./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF --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 d993ff45e37665d9abd93530677e1201b0648bf8ee13fa84b0c68926f580d988 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:33:03,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:33:03,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:33:03,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:33:03,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:33:03,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:33:03,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:33:03,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:33:03,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:33:03,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:33:03,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:33:03,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:33:03,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:33:03,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:33:03,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:33:03,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:33:03,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:33:03,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:33:03,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:33:03,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:33:03,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:33:03,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:33:03,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:33:03,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:33:03,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:33:03,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:33:03,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:33:03,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:33:03,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:33:03,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:33:03,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:33:03,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:33:03,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:33:03,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:33:03,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:33:03,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:33:03,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:33:03,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:33:03,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:33:03,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:33:03,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:33:03,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:33:03,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:33:03,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:33:03,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:33:03,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:33:03,382 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:33:03,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:33:03,383 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:33:03,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:33:03,383 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:33:03,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:33:03,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:33:03,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:33:03,386 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:33:03,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:33:03,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:33:03,387 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:33:03,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:33:03,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:33:03,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:33:03,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:33:03,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:33:03,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:33:03,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:33:03,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:33:03,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:33:03,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:33:03,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:33:03,392 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:33:03,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:33:03,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:33:03,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:33:03,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:33:03,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:33:03,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:33:03,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:33:03,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:33:03,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:33:03,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:33:03,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:33:03,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:33:03,399 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d993ff45e37665d9abd93530677e1201b0648bf8ee13fa84b0c68926f580d988 [2021-11-12 22:33:03,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:33:03,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:33:03,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:33:03,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:33:03,830 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:33:03,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i [2021-11-12 22:33:03,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/796088df7/b9af39958ff04753b2a33e158f722f65/FLAG9b88a66cd [2021-11-12 22:33:04,651 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:33:04,652 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i [2021-11-12 22:33:04,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/796088df7/b9af39958ff04753b2a33e158f722f65/FLAG9b88a66cd [2021-11-12 22:33:04,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/796088df7/b9af39958ff04753b2a33e158f722f65 [2021-11-12 22:33:04,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:33:04,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:33:04,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:33:04,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:33:04,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:33:04,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:33:04" (1/1) ... [2021-11-12 22:33:04,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3d252c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:04, skipping insertion in model container [2021-11-12 22:33:04,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:33:04" (1/1) ... [2021-11-12 22:33:04,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:33:04,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:33:05,586 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[33021,33034] [2021-11-12 22:33:05,949 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[84583,84596] [2021-11-12 22:33:05,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:33:05,976 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) [2021-11-12 22:33:05,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e478690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:05, skipping insertion in model container [2021-11-12 22:33:05,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:33:05,977 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:33:05,980 INFO L158 Benchmark]: Toolchain (without parser) took 1179.19ms. Allocated memory is still 111.1MB. Free memory was 65.3MB in the beginning and 63.3MB in the end (delta: 2.0MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-11-12 22:33:05,980 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:33:05,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1173.20ms. Allocated memory is still 111.1MB. Free memory was 65.1MB in the beginning and 63.3MB in the end (delta: 1.8MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-11-12 22:33:05,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1173.20ms. Allocated memory is still 111.1MB. Free memory was 65.1MB in the beginning and 63.3MB in the end (delta: 1.8MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2221]: 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF --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 d993ff45e37665d9abd93530677e1201b0648bf8ee13fa84b0c68926f580d988 