./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8 --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 42f22b71ca501045e9e0edcb0da831d4df6c9a8e36f5c60b39b69b3cb971731d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:53,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:53,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:53,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:53,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:53,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:53,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:53,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:53,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:53,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:53,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:53,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:53,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:53,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:53,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:53,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:53,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:53,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:53,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:53,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:53,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:53,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:53,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:53,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:53,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:53,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:53,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:53,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:53,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:53,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:53,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:53,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:53,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:53,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:53,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:53,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:53,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:53,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:53,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:53,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:53,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:53,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:23:53,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:53,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:53,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:53,352 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:53,352 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:53,352 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:53,352 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:23:53,352 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:53,352 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:53,352 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:23:53,353 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:23:53,353 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:53,353 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:23:53,353 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:23:53,353 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:23:53,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:53,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:23:53,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:23:53,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:23:53,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:53,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:53,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:53,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:53,355 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:53,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:23:53,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:53,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:53,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:53,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:53,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:53,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:53,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:53,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:53,358 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_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42f22b71ca501045e9e0edcb0da831d4df6c9a8e36f5c60b39b69b3cb971731d [2021-11-07 01:23:53,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:53,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:53,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:53,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:53,719 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:53,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product22.cil.c [2021-11-07 01:23:53,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/16abdb661/f95134ee4be4425b8213e048b5a32bcb/FLAG8230c3b9c [2021-11-07 01:23:54,509 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:54,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/sv-benchmarks/c/product-lines/email_spec1_product22.cil.c [2021-11-07 01:23:54,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/16abdb661/f95134ee4be4425b8213e048b5a32bcb/FLAG8230c3b9c [2021-11-07 01:23:54,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/16abdb661/f95134ee4be4425b8213e048b5a32bcb [2021-11-07 01:23:54,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:54,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:54,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:54,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:54,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:54,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:54" (1/1) ... [2021-11-07 01:23:54,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26893efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:54, skipping insertion in model container [2021-11-07 01:23:54,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:54" (1/1) ... [2021-11-07 01:23:54,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:54,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:55,347 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_d7407af6-8021-4de0-b8be-1e05b495dee8/sv-benchmarks/c/product-lines/email_spec1_product22.cil.c[33239,33252] [2021-11-07 01:23:55,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:55,511 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) [2021-11-07 01:23:55,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47c80e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:55, skipping insertion in model container [2021-11-07 01:23:55,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:55,512 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:23:55,515 INFO L168 Benchmark]: Toolchain (without parser) took 818.03 ms. Allocated memory is still 123.7 MB. Free memory was 83.7 MB in the beginning and 86.8 MB in the end (delta: -3.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:55,517 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 123.7 MB. Free memory is still 102.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:23:55,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 813.37 ms. Allocated memory is still 123.7 MB. Free memory was 83.6 MB in the beginning and 86.8 MB in the end (delta: -3.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:55,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 123.7 MB. Free memory is still 102.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 813.37 ms. Allocated memory is still 123.7 MB. Free memory was 83.6 MB in the beginning and 86.8 MB in the end (delta: -3.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8 --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 42f22b71ca501045e9e0edcb0da831d4df6c9a8e36f5c60b39b69b3cb971731d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:57,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:57,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:57,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:57,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:57,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:57,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:57,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:57,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:57,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:57,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:57,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:57,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:57,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:57,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:57,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:57,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:57,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:57,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:57,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:57,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:57,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:57,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:57,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:57,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:57,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:57,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:57,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:57,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:57,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:57,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:57,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:57,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:57,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:57,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:57,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:57,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:57,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:57,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:57,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:57,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:57,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:23:57,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:57,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:57,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:57,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:57,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:57,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:57,957 