./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product15.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_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/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_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/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_f3707abd-18cc-4cec-87de-804dbf4bd99a/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 3a5e24a2ecd4f1b82ac6c9f3672db1eec2c6845bb52ab38fa9dd83ecce424f6f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:21,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:21,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:21,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:21,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:21,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:21,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:21,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:21,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:21,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:21,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:21,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:21,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:21,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:21,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:21,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:21,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:21,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:21,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:21,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:21,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:21,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:21,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:21,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:21,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:21,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:21,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:21,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:21,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:21,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:21,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:21,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:21,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:21,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:21,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:21,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:21,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:21,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:21,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:21,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:21,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:21,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:25:21,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:21,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:21,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:21,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:21,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:21,640 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:21,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:21,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:21,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:21,648 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:21,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:21,649 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:21,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:21,650 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:21,650 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:21,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:21,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:21,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:21,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:21,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:21,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:21,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:21,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:21,652 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:21,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:21,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:21,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:21,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:21,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:21,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:21,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:21,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:21,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:21,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:21,656 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:21,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:21,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:21,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:21,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:21,657 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a5e24a2ecd4f1b82ac6c9f3672db1eec2c6845bb52ab38fa9dd83ecce424f6f [2021-11-07 01:25:21,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:21,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:21,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:21,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:21,956 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:21,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product15.cil.c [2021-11-07 01:25:22,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/820252e5b/8be66134128346d89a6060797ef931bf/FLAGce93dd98a [2021-11-07 01:25:22,596 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:22,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/sv-benchmarks/c/product-lines/email_spec9_product15.cil.c [2021-11-07 01:25:22,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/820252e5b/8be66134128346d89a6060797ef931bf/FLAGce93dd98a [2021-11-07 01:25:22,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/820252e5b/8be66134128346d89a6060797ef931bf [2021-11-07 01:25:22,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:22,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:22,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:22,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:22,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:22,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:22" (1/1) ... [2021-11-07 01:25:22,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7968a0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:22, skipping insertion in model container [2021-11-07 01:25:22,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:22" (1/1) ... [2021-11-07 01:25:22,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:22,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:23,471 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/sv-benchmarks/c/product-lines/email_spec9_product15.cil.c[51080,51093] [2021-11-07 01:25:23,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:23,595 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 01:25:23,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18b3097d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:23, skipping insertion in model container [2021-11-07 01:25:23,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:23,596 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:23,599 INFO L168 Benchmark]: Toolchain (without parser) took 744.88 ms. Allocated memory is still 115.3 MB. Free memory was 74.4 MB in the beginning and 78.0 MB in the end (delta: -3.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:23,600 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 115.3 MB. Free memory was 93.3 MB in the beginning and 93.1 MB in the end (delta: 128.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:23,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.85 ms. Allocated memory is still 115.3 MB. Free memory was 74.3 MB in the beginning and 78.0 MB in the end (delta: -3.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:23,605 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 115.3 MB. Free memory was 93.3 MB in the beginning and 93.1 MB in the end (delta: 128.