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:33:08,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:33:08,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:33:08,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:33:08,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:33:08,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:33:08,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:33:08,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:33:08,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:33:08,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:33:08,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:33:08,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:33:08,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:33:08,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:33:08,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:33:08,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:33:08,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:33:08,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:33:08,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:33:08,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:33:08,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:33:08,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:33:08,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:33:08,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:33:08,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:33:08,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:33:08,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:33:08,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:33:08,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:33:08,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:33:08,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:33:08,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:33:08,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:33:08,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:33:08,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:33:08,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:33:08,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:33:08,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:33:08,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:33:08,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:33:08,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:33:08,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:33:08,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:33:08,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:33:08,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:33:08,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:33:08,619 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:33:08,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:33:08,619 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:33:08,620 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:33:08,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:33:08,620 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:33:08,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:33:08,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:33:08,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:33:08,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:33:08,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:33:08,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:33:08,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:33:08,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:33:08,625 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:33:08,625 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:33:08,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:33:08,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:33:08,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:33:08,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:33:08,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:33:08,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:33:08,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:33:08,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:33:08,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:33:08,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:33:08,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:33:08,629 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:33:08,629 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:08,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:33:08,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:33:08,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:33:08,631 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d993ff45e37665d9abd93530677e1201b0648bf8ee13fa84b0c68926f580d988 [2021-11-12 22:33:09,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:33:09,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:33:09,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:33:09,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:33:09,155 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:33:09,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i [2021-11-12 22:33:09,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/fa2c8fac4/48d652609f9144b29030e6c9b5183729/FLAG8eba9837f [2021-11-12 22:33:09,992 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:33:09,995 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i [2021-11-12 22:33:10,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/fa2c8fac4/48d652609f9144b29030e6c9b5183729/FLAG8eba9837f [2021-11-12 22:33:10,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/data/fa2c8fac4/48d652609f9144b29030e6c9b5183729 [2021-11-12 22:33:10,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:33:10,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:33:10,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:33:10,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:33:10,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:33:10,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:33:10" (1/1) ... [2021-11-12 22:33:10,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65538c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:10, skipping insertion in model container [2021-11-12 22:33:10,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:33:10" (1/1) ... [2021-11-12 22:33:10,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:33:10,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:33:10,735 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[33021,33034] [2021-11-12 22:33:11,133 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[84583,84596] [2021-11-12 22:33:11,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:33:11,189 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:33:11,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:33:11,261 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[33021,33034] [2021-11-12 22:33:11,450 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[84583,84596] [2021-11-12 22:33:11,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:33:11,461 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:33:11,486 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[33021,33034] [2021-11-12 22:33:11,622 WARN L228 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_965f478f-2b10-4ffb-88fb-7dcb75da3af6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i[84583,84596] [2021-11-12 22:33:11,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:33:11,717 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:33:11,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11 WrapperNode [2021-11-12 22:33:11,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:33:11,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:33:11,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:33:11,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:33:11,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:11,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:11,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:33:11,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:33:11,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:33:11,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:33:12,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:33:12,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:33:12,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:33:12,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:33:12,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (1/1) ... [2021-11-12 22:33:12,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:33:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:33:12,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:33:12,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:33:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:33:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:33:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:33:12,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:33:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:33:12,251 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:33:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:33:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:33:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:33:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 22:33:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:33:12,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:33:12,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:33:12,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:33:12,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:33:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:33:20,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:33:20,622 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-12 22:33:20,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:33:20 BoogieIcfgContainer [2021-11-12 22:33:20,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:33:20,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:33:20,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:33:20,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:33:20,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:33:10" (1/3) ... [2021-11-12 22:33:20,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441a2609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:33:20, skipping insertion in model container [2021-11-12 22:33:20,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:33:11" (2/3) ... [2021-11-12 22:33:20,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441a2609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:33:20, skipping insertion in model container [2021-11-12 22:33:20,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:33:20" (3/3) ... [2021-11-12 