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:57,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:57,958 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:57,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:57,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:23:57,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:23:57,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:57,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:57,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:57,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:57,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:57,963 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:23:57,963 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:23:57,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:23:57,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:57,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:57,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:57,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:57,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:23:57,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:57,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:57,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:57,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:57,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:57,966 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:23:57,966 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:57,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:57,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:57,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:57,967 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_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42f22b71ca501045e9e0edcb0da831d4df6c9a8e36f5c60b39b69b3cb971731d [2021-11-07 01:23:58,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:58,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:58,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:58,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:58,364 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:58,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product22.cil.c [2021-11-07 01:23:58,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/9825a9663/93df9fe2185b4b50bbbb3b97cd11758a/FLAGf22340122 [2021-11-07 01:23:59,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:59,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/sv-benchmarks/c/product-lines/email_spec1_product22.cil.c [2021-11-07 01:23:59,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/9825a9663/93df9fe2185b4b50bbbb3b97cd11758a/FLAGf22340122 [2021-11-07 01:23:59,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/data/9825a9663/93df9fe2185b4b50bbbb3b97cd11758a [2021-11-07 01:23:59,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:59,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:59,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:59,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:59,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:59,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:59" (1/1) ... [2021-11-07 01:23:59,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c363f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:59, skipping insertion in model container [2021-11-07 01:23:59,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:59" (1/1) ... [2021-11-07 01:23:59,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:59,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:59,962 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_d7407af6-8021-4de0-b8be-1e05b495dee8/sv-benchmarks/c/product-lines/email_spec1_product22.cil.c[33239,33252] [2021-11-07 01:24:00,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:00,136 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:24:00,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:24:00,262 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_d7407af6-8021-4de0-b8be-1e05b495dee8/sv-benchmarks/c/product-lines/email_spec1_product22.cil.c[33239,33252] [2021-11-07 01:24:00,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:00,350 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:24:00,410 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_d7407af6-8021-4de0-b8be-1e05b495dee8/sv-benchmarks/c/product-lines/email_spec1_product22.cil.c[33239,33252] [2021-11-07 01:24:00,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:00,471 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:24:00,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00 WrapperNode [2021-11-07 01:24:00,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:00,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:00,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:24:00,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:24:00,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:00,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:24:00,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:24:00,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:24:00,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:24:00,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:24:00,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:24:00,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:24:00,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (1/1) ... [2021-11-07 01:24:00,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:00,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:24:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:24:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:24:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:24:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:24:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:24:00,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:24:05,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:24:05,159 INFO L299 CfgBuilder]: Removed 319 assume(true) statements. [2021-11-07 01:24:05,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:05 BoogieIcfgContainer [2021-11-07 01:24:05,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:24:05,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:24:05,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:24:05,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:24:05,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:23:59" (1/3) ... [2021-11-07 01:24:05,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc869f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:05, skipping insertion in model container [2021-11-07 01:24:05,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:00" (2/3) ... [2021-11-07 01:24:05,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc869f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:05, skipping insertion in model container [2021-11-07 01:24:05,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:05" (3/3) ... [2021-11-07 01:24:05,169 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product22.cil.c [2021-11-07 01:24:05,174 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:24:05,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:24:05,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:24:05,230 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 [2021-11-07 01:24:05,231 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:24:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 477 states, 474 states have (on average 1.7447257383966244) internal successors, (827), 476 states have internal predecessors, (827), 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) [2021-11-07 01:24:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:24:05,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:05,268 INFO L513 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] [2021-11-07 01:24:05,268 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1950414624, now seen corresponding path program 1 times [2021-11-07 01:24:05,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:05,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711571674] [2021-11-07 