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 732.85 ms. Allocated memory is still 115.3 MB. Free memory was 74.3 MB in the beginning and 78.0 MB in the end (delta: -3.7 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: 781]: 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/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_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/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_f3707abd-18cc-4cec-87de-804dbf4bd99a/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 3a5e24a2ecd4f1b82ac6c9f3672db1eec2c6845bb52ab38fa9dd83ecce424f6f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:25,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:25,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:25,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:25,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:25,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:25,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:25,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:25,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:25,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:25,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:25,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:25,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:25,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:25,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:25,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:25,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:25,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:25,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:25,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:25,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:25,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:25,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:25,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:25,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:25,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:25,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:25,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:25,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:25,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:25,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:25,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:25,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:25,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:25,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:25,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:25,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:25,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:25,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:25,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:25,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:25,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:25:26,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:26,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:26,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:26,006 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:26,006 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:26,006 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:26,006 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:26,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:26,007 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:26,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:26,009 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:26,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:26,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:26,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:26,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:26,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:26,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:26,011 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:26,011 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:26,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:26,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:26,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:26,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:26,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:26,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:26,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:26,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:26,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:26,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:26,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:26,014 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:26,014 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:26,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:26,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:26,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:26,015 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a5e24a2ecd4f1b82ac6c9f3672db1eec2c6845bb52ab38fa9dd83ecce424f6f [2021-11-07 01:25:26,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:26,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:26,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:26,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:26,420 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:26,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product15.cil.c [2021-11-07 01:25:26,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/dcb15f5e0/161caff3272d44889f39dfdb7c53ecc3/FLAGa41bfde65 [2021-11-07 01:25:27,207 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:27,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/sv-benchmarks/c/product-lines/email_spec9_product15.cil.c [2021-11-07 01:25:27,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/dcb15f5e0/161caff3272d44889f39dfdb7c53ecc3/FLAGa41bfde65 [2021-11-07 01:25:27,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/data/dcb15f5e0/161caff3272d44889f39dfdb7c53ecc3 [2021-11-07 01:25:27,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:27,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:27,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:27,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:27,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:27,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:27" (1/1) ... [2021-11-07 01:25:27,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1545f847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:27, skipping insertion in model container [2021-11-07 01:25:27,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:27" (1/1) ... [2021-11-07 01:25:27,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:27,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:28,106 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/sv-benchmarks/c/product-lines/email_spec9_product15.cil.c[51080,51093] [2021-11-07 01:25:28,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:28,178 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:28,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:28,267 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/sv-benchmarks/c/product-lines/email_spec9_product15.cil.c[51080,51093] [2021-11-07 01:25:28,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:28,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:28,395 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_f3707abd-18cc-4cec-87de-804dbf4bd99a/sv-benchmarks/c/product-lines/email_spec9_product15.cil.c[51080,51093] [2021-11-07 01:25:28,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:28,480 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:28,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28 WrapperNode [2021-11-07 01:25:28,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:28,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:28,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:28,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:28,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:28,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:28,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:28,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:28,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:28,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:28,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:28,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:28,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (1/1) ... [2021-11-07 01:25:28,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:28,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:28,848 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:25:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:28,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:28,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:28,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:25:33,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:25:33,044 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 01:25:33,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:33 BoogieIcfgContainer [2021-11-07 01:25:33,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:25:33,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:25:33,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:25:33,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:25:33,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:27" (1/3) ... [2021-11-07 01:25:33,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a3c774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:33, skipping insertion in model container [2021-11-07 01:25:33,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:28" (2/3) ... [2021-11-07 01:25:33,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a3c774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:33, skipping insertion in model container [2021-11-07 01:25:33,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:33" (3/3) ... [2021-11-07 01:25:33,056 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product15.cil.c [2021-11-07 01:25:33,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:25:33,061 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:25:33,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:25:33,124 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 