22:33:20,636 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test9-2.i [2021-11-12 22:33:20,641 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:33:20,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:33:20,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:33:20,708 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 [2021-11-12 22:33:20,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:33:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 22:33:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 22:33:20,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:20,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:20,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-11-12 22:33:20,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:20,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203337936] [2021-11-12 22:33:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:20,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:20,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:20,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:33:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:21,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:33:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:21,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:21,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:21,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203337936] [2021-11-12 22:33:21,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203337936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:21,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:21,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:33:21,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381217417] [2021-11-12 22:33:21,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:21,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:33:21,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:33:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:33:21,251 INFO L87 Difference]: Start difference. First operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:21,464 INFO L93 Difference]: Finished difference Result 2390 states and 5142 transitions. [2021-11-12 22:33:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:33:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 22:33:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:21,525 INFO L225 Difference]: With dead ends: 2390 [2021-11-12 22:33:21,525 INFO L226 Difference]: Without dead ends: 1163 [2021-11-12 22:33:21,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:33:21,560 INFO L933 BasicCegarLoop]: 2253 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:21,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 22.89ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:33:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-11-12 22:33:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-11-12 22:33:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 22:33:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-11-12 22:33:22,195 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-11-12 22:33:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:22,196 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-11-12 22:33:22,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-11-12 22:33:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:33:22,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:22,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:22,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:33:22,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:22,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-11-12 22:33:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:22,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719773374] [2021-11-12 22:33:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:22,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:22,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:22,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:22,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:33:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:33:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:23,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:23,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719773374] [2021-11-12 22:33:23,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719773374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:23,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:23,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:33:23,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400570599] [2021-11-12 22:33:23,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:23,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:33:23,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:33:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:33:23,157 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:24,559 INFO L93 Difference]: Finished difference Result 2240 states and 4307 transitions. [2021-11-12 22:33:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:33:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:33:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:24,573 INFO L225 Difference]: With dead ends: 2240 [2021-11-12 22:33:24,573 INFO L226 Difference]: Without dead ends: 1172 [2021-11-12 22:33:24,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:33:24,581 INFO L933 BasicCegarLoop]: 2183 mSDtfsCounter, 2137 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 989.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 4988 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.03ms SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1205.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:24,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 4988 Invalid, 594 Unknown, 0 Unchecked, 40.03ms Time], IncrementalHoareTripleChecker [558 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 1205.34ms Time] [2021-11-12 22:33:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-12 22:33:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1166. [2021-11-12 22:33:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 659 states have (on average 1.817905918057663) internal successors, (1198), 1160 states have internal predecessors, (1198), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 22:33:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2204 transitions. [2021-11-12 22:33:24,858 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2204 transitions. Word has length 44 [2021-11-12 22:33:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:24,858 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2204 transitions. [2021-11-12 22:33:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2204 transitions. [2021-11-12 22:33:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:33:24,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:24,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:24,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:33:25,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:25,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1193374541, now seen corresponding path program 1 times [2021-11-12 22:33:25,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:25,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218153735] [2021-11-12 22:33:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:25,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:25,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:25,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:33:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:33:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:25,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:25,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:25,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218153735] [2021-11-12 22:33:25,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218153735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:25,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:25,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 22:33:25,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491948864] [2021-11-12 22:33:25,753 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:25,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:33:25,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:33:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:33:25,755 INFO L87 Difference]: Start difference. First operand 1166 states and 2204 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:28,700 INFO L93 Difference]: Finished difference Result 2236 states and 4284 transitions. [2021-11-12 22:33:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:33:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:33:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:28,714 INFO L225 Difference]: With dead ends: 2236 [2021-11-12 22:33:28,714 INFO L226 Difference]: Without dead ends: 1165 [2021-11-12 22:33:28,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:33:28,724 INFO L933 BasicCegarLoop]: 2183 mSDtfsCounter, 1051 mSDsluCounter, 6278 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2469.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 8461 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.90ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2762.