01:24:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:05,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:05,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:05,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:05,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:24:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:05,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:24:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:05,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:05,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:05,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711571674] [2021-11-07 01:24:05,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711571674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:05,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:05,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:24:05,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478699273] [2021-11-07 01:24:05,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:24:05,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:24:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:24:06,011 INFO L87 Difference]: Start difference. First operand has 477 states, 474 states have (on average 1.7447257383966244) internal successors, (827), 476 states have internal predecessors, (827), 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) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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) [2021-11-07 01:24:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:06,068 INFO L93 Difference]: Finished difference Result 708 states and 1206 transitions. [2021-11-07 01:24:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:24:06,069 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 41 [2021-11-07 01:24:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:06,085 INFO L225 Difference]: With dead ends: 708 [2021-11-07 01:24:06,085 INFO L226 Difference]: Without dead ends: 400 [2021-11-07 01:24:06,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:24:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-07 01:24:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-11-07 01:24:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7487437185929648) internal successors, (696), 399 states have internal predecessors, (696), 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) [2021-11-07 01:24:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 696 transitions. [2021-11-07 01:24:06,159 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 696 transitions. Word has length 41 [2021-11-07 01:24:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:06,160 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 696 transitions. [2021-11-07 01:24:06,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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) [2021-11-07 01:24:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 696 transitions. [2021-11-07 01:24:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:24:06,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:06,165 INFO L513 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] [2021-11-07 01:24:06,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:06,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:06,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1842026669, now seen corresponding path program 1 times [2021-11-07 01:24:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:06,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115693433] [2021-11-07 01:24:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:06,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:06,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:06,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:24:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:24:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:06,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:07,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:07,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115693433] [2021-11-07 01:24:07,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115693433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:07,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:07,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:07,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268196014] [2021-11-07 01:24:07,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:07,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:07,075 INFO L87 Difference]: Start difference. First operand 400 states and 696 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-07 01:24:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:07,199 INFO L93 Difference]: Finished difference Result 1170 states and 2040 transitions. [2021-11-07 01:24:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 42 [2021-11-07 01:24:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:07,207 INFO L225 Difference]: With dead ends: 1170 [2021-11-07 01:24:07,207 INFO L226 Difference]: Without dead ends: 785 [2021-11-07 01:24:07,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-07 01:24:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 399. [2021-11-07 01:24:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7405541561712847) internal successors, (691), 398 states have internal predecessors, (691), 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) [2021-11-07 01:24:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 691 transitions. [2021-11-07 01:24:07,266 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 691 transitions. Word has length 42 [2021-11-07 01:24:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:07,266 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 691 transitions. [2021-11-07 01:24:07,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-07 01:24:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 691 transitions. [2021-11-07 01:24:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:24:07,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:07,270 INFO L513 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] [2021-11-07 01:24:07,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:07,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:07,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1637700947, now seen corresponding path program 1 times [2021-11-07 01:24:07,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:07,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392769580] [2021-11-07 01:24:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:07,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:07,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:07,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:07,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:24:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:24:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:08,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:08,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392769580] [2021-11-07 01:24:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392769580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:08,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:08,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:08,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092918043] [2021-11-07 01:24:08,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:08,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:08,205 INFO L87 Difference]: Start difference. First operand 399 states and 691 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2021-11-07 01:24:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:08,468 INFO L93 Difference]: Finished difference Result 1513 states and 2626 transitions. [2021-11-07 01:24:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:24:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 [2021-11-07 01:24:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:08,482 INFO L225 Difference]: With dead ends: 1513 [2021-11-07 01:24:08,482 INFO L226 Difference]: Without dead ends: 1132 [2021-11-07 01:24:08,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-11-07 01:24:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 398. [2021-11-07 01:24:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 396 states have (on average 1.7348484848484849) internal successors, (687), 397 states have internal predecessors, (687), 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) [2021-11-07 01:24:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 687 transitions. [2021-11-07 01:24:08,524 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 687 transitions. Word has length 44 [2021-11-07 01:24:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:08,525 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 687 transitions. [2021-11-07 01:24:08,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2021-11-07 01:24:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 687 transitions. [2021-11-07 01:24:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:24:08,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:08,532 INFO L513 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, 1] [2021-11-07 01:24:08,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:08,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:08,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:08,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash -743733638, now seen corresponding path program 1 times [2021-11-07 01:24:08,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:08,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146303570] [2021-11-07 