14:15:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15335 to 15271. [2021-11-19 14:15:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15271 states, 11962 states have (on average 1.6452934291924428) internal successors, (19681), 12415 states have internal predecessors, (19681), 2538 states have call successors, (2538), 709 states have call predecessors, (2538), 770 states have return successors, (4354), 2562 states have call predecessors, (4354), 2533 states have call successors, (4354) [2021-11-19 14:15:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15271 states to 15271 states and 26573 transitions. [2021-11-19 14:15:15,276 INFO L78 Accepts]: Start accepts. Automaton has 15271 states and 26573 transitions. Word has length 193 [2021-11-19 14:15:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:15,277 INFO L470 AbstractCegarLoop]: Abstraction has 15271 states and 26573 transitions. [2021-11-19 14:15:15,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 14:15:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15271 states and 26573 transitions. [2021-11-19 14:15:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 14:15:15,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:15,296 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:15,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:15,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:15,513 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash 434715322, now seen corresponding path program 1 times [2021-11-19 14:15:15,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:15,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585103347] [2021-11-19 14:15:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:15,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:15,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:15,516 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:15,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:15:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:15,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 14:15:16,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 14:15:17,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:17,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585103347] [2021-11-19 14:15:17,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585103347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:17,338 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:17,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:15:17,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365144199] [2021-11-19 14:15:17,338 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:17,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:15:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:15:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:17,341 INFO L87 Difference]: Start difference. First operand 15271 states and 26573 transitions. Second operand has 12 states, 12 states have (on average 18.583333333333332) internal successors, (223), 12 states have internal predecessors, (223), 8 states have call successors, (45), 6 states have call predecessors, (45), 7 states have return successors, (45), 8 states have call predecessors, (45), 7 states have call successors, (45) [2021-11-19 14:15:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:23,946 INFO L93 Difference]: Finished difference Result 60031 states and 108858 transitions. [2021-11-19 14:15:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:15:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.583333333333332) internal successors, (223), 12 states have internal predecessors, (223), 8 states have call successors, (45), 6 states have call predecessors, (45), 7 states have return successors, (45), 8 states have call predecessors, (45), 7 states have call successors, (45) Word has length 194 [2021-11-19 14:15:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:24,370 INFO L225 Difference]: With dead ends: 60031 [2021-11-19 14:15:24,370 INFO L226 Difference]: Without dead ends: 44802 [2021-11-19 14:15:24,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:15:24,478 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 3401 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 4587 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 5522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 4587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:24,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3526 Valid, 3068 Invalid, 5522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 4587 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 14:15:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44802 states. [2021-11-19 14:15:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44802 to 44398. [2021-11-19 14:15:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44398 states, 34692 states have (on average 1.6144644298397326) internal successors, (56009), 36040 states have internal predecessors, (56009), 7400 states have call successors, (7400), 2213 states have call predecessors, (7400), 2305 states have return successors, (14944), 7297 states have call predecessors, (14944), 7395 states have call successors, (14944) [2021-11-19 14:15:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44398 states to 44398 states and 78353 transitions. [2021-11-19 14:15:26,698 INFO L78 Accepts]: Start accepts. Automaton has 44398 states and 78353 transitions. Word has length 194 [2021-11-19 14:15:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:26,698 INFO L470 AbstractCegarLoop]: Abstraction has 44398 states and 78353 transitions. [2021-11-19 14:15:26,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.583333333333332) internal successors, (223), 12 states have internal predecessors, (223), 8 states have call successors, (45), 6 states have call predecessors, (45), 7 states have return successors, (45), 8 states have call predecessors, (45), 7 states have call successors, (45) [2021-11-19 14:15:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 44398 states and 78353 transitions. [2021-11-19 14:15:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-19 14:15:26,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:26,718 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:26,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:26,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:26,939 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash 642574104, now seen corresponding path program 1 times [2021-11-19 14:15:26,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:26,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400707892] [2021-11-19 14:15:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:26,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:26,941 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:26,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:15:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:15:27,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:15:28,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:28,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400707892] [2021-11-19 14:15:28,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400707892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:28,400 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:28,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-19 14:15:28,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864424194] [2021-11-19 14:15:28,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:28,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:15:28,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:28,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:15:28,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:28,404 INFO L87 Difference]: Start difference. First operand 44398 states and 78353 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 14:15:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:42,433 INFO L93 Difference]: Finished difference Result 161683 states and 341358 transitions. [2021-11-19 14:15:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:15:42,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 196 [2021-11-19 14:15:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:43,936 INFO L225 Difference]: With dead ends: 161683 [2021-11-19 14:15:43,936 INFO L226 Difference]: Without dead ends: 117327 [2021-11-19 14:15:44,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:15:44,619 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 3812 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 5327 mSolverCounterSat, 1256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3846 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 6583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 5327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:44,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3846 Valid, 4044 Invalid, 6583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1256 Valid, 5327 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 14:15:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117327 states. [2021-11-19 14:15:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117327 to 104436. [2021-11-19 14:15:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104436 states, 78157 states have (on average 1.5926532492291157) internal successors, (124477), 82577 states have internal predecessors, (124477), 21318 states have call successors, (21318), 4421 states have call predecessors, (21318), 4960 states have return successors, (51757), 21279 states have call predecessors, (51757), 21313 states have call successors, (51757) [2021-11-19 14:15:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104436 states to 104436 states and 197552 transitions. [2021-11-19 14:15:53,839 INFO L78 Accepts]: Start accepts. Automaton has 104436 states and 197552 transitions. Word has length 196 [2021-11-19 14:15:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:53,840 INFO L470 AbstractCegarLoop]: Abstraction has 104436 states and 197552 transitions. [2021-11-19 14:15:53,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 14:15:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 104436 states and 197552 transitions. [2021-11-19 14:15:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-19 14:15:53,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:53,878 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:53,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:54,097 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:54,098 INFO L85 PathProgramCache]: Analyzing trace with hash 427744951, now seen corresponding path program 1 times [2021-11-19 14:15:54,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:54,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138695520] [2021-11-19 14:15:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:54,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:54,099 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:54,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4a8d769-8feb-4240-85c5-da42626b62cb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:15:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:15:54,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:15:55,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:55,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138695520] [2021-11-19 14:15:55,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138695520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:55,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:55,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-19 14:15:55,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788788961] [2021-11-19 14:15:55,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:55,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:55,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:55,276 INFO L87 Difference]: Start difference. First operand 104436 states and 197552 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37)