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:28,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 8461 Invalid, 1585 Unknown, 0 Unchecked, 33.90ms Time], IncrementalHoareTripleChecker [10 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 2762.37ms Time] [2021-11-12 22:33:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-11-12 22:33:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1160. [2021-11-12 22:33:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 653 states have (on average 1.8192955589586524) internal successors, (1188), 1154 states have internal predecessors, (1188), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 22:33:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 2194 transitions. [2021-11-12 22:33:28,948 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 2194 transitions. Word has length 44 [2021-11-12 22:33:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:28,949 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 2194 transitions. [2021-11-12 22:33:28,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 2194 transitions. [2021-11-12 22:33:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:33:28,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:28,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:28,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:29,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:29,171 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash -440422729, now seen corresponding path program 1 times [2021-11-12 22:33:29,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:29,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849415892] [2021-11-12 22:33:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:29,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:29,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:29,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:29,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:33:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:29,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:29,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:29,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:29,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:29,526 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 22:33:29,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 22:33:29,598 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 22:33:29,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 22:33:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:29,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:29,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:29,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849415892] [2021-11-12 22:33:29,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849415892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:29,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:29,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:33:29,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856338860] [2021-11-12 22:33:29,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:29,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:33:29,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:33:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:33:29,858 INFO L87 Difference]: Start difference. First operand 1160 states and 2194 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:33,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:42,466 INFO L93 Difference]: Finished difference Result 4383 states and 8450 transitions. [2021-11-12 22:33:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:33:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:33:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:42,498 INFO L225 Difference]: With dead ends: 4383 [2021-11-12 22:33:42,498 INFO L226 Difference]: Without dead ends: 3317 [2021-11-12 22:33:42,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:33:42,507 INFO L933 BasicCegarLoop]: 3165 mSDtfsCounter, 3291 mSDsluCounter, 5850 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 507 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11043.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4291 SdHoareTripleChecker+Valid, 9015 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.68ms SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12134.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:42,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4291 Valid, 9015 Invalid, 1638 Unknown, 0 Unchecked, 51.68ms Time], IncrementalHoareTripleChecker [507 Valid, 1130 Invalid, 1 Unknown, 0 Unchecked, 12134.20ms Time] [2021-11-12 22:33:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2021-11-12 22:33:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 1162. [2021-11-12 22:33:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 655 states have (on average 1.816793893129771) internal successors, (1190), 1156 states have internal predecessors, (1190), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 22:33:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 2196 transitions. [2021-11-12 22:33:42,972 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 2196 transitions. Word has length 44 [2021-11-12 22:33:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:42,990 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 2196 transitions. [2021-11-12 22:33:42,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 2196 transitions. [2021-11-12 22:33:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:33:42,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:42,996 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:43,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:43,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:43,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:43,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1363006627, now seen corresponding path program 1 times [2021-11-12 22:33:43,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:43,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780725297] [2021-11-12 22:33:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:43,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:43,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:43,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:43,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:33:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:43,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:43,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:43,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:43,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780725297] [2021-11-12 22:33:43,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780725297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:43,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:43,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:33:43,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499505317] [2021-11-12 22:33:43,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:43,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:33:43,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:33:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:33:43,950 INFO L87 Difference]: Start difference. First operand 1162 states and 2196 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:45,016 INFO L93 Difference]: Finished difference Result 2329 states and 4400 transitions. [2021-11-12 22:33:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:33:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-12 22:33:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:45,026 INFO L225 Difference]: With dead ends: 2329 [2021-11-12 22:33:45,026 INFO L226 Difference]: Without dead ends: 1171 [2021-11-12 22:33:45,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:33:45,034 INFO L933 BasicCegarLoop]: 2172 mSDtfsCounter, 2321 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 770.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2824 SdHoareTripleChecker+Valid, 4852 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.69ms SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 908.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:45,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2824 Valid, 4852 Invalid, 578 Unknown, 0 Unchecked, 18.69ms Time], IncrementalHoareTripleChecker [540 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 908.67ms Time] [2021-11-12 22:33:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-11-12 22:33:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1165. [2021-11-12 22:33:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.8009118541033435) internal successors, (1185), 1159 states have internal predecessors, (1185), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 22:33:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2191 transitions. [2021-11-12 22:33:45,320 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2191 transitions. Word has length 96 [2021-11-12 22:33:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:45,322 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2191 transitions. [2021-11-12 22:33:45,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2191 transitions. [2021-11-12 22:33:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:33:45,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:45,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:45,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:45,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:45,542 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-11-12 22:33:45,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:45,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111800292] [2021-11-12 