01:24:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:08,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:08,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:08,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:24:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:24:09,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:09,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:09,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:09,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146303570] [2021-11-07 01:24:09,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146303570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:09,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:09,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:09,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959582821] [2021-11-07 01:24:09,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:09,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:09,395 INFO L87 Difference]: Start difference. First operand 398 states and 687 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-11-07 01:24:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:09,460 INFO L93 Difference]: Finished difference Result 793 states and 1371 transitions. [2021-11-07 01:24:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 45 [2021-11-07 01:24:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:09,464 INFO L225 Difference]: With dead ends: 793 [2021-11-07 01:24:09,464 INFO L226 Difference]: Without dead ends: 403 [2021-11-07 01:24:09,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-07 01:24:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 398. [2021-11-07 01:24:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 396 states have (on average 1.7272727272727273) internal successors, (684), 397 states have internal predecessors, (684), 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) [2021-11-07 01:24:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 684 transitions. [2021-11-07 01:24:09,492 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 684 transitions. Word has length 45 [2021-11-07 01:24:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:09,492 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 684 transitions. [2021-11-07 01:24:09,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-11-07 01:24:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 684 transitions. [2021-11-07 01:24:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:24:09,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:09,494 INFO L513 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, 1, 1] [2021-11-07 01:24:09,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:09,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:09,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:09,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1616651461, now seen corresponding path program 1 times [2021-11-07 01:24:09,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:09,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125585030] [2021-11-07 01:24:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:09,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:09,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:09,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:24:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:24:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:10,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:10,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125585030] [2021-11-07 01:24:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125585030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:10,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:10,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:10,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446792300] [2021-11-07 01:24:10,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:10,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:10,416 INFO L87 Difference]: Start difference. First operand 398 states and 684 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 01:24:10,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:10,678 INFO L93 Difference]: Finished difference Result 1500 states and 2602 transitions. [2021-11-07 01:24:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:24:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 46 [2021-11-07 01:24:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:10,687 INFO L225 Difference]: With dead ends: 1500 [2021-11-07 01:24:10,687 INFO L226 Difference]: Without dead ends: 1128 [2021-11-07 01:24:10,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-11-07 01:24:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 398. [2021-11-07 01:24:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 396 states have (on average 1.7196969696969697) internal successors, (681), 397 states have internal predecessors, (681), 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) [2021-11-07 01:24:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 681 transitions. [2021-11-07 01:24:10,727 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 681 transitions. Word has length 46 [2021-11-07 01:24:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:10,729 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 681 transitions. [2021-11-07 01:24:10,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 01:24:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 681 transitions. [2021-11-07 01:24:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:24:10,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:10,731 INFO L513 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, 1, 1, 1, 1] [2021-11-07 01:24:10,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:10,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:10,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -781817814, now seen corresponding path program 1 times [2021-11-07 01:24:10,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:10,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227334821] [2021-11-07 01:24:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:10,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:10,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:10,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:10,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:24:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:11,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:11,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227334821] [2021-11-07 01:24:11,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227334821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:11,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:11,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:11,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136400920] [2021-11-07 01:24:11,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:11,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:11,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:11,640 INFO L87 Difference]: Start difference. First operand 398 states and 681 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 01:24:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:11,724 INFO L93 Difference]: Finished difference Result 924 states and 1583 transitions. [2021-11-07 01:24:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 48 [2021-11-07 01:24:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:11,730 INFO L225 Difference]: With dead ends: 924 [2021-11-07 01:24:11,730 INFO L226 Difference]: Without dead ends: 770 [2021-11-07 01:24:11,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-07 01:24:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 616. [2021-11-07 01:24:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 614 states have (on average 1.757328990228013) internal successors, (1079), 615 states have internal predecessors, (1079), 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) [2021-11-07 01:24:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1079 transitions. [2021-11-07 01:24:11,781 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1079 transitions. Word has length 48 [2021-11-07 01:24:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:11,783 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1079 transitions. [2021-11-07 01:24:11,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 01:24:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1079 transitions. [2021-11-07 01:24:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:24:11,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:11,786 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:11,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:11,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:12,000 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1738555175, now seen corresponding path program 1 times [2021-11-07 01:24:12,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:12,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311976582] [2021-11-07 01:24:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:12,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:12,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:12,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:12,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:24:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:12,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:12,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:12,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311976582] [2021-11-07 