01:25:33,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:25:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 408 states have (on average 1.7647058823529411) internal successors, (720), 410 states have internal predecessors, (720), 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 01:25:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:25:33,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:33,189 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 01:25:33,190 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash 827013746, now seen corresponding path program 1 times [2021-11-07 01:25:33,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:33,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414973941] [2021-11-07 01:25:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:33,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:33,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:33,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:33,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:25:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:25:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:33,897 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 01:25:33,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:33,999 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 01:25:34,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:34,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414973941] [2021-11-07 01:25:34,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414973941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:34,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:34,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:25:34,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427260961] [2021-11-07 01:25:34,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:25:34,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:25:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:34,030 INFO L87 Difference]: Start difference. First operand has 411 states, 408 states have (on average 1.7647058823529411) internal successors, (720), 410 states have internal predecessors, (720), 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 01:25:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:34,095 INFO L93 Difference]: Finished difference Result 580 states and 999 transitions. [2021-11-07 01:25:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:25:34,096 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 01:25:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:34,111 INFO L225 Difference]: With dead ends: 580 [2021-11-07 01:25:34,112 INFO L226 Difference]: Without dead ends: 365 [2021-11-07 01:25:34,115 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 01:25:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-07 01:25:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-11-07 01:25:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.7603305785123966) internal successors, (639), 364 states have internal predecessors, (639), 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 01:25:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 639 transitions. [2021-11-07 01:25:34,176 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 639 transitions. Word has length 41 [2021-11-07 01:25:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:34,177 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 639 transitions. [2021-11-07 01:25:34,177 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 01:25:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 639 transitions. [2021-11-07 01:25:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:25:34,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:34,182 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 01:25:34,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:34,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:34,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 935401701, now seen corresponding path program 1 times [2021-11-07 01:25:34,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:34,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818836841] [2021-11-07 01:25:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:34,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:34,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:34,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:34,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:25:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:34,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:25:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:34,935 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 01:25:34,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:35,088 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 01:25:35,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:35,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818836841] [2021-11-07 01:25:35,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818836841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:35,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:35,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833910131] [2021-11-07 01:25:35,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:35,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:35,098 INFO L87 Difference]: Start difference. First operand 365 states and 639 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 01:25:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:35,197 INFO L93 Difference]: Finished difference Result 1065 states and 1869 transitions. [2021-11-07 01:25:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:35,197 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 01:25:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:35,204 INFO L225 Difference]: With dead ends: 1065 [2021-11-07 01:25:35,205 INFO L226 Difference]: Without dead ends: 715 [2021-11-07 01:25:35,210 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 01:25:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-07 01:25:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 364. [2021-11-07 01:25:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.7513812154696133) internal successors, (634), 363 states have internal predecessors, (634), 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 01:25:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 634 transitions. [2021-11-07 01:25:35,264 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 634 transitions. Word has length 42 [2021-11-07 01:25:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:35,265 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 634 transitions. [2021-11-07 01:25:35,265 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 01:25:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 634 transitions. [2021-11-07 01:25:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:25:35,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:35,280 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 01:25:35,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:25:35,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:35,501 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1139727423, now seen corresponding path program 1 times [2021-11-07 01:25:35,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:35,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931452113] [2021-11-07 01:25:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:35,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:35,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:35,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:35,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:25:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:25:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:36,032 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 01:25:36,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:36,148 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 01:25:36,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:36,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931452113] [2021-11-07 01:25:36,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931452113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:36,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:36,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:36,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469080722] [2021-11-07 01:25:36,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:36,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:36,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:36,154 INFO L87 Difference]: Start difference. First operand 364 states and 634 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 01:25:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:36,359 INFO L93 Difference]: Finished difference Result 1373 states and 2398 transitions. [2021-11-07 01:25:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:36,359 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 01:25:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:36,370 INFO L225 Difference]: With dead ends: 1373 [2021-11-07 01:25:36,370 INFO L226 Difference]: Without dead ends: 1027 [2021-11-07 01:25:36,372 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 01:25:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-11-07 01:25:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 