22:33:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:45,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:45,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:45,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:33:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:45,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:46,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:46,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:46,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111800292] [2021-11-12 22:33:46,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111800292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:33:46,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1738366317] [2021-11-12 22:33:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:46,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:46,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:33:46,494 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:33:46,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:33:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:46,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:47,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1738366317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:47,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:33:47,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4] total 5 [2021-11-12 22:33:47,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511858778] [2021-11-12 22:33:47,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:33:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:33:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:33:47,791 INFO L87 Difference]: Start difference. First operand 1165 states and 2191 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:48,759 INFO L93 Difference]: Finished difference Result 3450 states and 6521 transitions. [2021-11-12 22:33:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:33:48,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-12 22:33:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:48,780 INFO L225 Difference]: With dead ends: 3450 [2021-11-12 22:33:48,781 INFO L226 Difference]: Without dead ends: 2289 [2021-11-12 22:33:48,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:33:48,789 INFO L933 BasicCegarLoop]: 2715 mSDtfsCounter, 1104 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 732.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.79ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 761.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:48,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 4865 Invalid, 19 Unknown, 0 Unchecked, 10.79ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 761.85ms Time] [2021-11-12 22:33:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-11-12 22:33:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2021-11-12 22:33:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1279 states have (on average 1.8162627052384674) internal successors, (2323), 2280 states have internal predecessors, (2323), 1004 states have call successors, (1004), 2 states have call predecessors, (1004), 2 states have return successors, (1004), 6 states have call predecessors, (1004), 1004 states have call successors, (1004) [2021-11-12 22:33:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 4331 transitions. [2021-11-12 22:33:49,277 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 4331 transitions. Word has length 96 [2021-11-12 22:33:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:49,278 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 4331 transitions. [2021-11-12 22:33:49,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 4331 transitions. [2021-11-12 22:33:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:33:49,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:49,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:49,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:33:49,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-12 22:33:49,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:49,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash -824271743, now seen corresponding path program 1 times [2021-11-12 22:33:49,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:49,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770509299] [2021-11-12 22:33:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:49,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:49,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:49,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:33:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:33:50,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:33:51,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:51,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770509299] [2021-11-12 22:33:51,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770509299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:51,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:51,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:33:51,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058704926] [2021-11-12 22:33:51,299 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:51,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:33:51,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:51,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:33:51,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:33:51,301 INFO L87 Difference]: Start difference. First operand 2287 states and 4331 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:52,191 INFO L93 Difference]: Finished difference Result 3517 states and 6588 transitions. [2021-11-12 22:33:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:33:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-12 22:33:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:52,212 INFO L225 Difference]: With dead ends: 3517 [2021-11-12 22:33:52,212 INFO L226 Difference]: Without dead ends: 2365 [2021-11-12 22:33:52,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:33:52,220 INFO L933 BasicCegarLoop]: 2716 mSDtfsCounter, 1019 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 619.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 4877 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.25ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 641.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:52,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 4877 Invalid, 16 Unknown, 0 Unchecked, 11.25ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 641.26ms Time] [2021-11-12 22:33:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-11-12 22:33:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2363. [2021-11-12 22:33:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 1355 states have (on average 1.7734317343173431) internal successors, (2403), 2356 states have internal predecessors, (2403), 1004 states have call successors, (1004), 2 states have call predecessors, (1004), 2 states have return successors, (1004), 6 states have call predecessors, (1004), 1004 states have call successors, (1004) [2021-11-12 22:33:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 4411 transitions. [2021-11-12 22:33:52,799 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 4411 transitions. Word has length 103 [2021-11-12 22:33:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:52,800 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 4411 transitions. [2021-11-12 22:33:52,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 4411 transitions. [2021-11-12 22:33:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:33:52,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:52,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:52,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:53,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:53,015 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash -892194403, now seen corresponding path program 1 times [2021-11-12 22:33:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:53,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668575971] [2021-11-12 22:33:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:53,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:53,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:53,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:33:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:53,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:33:53,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:53,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668575971] [2021-11-12 22:33:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668575971] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:33:53,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:33:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:33:53,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186691819] [2021-11-12 22:33:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:53,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:33:53,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:33:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:33:53,787 INFO L87 Difference]: Start difference. First operand 2363 states and 4411 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:33:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:54,049 INFO L93 Difference]: Finished difference Result 4684 states and 8780 transitions. [2021-11-12 22:33:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:33:54,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2021-11-12 22:33:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:54,074 INFO L225 Difference]: With dead ends: 4684 [2021-11-12 