01:24:12,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311976582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:12,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:12,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:12,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839823648] [2021-11-07 01:24:12,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:12,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:12,759 INFO L87 Difference]: Start difference. First operand 616 states and 1079 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-07 01:24:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:12,836 INFO L93 Difference]: Finished difference Result 1468 states and 2578 transitions. [2021-11-07 01:24:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-07 01:24:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:12,843 INFO L225 Difference]: With dead ends: 1468 [2021-11-07 01:24:12,843 INFO L226 Difference]: Without dead ends: 936 [2021-11-07 01:24:12,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:12,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-11-07 01:24:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 782. [2021-11-07 01:24:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 780 states have (on average 1.7692307692307692) internal successors, (1380), 781 states have internal predecessors, (1380), 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) [2021-11-07 01:24:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1380 transitions. [2021-11-07 01:24:12,909 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1380 transitions. Word has length 60 [2021-11-07 01:24:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:12,910 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1380 transitions. [2021-11-07 01:24:12,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-07 01:24:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1380 transitions. [2021-11-07 01:24:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:24:12,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:12,913 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:12,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:24:13,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:13,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash -917943974, now seen corresponding path program 1 times [2021-11-07 01:24:13,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:13,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34108677] [2021-11-07 01:24:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:13,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:13,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:13,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:24:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:13,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:13,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:13,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34108677] [2021-11-07 01:24:13,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34108677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:13,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:13,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:13,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103977476] [2021-11-07 01:24:13,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:13,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:13,877 INFO L87 Difference]: Start difference. First operand 782 states and 1380 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2021-11-07 01:24:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:13,988 INFO L93 Difference]: Finished difference Result 1998 states and 3546 transitions. [2021-11-07 01:24:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2021-11-07 01:24:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:14,005 INFO L225 Difference]: With dead ends: 1998 [2021-11-07 01:24:14,005 INFO L226 Difference]: Without dead ends: 1308 [2021-11-07 01:24:14,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-07 01:24:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1154. [2021-11-07 01:24:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1152 states have (on average 1.7864583333333333) internal successors, (2058), 1153 states have internal predecessors, (2058), 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) [2021-11-07 01:24:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2058 transitions. [2021-11-07 01:24:14,124 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2058 transitions. Word has length 61 [2021-11-07 01:24:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:14,124 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 2058 transitions. [2021-11-07 01:24:14,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2021-11-07 01:24:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2058 transitions. [2021-11-07 01:24:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:24:14,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:14,127 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:14,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:14,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:14,341 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash -995347605, now seen corresponding path program 1 times [2021-11-07 01:24:14,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:14,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584823384] [2021-11-07 01:24:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:14,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:14,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:14,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:14,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:24:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:14,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:15,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:15,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584823384] [2021-11-07 01:24:15,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584823384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:15,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:15,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:15,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873829945] [2021-11-07 01:24:15,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:15,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:15,132 INFO L87 Difference]: Start difference. First operand 1154 states and 2058 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-07 01:24:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:15,291 INFO L93 Difference]: Finished difference Result 3094 states and 5549 transitions. [2021-11-07 01:24:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-07 01:24:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:15,305 INFO L225 Difference]: With dead ends: 3094 [2021-11-07 01:24:15,305 INFO L226 Difference]: Without dead ends: 2040 [2021-11-07 01:24:15,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-11-07 01:24:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1886. [2021-11-07 01:24:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1884 states have (on average 1.8009554140127388) internal successors, (3393), 1885 states have internal predecessors, (3393), 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) [2021-11-07 01:24:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3393 transitions. [2021-11-07 01:24:15,488 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3393 transitions. Word has length 62 [2021-11-07 01:24:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:15,488 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 3393 transitions. [2021-11-07 01:24:15,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-07 01:24:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3393 transitions. [2021-11-07 01:24:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:24:15,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:15,493 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:15,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:15,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:15,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash -167852565, now seen corresponding path program 1 times [2021-11-07 01:24:15,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:15,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542560738] [2021-11-07 01:24:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:15,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:15,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:15,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:24:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:16,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:16,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:16,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542560738] [2021-11-07 01:24:16,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542560738] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:16,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:16,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:16,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612326804] [2021-11-07 01:24:16,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:16,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:16,450 INFO L87 Difference]: Start difference. First operand 1886 states and 3393 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 