363. [2021-11-07 01:25:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.745152354570637) internal successors, (630), 362 states have internal predecessors, (630), 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 01:25:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 630 transitions. [2021-11-07 01:25:36,421 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 630 transitions. Word has length 44 [2021-11-07 01:25:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:36,422 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 630 transitions. [2021-11-07 01:25:36,423 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 01:25:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 630 transitions. [2021-11-07 01:25:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:25:36,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:36,425 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 01:25:36,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:36,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:36,649 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2033694732, now seen corresponding path program 1 times [2021-11-07 01:25:36,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:36,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914239047] [2021-11-07 01:25:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:36,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:36,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:36,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:36,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:25:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:37,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:25:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:37,148 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 01:25:37,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:37,285 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 01:25:37,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:37,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914239047] [2021-11-07 01:25:37,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914239047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:37,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:37,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:37,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970394170] [2021-11-07 01:25:37,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:37,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:37,290 INFO L87 Difference]: Start difference. First operand 363 states and 630 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 01:25:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:37,349 INFO L93 Difference]: Finished difference Result 723 states and 1257 transitions. [2021-11-07 01:25:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:37,350 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 01:25:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:37,353 INFO L225 Difference]: With dead ends: 723 [2021-11-07 01:25:37,353 INFO L226 Difference]: Without dead ends: 368 [2021-11-07 01:25:37,354 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 01:25:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-07 01:25:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 363. [2021-11-07 01:25:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.736842105263158) internal successors, (627), 362 states have internal predecessors, (627), 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 01:25:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 627 transitions. [2021-11-07 01:25:37,391 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 627 transitions. Word has length 45 [2021-11-07 01:25:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:37,391 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 627 transitions. [2021-11-07 01:25:37,392 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 01:25:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 627 transitions. [2021-11-07 01:25:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:25:37,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:37,393 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 01:25:37,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:25:37,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:37,607 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 99112535, now seen corresponding path program 1 times [2021-11-07 01:25:37,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:37,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72319228] [2021-11-07 01:25:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:37,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:37,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:37,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:25:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:25:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:38,174 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 01:25:38,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:38,297 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 01:25:38,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:38,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72319228] [2021-11-07 01:25:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72319228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:38,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:38,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:38,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432863] [2021-11-07 01:25:38,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:38,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:38,300 INFO L87 Difference]: Start difference. First operand 363 states and 627 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 01:25:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:38,509 INFO L93 Difference]: Finished difference Result 1360 states and 2374 transitions. [2021-11-07 01:25:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:38,509 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 01:25:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:38,516 INFO L225 Difference]: With dead ends: 1360 [2021-11-07 01:25:38,516 INFO L226 Difference]: Without dead ends: 1023 [2021-11-07 01:25:38,517 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 01:25:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-07 01:25:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 363. [2021-11-07 01:25:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.7285318559556786) internal successors, (624), 362 states have internal predecessors, (624), 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 01:25:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 624 transitions. [2021-11-07 01:25:38,556 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 624 transitions. Word has length 46 [2021-11-07 01:25:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:38,558 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 624 transitions. [2021-11-07 01:25:38,558 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 01:25:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 624 transitions. [2021-11-07 01:25:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:25:38,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:38,561 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 01:25:38,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:38,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:38,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1995610556, now seen corresponding path program 1 times [2021-11-07 01:25:38,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:38,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143244677] [2021-11-07 01:25:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:38,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:38,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:38,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:25:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:39,332 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 01:25:39,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:39,447 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 01:25:39,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:39,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143244677] [2021-11-07 01:25:39,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143244677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:39,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:39,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:39,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806012744] [2021-11-07 01:25:39,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:39,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:39,450 INFO L87 Difference]: Start difference. First operand 363 states and 624 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 01:25:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:39,528 INFO L93 Difference]: Finished difference Result 823 states and 1419 transitions. [2021-11-07 01:25:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:39,528 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 01:25:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:39,533 INFO L225 Difference]: With dead ends: 