22:33:54,074 INFO L226 Difference]: Without dead ends: 2366 [2021-11-12 22:33:54,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:33:54,088 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 2 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:54,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6536 Invalid, 13 Unknown, 0 Unchecked, 9.77ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 31.09ms Time] [2021-11-12 22:33:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-11-12 22:33:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2366. [2021-11-12 22:33:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 1357 states have (on average 1.7730287398673545) internal successors, (2406), 2359 states have internal predecessors, (2406), 1004 states have call successors, (1004), 2 states have call predecessors, (1004), 3 states have return successors, (1006), 6 states have call predecessors, (1006), 1004 states have call successors, (1006) [2021-11-12 22:33:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 4416 transitions. [2021-11-12 22:33:54,712 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 4416 transitions. Word has length 111 [2021-11-12 22:33:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:54,713 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 4416 transitions. [2021-11-12 22:33:54,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:33:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 4416 transitions. [2021-11-12 22:33:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:33:54,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:54,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:54,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:54,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:54,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1639947589, now seen corresponding path program 1 times [2021-11-12 22:33:54,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:54,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312304959] [2021-11-12 22:33:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:54,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:54,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:54,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:33:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:55,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:33:55,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:33:55,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:33:55,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:55,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312304959] [2021-11-12 22:33:55,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312304959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:33:55,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699800148] [2021-11-12 22:33:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:55,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:55,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:33:55,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:33:55,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:33:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:33:56,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:33:56,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1699800148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:56,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:33:56,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 22:33:56,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485236160] [2021-11-12 22:33:56,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:56,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:33:56,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:33:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:33:56,760 INFO L87 Difference]: Start difference. First operand 2366 states and 4416 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:33:59,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:02,662 INFO L93 Difference]: Finished difference Result 3646 states and 6741 transitions. [2021-11-12 22:34:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:34:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 113 [2021-11-12 22:34:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:02,677 INFO L225 Difference]: With dead ends: 3646 [2021-11-12 22:34:02,677 INFO L226 Difference]: Without dead ends: 1325 [2021-11-12 22:34:02,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:34:02,693 INFO L933 BasicCegarLoop]: 2182 mSDtfsCounter, 2230 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1003 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5426.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2230 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.94ms SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5690.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:02,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2230 Valid, 3249 Invalid, 1053 Unknown, 0 Unchecked, 17.94ms Time], IncrementalHoareTripleChecker [1003 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 5690.85ms Time] [2021-11-12 22:34:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-12 22:34:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1209. [2021-11-12 22:34:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 701 states have (on average 1.7560627674750358) internal successors, (1231), 1203 states have internal predecessors, (1231), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-12 22:34:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2238 transitions. [2021-11-12 22:34:02,965 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2238 transitions. Word has length 113 [2021-11-12 22:34:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:02,966 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2238 transitions. [2021-11-12 22:34:02,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:34:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2238 transitions. [2021-11-12 22:34:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:34:02,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:02,971 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:34:02,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:03,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:03,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:03,375 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash 137059189, now seen corresponding path program 1 times [2021-11-12 22:34:03,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:03,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136974454] [2021-11-12 22:34:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:03,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:03,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:03,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:34:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:34:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:34:03,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:34:04,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:04,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136974454] [2021-11-12 22:34:04,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136974454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:04,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [626214440] [2021-11-12 22:34:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:04,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:34:04,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:34:04,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:34:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:04,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:34:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:34:04,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:34:05,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [626214440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:05,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594945093] [2021-11-12 22:34:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:05,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:05,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:05,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:34:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:05,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:34:05,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:34:05,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:34:05,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594945093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:05,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:34:05,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-12 22:34:05,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6797293] [2021-11-12 22:34:05,716 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:34:05,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:34:05,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:34:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:34:05,717 INFO L87 Difference]: Start difference. First operand 1209 states and 2238 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:34:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:06,176 INFO L93 Difference]: Finished difference Result 2385 states and 4449 transitions. [2021-11-12 22:34:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:34:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-12 22:34:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:06,188 INFO L225 Difference]: With dead ends: 2385 [2021-11-12 22:34:06,188 INFO L226 