01:24:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:16,663 INFO L93 Difference]: Finished difference Result 5026 states and 9073 transitions. [2021-11-07 01:24:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 01:24:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:16,683 INFO L225 Difference]: With dead ends: 5026 [2021-11-07 01:24:16,683 INFO L226 Difference]: Without dead ends: 3274 [2021-11-07 01:24:16,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2021-11-07 01:24:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 3120. [2021-11-07 01:24:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3118 states have (on average 1.8082103912764593) internal successors, (5638), 3119 states have internal predecessors, (5638), 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) [2021-11-07 01:24:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 5638 transitions. [2021-11-07 01:24:16,928 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 5638 transitions. Word has length 63 [2021-11-07 01:24:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:16,929 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 5638 transitions. [2021-11-07 01:24:16,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 01:24:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 5638 transitions. [2021-11-07 01:24:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:24:16,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:16,933 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:16,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:17,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:17,147 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash -596855078, now seen corresponding path program 1 times [2021-11-07 01:24:17,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:17,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877827256] [2021-11-07 01:24:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:17,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:17,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:17,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:24:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:17,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:17,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:17,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:17,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877827256] [2021-11-07 01:24:17,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877827256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:17,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:17,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:17,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99383827] [2021-11-07 01:24:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:17,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:17,883 INFO L87 Difference]: Start difference. First operand 3120 states and 5638 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 01:24:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:18,263 INFO L93 Difference]: Finished difference Result 8444 states and 15291 transitions. [2021-11-07 01:24:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 01:24:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:18,307 INFO L225 Difference]: With dead ends: 8444 [2021-11-07 01:24:18,307 INFO L226 Difference]: Without dead ends: 5492 [2021-11-07 01:24:18,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-11-07 01:24:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5338. [2021-11-07 01:24:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5336 states have (on average 1.8109070464767616) internal successors, (9663), 5337 states have internal predecessors, (9663), 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) [2021-11-07 01:24:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 9663 transitions. [2021-11-07 01:24:18,716 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 9663 transitions. Word has length 64 [2021-11-07 01:24:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:18,716 INFO L470 AbstractCegarLoop]: Abstraction has 5338 states and 9663 transitions. [2021-11-07 01:24:18,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 01:24:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 9663 transitions. [2021-11-07 01:24:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:24:18,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:18,721 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:18,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:18,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:18,936 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash -878340486, now seen corresponding path program 1 times [2021-11-07 01:24:18,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:18,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722107123] [2021-11-07 01:24:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:18,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:18,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:24:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:19,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:19,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:19,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722107123] [2021-11-07 01:24:19,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722107123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:19,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:19,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:19,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700924230] [2021-11-07 01:24:19,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:19,767 INFO L87 Difference]: Start difference. First operand 5338 states and 9663 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-07 01:24:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:20,393 INFO L93 Difference]: Finished difference Result 15424 states and 27977 transitions. [2021-11-07 01:24:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2021-11-07 01:24:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:20,459 INFO L225 Difference]: With dead ends: 15424 [2021-11-07 01:24:20,460 INFO L226 Difference]: Without dead ends: 10262 [2021-11-07 01:24:20,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10262 states. [2021-11-07 01:24:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10262 to 10108. [2021-11-07 01:24:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10108 states, 10106 states have (on average 1.8127844844646746) internal successors, (18320), 10107 states have internal predecessors, (18320), 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) [2021-11-07 01:24:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10108 states to 10108 states and 18320 transitions. [2021-11-07 01:24:21,165 INFO L78 Accepts]: Start accepts. Automaton has 10108 states and 18320 transitions. Word has length 65 [2021-11-07 01:24:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:21,165 INFO L470 AbstractCegarLoop]: Abstraction has 10108 states and 18320 transitions. [2021-11-07 01:24:21,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-07 01:24:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10108 states and 18320 transitions. [2021-11-07 01:24:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:24:21,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:21,174 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:21,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:21,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:21,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1971763830, now seen corresponding path program 1 times [2021-11-07 01:24:21,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:21,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141425574] [2021-11-07 01:24:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:21,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:21,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:21,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:24:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:21,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:21,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:22,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:22,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:22,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141425574] [2021-11-07 01:24:22,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141425574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:22,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:22,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:22,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435264590] [2021-11-07 01:24:22,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:22,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:22,350 INFO L87 Difference]: Start difference. First operand 10108 states and 18320 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-07 01:24:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:25,609 INFO L93 Difference]: Finished difference Result 24883 states and 45113 transitions. [2021-11-07 01:24:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:24:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 66 [2021-11-07 01:24:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:25,653 INFO L225 Difference]: With dead ends: 24883 [2021-11-07 01:24:25,654 INFO L226 Difference]: Without dead ends: 15029 [2021-11-07 01:24:25,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15029 states. [2021-11-07 