823 [2021-11-07 01:25:39,533 INFO L226 Difference]: Without dead ends: 700 [2021-11-07 01:25:39,534 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 01:25:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-07 01:25:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 577. [2021-11-07 01:25:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 575 states have (on average 1.7652173913043478) internal successors, (1015), 576 states have internal predecessors, (1015), 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 01:25:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1015 transitions. [2021-11-07 01:25:39,582 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1015 transitions. Word has length 48 [2021-11-07 01:25:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:39,582 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1015 transitions. [2021-11-07 01:25:39,582 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 01:25:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1015 transitions. [2021-11-07 01:25:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:25:39,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:39,584 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 01:25:39,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:39,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:39,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash -186561717, now seen corresponding path program 1 times [2021-11-07 01:25:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307539076] [2021-11-07 01:25:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:39,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:39,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:39,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:39,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:25:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:40,386 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 01:25:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:40,507 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 01:25:40,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307539076] [2021-11-07 01:25:40,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307539076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:40,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:40,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:40,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678330518] [2021-11-07 01:25:40,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:40,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:40,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:40,509 INFO L87 Difference]: Start difference. First operand 577 states and 1015 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 01:25:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:40,593 INFO L93 Difference]: Finished difference Result 1355 states and 2393 transitions. [2021-11-07 01:25:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:40,593 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 01:25:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:40,599 INFO L225 Difference]: With dead ends: 1355 [2021-11-07 01:25:40,599 INFO L226 Difference]: Without dead ends: 862 [2021-11-07 01:25:40,600 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 01:25:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-07 01:25:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 739. [2021-11-07 01:25:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 737 states have (on average 1.7761194029850746) internal successors, (1309), 738 states have internal predecessors, (1309), 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 01:25:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1309 transitions. [2021-11-07 01:25:40,662 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1309 transitions. Word has length 60 [2021-11-07 01:25:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:40,662 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1309 transitions. [2021-11-07 01:25:40,662 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 01:25:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1309 transitions. [2021-11-07 01:25:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:25:40,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:40,664 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 01:25:40,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:40,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:40,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash 634049484, now seen corresponding path program 1 times [2021-11-07 01:25:40,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:40,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616694931] [2021-11-07 01:25:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:40,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:40,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:40,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:25:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:41,457 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 01:25:41,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:41,595 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 01:25:41,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:41,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616694931] [2021-11-07 01:25:41,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616694931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:41,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:41,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:41,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084352593] [2021-11-07 01:25:41,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:41,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:41,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:41,597 INFO L87 Difference]: Start difference. First operand 739 states and 1309 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 01:25:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:41,705 INFO L93 Difference]: Finished difference Result 1873 states and 3340 transitions. [2021-11-07 01:25:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:41,706 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 01:25:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:41,716 INFO L225 Difference]: With dead ends: 1873 [2021-11-07 01:25:41,716 INFO L226 Difference]: Without dead ends: 1226 [2021-11-07 01:25:41,719 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 01:25:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-07 01:25:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1103. [2021-11-07 01:25:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1101 states have (on average 1.7920072661217075) internal successors, (1973), 1102 states have internal predecessors, (1973), 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 01:25:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1973 transitions. [2021-11-07 01:25:41,811 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1973 transitions. Word has length 61 [2021-11-07 01:25:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:41,811 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1973 transitions. [2021-11-07 01:25:41,811 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 01:25:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1973 transitions. [2021-11-07 01:25:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:25:41,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:41,814 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 01:25:41,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:42,029 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 556645853, now seen corresponding path program 1 times [2021-11-07 01:25:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:42,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976661957] [2021-11-07 01:25:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:42,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:42,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:42,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:25:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:42,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:42,687 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 01:25:42,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:42,832 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 01:25:42,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:42,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976661957] [2021-11-07 01:25:42,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976661957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:42,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:42,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:42,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240070900] [2021-11-07 01:25:42,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:42,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:42,834 INFO L87 Difference]: Start difference. First operand 1103 states and 1973 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 01:25:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:42,977 INFO L93 Difference]: Finished difference Result 2945 states and 5301 transitions. [2021-11-07 01:25:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:42,977 