Difference]: Without dead ends: 1224 [2021-11-12 22:34:06,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:34:06,194 INFO L933 BasicCegarLoop]: 2179 mSDtfsCounter, 54 mSDsluCounter, 8698 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 10877 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.73ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:06,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 10877 Invalid, 96 Unknown, 0 Unchecked, 16.73ms Time], IncrementalHoareTripleChecker [34 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 147.69ms Time] [2021-11-12 22:34:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-11-12 22:34:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1220. [2021-11-12 22:34:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 711 states have (on average 1.7566807313642756) internal successors, (1249), 1213 states have internal predecessors, (1249), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-12 22:34:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 2256 transitions. [2021-11-12 22:34:06,463 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 2256 transitions. Word has length 120 [2021-11-12 22:34:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 2256 transitions. [2021-11-12 22:34:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:34:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 2256 transitions. [2021-11-12 22:34:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:34:06,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:06,465 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-11-12 22:34:06,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:06,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-12 22:34:06,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 22:34:07,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:07,067 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:07,067 INFO L85 PathProgramCache]: Analyzing trace with hash -14237485, now seen corresponding path program 2 times [2021-11-12 22:34:07,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:07,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842099058] [2021-11-12 22:34:07,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:34:07,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:07,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:07,069 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:07,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:34:07,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:34:07,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:34:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:34:07,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:34:08,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:08,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842099058] [2021-11-12 22:34:08,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842099058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:08,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071791235] [2021-11-12 22:34:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:34:08,111 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:34:08,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:34:08,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:34:08,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:34:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:34:08,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:34:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:34:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2071791235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:09,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067077399] [2021-11-12 22:34:09,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:34:09,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:09,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:09,275 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:09,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:34:09,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:34:09,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:34:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:34:09,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:34:10,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067077399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:10,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:34:10,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 22:34:10,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057416458] [2021-11-12 22:34:10,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:34:10,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:34:10,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:34:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:34:10,427 INFO L87 Difference]: Start difference. First operand 1220 states and 2256 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:34:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:11,705 INFO L93 Difference]: Finished difference Result 2403 states and 4474 transitions. [2021-11-12 22:34:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:34:11,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-12 22:34:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:11,723 INFO L225 Difference]: With dead ends: 2403 [2021-11-12 22:34:11,728 INFO L226 Difference]: Without dead ends: 1233 [2021-11-12 22:34:11,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:34:11,735 INFO L933 BasicCegarLoop]: 2182 mSDtfsCounter, 83 mSDsluCounter, 10907 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 437.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 13089 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.42ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 490.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:11,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 13089 Invalid, 269 Unknown, 0 Unchecked, 16.42ms Time], IncrementalHoareTripleChecker [58 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 490.34ms Time] [2021-11-12 22:34:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-12 22:34:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1227. [2021-11-12 22:34:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 718 states have (on average 1.7493036211699164) internal successors, (1256), 1220 states have internal predecessors, (1256), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-12 22:34:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 2263 transitions. [2021-11-12 22:34:11,992 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 2263 transitions. Word has length 126 [2021-11-12 22:34:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:11,993 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 2263 transitions. [2021-11-12 22:34:11,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:34:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 2263 transitions. [2021-11-12 22:34:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:34:11,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:11,995 INFO L514 BasicCegarLoop]: trace histogram [15, 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] [2021-11-12 22:34:12,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:12,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:12,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:12,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:12,615 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1200200847, now seen corresponding path program 3 times [2021-11-12 22:34:12,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:12,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582299181] [2021-11-12 22:34:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:34:12,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:12,617 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:12,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:34:15,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 22:34:15,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:34:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:34:15,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:34:16,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:16,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582299181] [2021-11-12 22:34:16,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582299181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:16,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55073115] [2021-11-12 22:34:16,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:34:16,572 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:16,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:34:16,572 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:34:16,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:34:41,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 22:34:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:34:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:34:41,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:34:42,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55073115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:42,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228235871] [2021-11-12 22:34:42,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:34:42,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:42,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:42,366 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:42,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_965f478f-2b10-4ffb-88fb-7dcb75da3af6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process