01:24:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15029 to 10075. [2021-11-07 01:24:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10075 states, 10073 states have (on average 1.8056189814355208) internal successors, (18188), 10074 states have internal predecessors, (18188), 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) [2021-11-07 01:24:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10075 states to 10075 states and 18188 transitions. [2021-11-07 01:24:26,435 INFO L78 Accepts]: Start accepts. Automaton has 10075 states and 18188 transitions. Word has length 66 [2021-11-07 01:24:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:26,436 INFO L470 AbstractCegarLoop]: Abstraction has 10075 states and 18188 transitions. [2021-11-07 01:24:26,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-07 01:24:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 10075 states and 18188 transitions. [2021-11-07 01:24:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:24:26,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:26,442 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:26,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:26,659 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:26,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2037868107, now seen corresponding path program 1 times [2021-11-07 01:24:26,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:26,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091164214] [2021-11-07 01:24:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:26,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:26,662 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:26,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:24:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:27,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:27,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:27,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091164214] [2021-11-07 01:24:27,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091164214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:27,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:27,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:27,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108338386] [2021-11-07 01:24:27,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:27,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:27,771 INFO L87 Difference]: Start difference. First operand 10075 states and 18188 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 01:24:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:29,136 INFO L93 Difference]: Finished difference Result 29467 states and 53259 transitions. [2021-11-07 01:24:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:24:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:29,204 INFO L225 Difference]: With dead ends: 29467 [2021-11-07 01:24:29,204 INFO L226 Difference]: Without dead ends: 19575 [2021-11-07 01:24:29,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19575 states. [2021-11-07 01:24:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19575 to 19421. [2021-11-07 01:24:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19421 states, 19419 states have (on average 1.8050878006076523) internal successors, (35053), 19420 states have internal predecessors, (35053), 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) [2021-11-07 01:24:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19421 states to 19421 states and 35053 transitions. [2021-11-07 01:24:30,320 INFO L78 Accepts]: Start accepts. Automaton has 19421 states and 35053 transitions. Word has length 66 [2021-11-07 01:24:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:30,320 INFO L470 AbstractCegarLoop]: Abstraction has 19421 states and 35053 transitions. [2021-11-07 01:24:30,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 01:24:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19421 states and 35053 transitions. [2021-11-07 01:24:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:24:30,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:30,327 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:30,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:24:30,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:30,542 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash -888099957, now seen corresponding path program 1 times [2021-11-07 01:24:30,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:30,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460333363] [2021-11-07 01:24:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:30,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:30,544 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:30,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:24:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:31,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:31,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:31,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460333363] [2021-11-07 01:24:31,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460333363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:31,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:31,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:31,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388798131] [2021-11-07 01:24:31,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:31,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:31,580 INFO L87 Difference]: Start difference. First operand 19421 states and 35053 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 01:24:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:33,531 INFO L93 Difference]: Finished difference Result 57691 states and 104168 transitions. [2021-11-07 01:24:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-07 01:24:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:33,614 INFO L225 Difference]: With dead ends: 57691 [2021-11-07 01:24:33,615 INFO L226 Difference]: Without dead ends: 38457 [2021-11-07 01:24:33,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38457 states. [2021-11-07 01:24:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38457 to 38303. [2021-11-07 01:24:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38303 states, 38301 states have (on average 1.802511683768048) internal successors, (69038), 38302 states have internal predecessors, (69038), 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) [2021-11-07 01:24:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38303 states to 38303 states and 69038 transitions. [2021-11-07 01:24:35,760 INFO L78 Accepts]: Start accepts. Automaton has 38303 states and 69038 transitions. Word has length 67 [2021-11-07 01:24:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:35,761 INFO L470 AbstractCegarLoop]: Abstraction has 38303 states and 69038 transitions. [2021-11-07 01:24:35,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 01:24:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38303 states and 69038 transitions. [2021-11-07 01:24:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:24:35,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:35,770 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:24:35,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:24:35,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:35,986 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash 402698884, now seen corresponding path program 1 times [2021-11-07 01:24:35,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:35,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853911780] [2021-11-07 01:24:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:35,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:35,990 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:36,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:24:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:36,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:24:36,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:24:37,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:37,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853911780] [2021-11-07 01:24:37,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853911780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:37,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:37,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:37,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539763884] [2021-11-07 01:24:37,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:37,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:37,169 INFO L87 Difference]: Start difference. First operand 38303 states and 69038 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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) [2021-11-07 01:24:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:44,239 INFO L93 Difference]: Finished difference Result 148609 states and 267699 transitions. [2021-11-07 01:24:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:24:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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 68 [2021-11-07 01:24:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:44,639 INFO L225 Difference]: With dead ends: 148609 [2021-11-07 01:24:44,639 INFO L226 Difference]: Without dead ends: 110559 [2021-11-07 01:24:44,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110559 states. [2021-11-07 01:24:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110559 to 38045. [2021-11-07 01:24:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38045 