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 01:25:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:42,990 INFO L225 Difference]: With dead ends: 2945 [2021-11-07 01:25:42,990 INFO L226 Difference]: Without dead ends: 1942 [2021-11-07 01:25:42,991 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 01:25:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-11-07 01:25:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1819. [2021-11-07 01:25:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1817 states have (on average 1.8051733626857458) internal successors, (3280), 1818 states have internal predecessors, (3280), 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 01:25:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3280 transitions. [2021-11-07 01:25:43,127 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3280 transitions. Word has length 62 [2021-11-07 01:25:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:43,127 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 3280 transitions. [2021-11-07 01:25:43,127 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 01:25:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3280 transitions. [2021-11-07 01:25:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:25:43,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:43,131 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 01:25:43,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:43,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:43,345 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1384140893, now seen corresponding path program 1 times [2021-11-07 01:25:43,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:43,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731959848] [2021-11-07 01:25:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:43,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:43,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:43,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:43,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:25:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:44,011 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 01:25:44,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:44,155 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 01:25:44,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:44,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731959848] [2021-11-07 01:25:44,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731959848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:44,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:44,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:44,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53072068] [2021-11-07 01:25:44,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:44,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:44,157 INFO L87 Difference]: Start difference. First operand 1819 states and 3280 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 01:25:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:44,379 INFO L93 Difference]: Finished difference Result 4829 states and 8741 transitions. [2021-11-07 01:25:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:44,380 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 01:25:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:44,400 INFO L225 Difference]: With dead ends: 4829 [2021-11-07 01:25:44,401 INFO L226 Difference]: Without dead ends: 3144 [2021-11-07 01:25:44,405 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 01:25:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-11-07 01:25:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3021. [2021-11-07 01:25:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3019 states have (on average 1.8115269956939384) internal successors, (5469), 3020 states have internal predecessors, (5469), 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 01:25:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5469 transitions. [2021-11-07 01:25:44,643 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5469 transitions. Word has length 63 [2021-11-07 01:25:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:44,643 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 5469 transitions. [2021-11-07 01:25:44,643 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 01:25:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5469 transitions. [2021-11-07 01:25:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:25:44,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:44,647 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 01:25:44,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:44,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:44,861 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash 955138380, now seen corresponding path program 1 times [2021-11-07 01:25:44,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:44,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011057663] [2021-11-07 01:25:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:44,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:44,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:44,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:25:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:45,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:45,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:45,466 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 01:25:45,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:45,650 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 01:25:45,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:45,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011057663] [2021-11-07 01:25:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011057663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:45,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:45,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:45,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990938632] [2021-11-07 01:25:45,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:45,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:45,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:45,653 INFO L87 Difference]: Start difference. First operand 3021 states and 5469 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 01:25:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:45,963 INFO L93 Difference]: Finished difference Result 8151 states and 14791 transitions. [2021-11-07 01:25:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:45,963 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 01:25:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:45,998 INFO L225 Difference]: With dead ends: 8151 [2021-11-07 01:25:45,998 INFO L226 Difference]: Without dead ends: 5298 [2021-11-07 01:25:46,003 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 01:25:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-11-07 01:25:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 5175. [2021-11-07 01:25:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 5173 states have (on average 1.8136477865841871) internal successors, (9382), 5174 states have internal predecessors, (9382), 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 01:25:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 9382 transitions. [2021-11-07 01:25:46,396 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 9382 transitions. Word has length 64 [2021-11-07 01:25:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:46,397 INFO L470 AbstractCegarLoop]: Abstraction has 5175 states and 9382 transitions. [2021-11-07 01:25:46,397 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 01:25:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 9382 transitions. [2021-11-07 01:25:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:25:46,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:46,407 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 01:25:46,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:46,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:46,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 673652972, now seen corresponding path program 1 times [2021-11-07 01:25:46,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:46,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949967082] [2021-11-07 01:25:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:46,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:46,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:46,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:25:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:47,391 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 01:25:47,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:47,546 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 01:25:47,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:47,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949967082] [2021-11-07 01:25:47,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949967082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:47,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:47,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:47,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022443130] [2021-11-07 01:25:47,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:47,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:47,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:47,548 INFO L87 Difference]: Start difference. First operand 5175 states and 9382 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 01:25:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:48,149 INFO L93 Difference]: Finished difference Result 15071 states and 27372 transitions. [2021-11-07 01:25:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:48,150 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 01:25:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:48,202 INFO L225 Difference]: With dead ends: 15071 [2021-11-07 01:25:48,202 INFO L226 Difference]: Without dead ends: 10068 [2021-11-07 01:25:48,210 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 01:25:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10068 states. [2021-11-07 01:25:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10068 to 9945. [2021-11-07 01:25:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9943 states have (on average 1.8142411746957658) internal successors, (18039), 9944 states have internal predecessors, (18039), 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 01:25:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 18039 transitions. [2021-11-07 01:25:48,940 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 18039 transitions. Word has length 65 [2021-11-07 01:25:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:48,940 INFO L470 AbstractCegarLoop]: Abstraction has 9945 states and 18039 transitions. [2021-11-07 01:25:48,941 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 01:25:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 18039 transitions. [2021-11-07 01:25:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:25:48,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:48,948 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 01:25:48,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:49,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:49,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash 805664540, now seen corresponding path program 1 times [2021-11-07 01:25:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:49,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659367631] [2021-11-07 01:25:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:49,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:49,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:49,172 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:49,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:25:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:49,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:49,886 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 01:25:49,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:50,086 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 01:25:50,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:50,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659367631] [2021-11-07 01:25:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659367631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:50,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:50,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:50,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020901125] [2021-11-07 01:25:50,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:50,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:50,088 INFO L87 Difference]: Start difference. First operand 9945 states and 18039 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 01:25:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:53,086 INFO L93 Difference]: Finished difference Result 24466 states and 44396 transitions. [2021-11-07 01:25:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:53,086 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 01:25:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:53,136 INFO L225 Difference]: With dead ends: 24466 [2021-11-07 01:25:53,137 INFO L226 Difference]: Without dead ends: 14771 [2021-11-07 01:25:53,151 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 01:25:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14771 states. [2021-11-07 01:25:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14771 to 9912. [2021-11-07 01:25:53,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9912 states, 9910 states have (on average 1.806962663975782) internal successors, (17907), 9911 states have internal predecessors, (17907), 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 01:25:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9912 states to 9912 states and 17907 transitions. [2021-11-07 01:25:53,848 INFO L78 Accepts]: Start accepts. Automaton has 9912 states and 17907 transitions. Word has length 66 [2021-11-07 01:25:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:53,849 INFO L470 AbstractCegarLoop]: Abstraction has 9912 states and 17907 transitions. [2021-11-07 01:25:53,849 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 01:25:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9912 states and 17907 transitions. [2021-11-07 01:25:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:25:53,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:53,854 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 01:25:53,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:54,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -705105731, now seen corresponding path program 1 times [2021-11-07 01:25:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:54,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925400943] [2021-11-07 01:25:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:54,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:54,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:54,071 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:54,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:25:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:54,795 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 01:25:54,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:54,952 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 01:25:54,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:54,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925400943] [2021-11-07 01:25:54,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925400943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:54,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:54,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:54,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649731821] [2021-11-07 01:25:54,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:54,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:54,954 INFO L87 Difference]: Start difference. First operand 9912 states and 17907 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 01:25:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:55,923 INFO L93 Difference]: Finished difference Result 28986 states and 52430 transitions. [2021-11-07 01:25:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:55,924 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 01:25:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:55,971 INFO L225 Difference]: With dead ends: 28986 [2021-11-07 01:25:55,971 INFO L226 Difference]: Without dead ends: 19253 [2021-11-07 01:25:55,984 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 01:25:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-11-07 01:25:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 19130. [2021-11-07 01:25:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19130 states, 19128 states have (on average 1.8061480552070264) internal successors, (34548), 19129 states have internal predecessors, (34548), 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 01:25:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19130 states to 19130 states and 34548 transitions. [2021-11-07 01:25:56,935 INFO L78 Accepts]: Start accepts. Automaton has 19130 states and 34548 transitions. Word has length 66 [2021-11-07 01:25:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:56,936 INFO L470 AbstractCegarLoop]: Abstraction has 19130 states and 34548 transitions. [2021-11-07 01:25:56,936 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 01:25:56,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19130 states and 34548 transitions. [2021-11-07 01:25:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:25:56,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:56,942 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 01:25:56,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:57,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:57,154 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:57,154 INFO L85 PathProgramCache]: Analyzing trace with hash 379863146, now seen corresponding path program 1 times [2021-11-07 01:25:57,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:57,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582656320] [2021-11-07 01:25:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:57,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:57,155 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:57,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:25:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:57,893 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 