states, 38043 states have (on average 1.787608758510107) internal successors, (68006), 38044 states have internal predecessors, (68006), 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) [2021-11-07 01:24:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38045 states to 38045 states and 68006 transitions. [2021-11-07 01:24:48,398 INFO L78 Accepts]: Start accepts. Automaton has 38045 states and 68006 transitions. Word has length 68 [2021-11-07 01:24:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:48,398 INFO L470 AbstractCegarLoop]: Abstraction has 38045 states and 68006 transitions. [2021-11-07 01:24:48,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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) [2021-11-07 01:24:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38045 states and 68006 transitions. [2021-11-07 01:24:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:24:48,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:48,406 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:48,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:48,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:48,610 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1636782758, now seen corresponding path program 1 times [2021-11-07 01:24:48,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:48,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122553446] [2021-11-07 01:24:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:48,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:48,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:48,612 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:48,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:24:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:49,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:49,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:49,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:49,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122553446] [2021-11-07 01:24:49,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122553446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:49,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:49,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:49,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435776079] [2021-11-07 01:24:49,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:49,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:49,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:49,679 INFO L87 Difference]: Start difference. First operand 38045 states and 68006 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-07 01:24:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:51,731 INFO L93 Difference]: Finished difference Result 75985 states and 135836 transitions. [2021-11-07 01:24:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 68 [2021-11-07 01:24:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:51,795 INFO L225 Difference]: With dead ends: 75985 [2021-11-07 01:24:51,795 INFO L226 Difference]: Without dead ends: 38199 [2021-11-07 01:24:51,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38199 states. [2021-11-07 01:24:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38199 to 38045. [2021-11-07 01:24:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38045 states, 38043 states have (on average 1.7842441447835344) internal successors, (67878), 38044 states have internal predecessors, (67878), 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) [2021-11-07 01:24:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38045 states to 38045 states and 67878 transitions. [2021-11-07 01:24:54,362 INFO L78 Accepts]: Start accepts. Automaton has 38045 states and 67878 transitions. Word has length 68 [2021-11-07 01:24:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:54,362 INFO L470 AbstractCegarLoop]: Abstraction has 38045 states and 67878 transitions. [2021-11-07 01:24:54,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-07 01:24:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 38045 states and 67878 transitions. [2021-11-07 01:24:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:24:54,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:54,372 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:54,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:24:54,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:54,586 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1893181287, now seen corresponding path program 1 times [2021-11-07 01:24:54,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:54,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930032290] [2021-11-07 01:24:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:54,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:54,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:54,588 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:54,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:24:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:55,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:55,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:55,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930032290] [2021-11-07 01:24:55,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930032290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:55,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:55,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805516671] [2021-11-07 01:24:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:55,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:55,659 INFO L87 Difference]: Start difference. First operand 38045 states and 67878 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 01:24:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:59,600 INFO L93 Difference]: Finished difference Result 105723 states and 188262 transitions. [2021-11-07 01:24:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-07 01:24:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:59,741 INFO L225 Difference]: With dead ends: 105723 [2021-11-07 01:24:59,741 INFO L226 Difference]: Without dead ends: 67897 [2021-11-07 01:24:59,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67897 states. [2021-11-07 01:25:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67897 to 67743. [2021-11-07 01:25:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67743 states, 67741 states have (on average 1.7748630814425532) internal successors, (120231), 67742 states have internal predecessors, (120231), 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) [2021-11-07 01:25:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67743 states to 67743 states and 120231 transitions. [2021-11-07 01:25:04,077 INFO L78 Accepts]: Start accepts. Automaton has 67743 states and 120231 transitions. Word has length 68 [2021-11-07 01:25:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:04,078 INFO L470 AbstractCegarLoop]: Abstraction has 67743 states and 120231 transitions. [2021-11-07 01:25:04,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 01:25:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 67743 states and 120231 transitions. [2021-11-07 01:25:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:25:04,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:04,083 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:25:04,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:04,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:04,287 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 939956128, now seen corresponding path program 1 times [2021-11-07 01:25:04,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:04,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522079821] [2021-11-07 01:25:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:04,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:04,290 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:04,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:25:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:05,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:05,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:05,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:05,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522079821] [2021-11-07 01:25:05,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522079821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:05,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717523672] [2021-11-07 01:25:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:05,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:05,658 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:05,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7407af6-8021-4de0-b8be-1e05b495dee8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:25:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:25:06,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:25:07,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1717523672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:07,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:07,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:25:07,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079602121] [2021-11-07 01:25:07,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:07,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:25:07,292 INFO L87 Difference]: Start difference. First operand 67743 states and 120231 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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)