01:25:57,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:58,036 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 01:25:58,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:58,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582656320] [2021-11-07 01:25:58,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582656320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:58,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:58,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:58,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487034343] [2021-11-07 01:25:58,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:58,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:58,038 INFO L87 Difference]: Start difference. First operand 19130 states and 34548 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 01:25:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:59,654 INFO L93 Difference]: Finished difference Result 56826 states and 102667 transitions. [2021-11-07 01:25:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:59,655 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 01:25:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:59,735 INFO L225 Difference]: With dead ends: 56826 [2021-11-07 01:25:59,735 INFO L226 Difference]: Without dead ends: 37879 [2021-11-07 01:25:59,757 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 01:25:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37879 states. [2021-11-07 01:26:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37879 to 37756. [2021-11-07 01:26:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37756 states, 37754 states have (on average 1.8033850717804736) internal successors, (68085), 37755 states have internal predecessors, (68085), 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 01:26:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37756 states to 37756 states and 68085 transitions. [2021-11-07 01:26:01,570 INFO L78 Accepts]: Start accepts. Automaton has 37756 states and 68085 transitions. Word has length 67 [2021-11-07 01:26:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:01,570 INFO L470 AbstractCegarLoop]: Abstraction has 37756 states and 68085 transitions. [2021-11-07 01:26:01,570 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 01:26:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 37756 states and 68085 transitions. [2021-11-07 01:26:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:26:01,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:01,579 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 01:26:01,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:01,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,794 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1114840042, now seen corresponding path program 1 times [2021-11-07 01:26:01,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:01,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68787366] [2021-11-07 01:26:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:01,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:01,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:01,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:26:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:02,564 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 01:26:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:02,755 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 01:26:02,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:02,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68787366] [2021-11-07 01:26:02,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68787366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:02,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:02,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:02,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500260153] [2021-11-07 01:26:02,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:02,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:02,757 INFO L87 Difference]: Start difference. First operand 37756 states and 68085 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 01:26:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:09,485 INFO L93 Difference]: Finished difference Result 146433 states and 263908 transitions. [2021-11-07 01:26:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:26:09,485 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 01:26:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:09,726 INFO L225 Difference]: With dead ends: 146433 [2021-11-07 01:26:09,727 INFO L226 Difference]: Without dead ends: 108926 [2021-11-07 01:26:09,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108926 states. [2021-11-07 01:26:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108926 to 37498. [2021-11-07 01:26:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37498 states, 37496 states have (on average 1.7882707488798806) internal successors, (67053), 37497 states have internal predecessors, (67053), 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 01:26:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37498 states to 37498 states and 67053 transitions. [2021-11-07 01:26:12,418 INFO L78 Accepts]: Start accepts. Automaton has 37498 states and 67053 transitions. Word has length 68 [2021-11-07 01:26:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:12,419 INFO L470 AbstractCegarLoop]: Abstraction has 37498 states and 67053 transitions. [2021-11-07 01:26:12,419 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 01:26:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 37498 states and 67053 transitions. [2021-11-07 01:26:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:26:12,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:12,425 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 01:26:12,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:12,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:12,644 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash 119243832, now seen corresponding path program 1 times [2021-11-07 01:26:12,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:12,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857905611] [2021-11-07 01:26:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:12,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:12,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:12,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:26:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:13,402 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 01:26:13,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:13,569 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 01:26:13,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:13,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857905611] [2021-11-07 01:26:13,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857905611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:13,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:13,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:13,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42485897] [2021-11-07 01:26:13,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:13,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:13,571 INFO L87 Difference]: Start difference. First operand 37498 states and 67053 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 01:26:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:15,377 INFO L93 Difference]: Finished difference Result 74864 states and 133887 transitions. [2021-11-07 01:26:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:15,378 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 01:26:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:15,434 INFO L225 Difference]: With dead ends: 74864 [2021-11-07 01:26:15,434 INFO L226 Difference]: Without dead ends: 37621 [2021-11-07 01:26:15,457 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 01:26:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37621 states. [2021-11-07 01:26:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37621 to 37498. [2021-11-07 01:26:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37498 states, 37496 states have (on average 1.784857051418818) internal successors, (66925), 37497 states have internal predecessors, (66925), 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 01:26:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37498 states to 37498 states and 66925 transitions. [2021-11-07 01:26:17,386 INFO L78 Accepts]: Start accepts. Automaton has 37498 states and 66925 transitions. Word has length 68 [2021-11-07 01:26:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:17,386 INFO L470 AbstractCegarLoop]: Abstraction has 37498 states and 66925 transitions. [2021-11-07 01:26:17,386 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 01:26:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37498 states and 66925 transitions. [2021-11-07 01:26:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:26:17,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:17,393 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 01:26:17,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:17,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:17,606 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash -840224597, now seen corresponding path program 1 times [2021-11-07 01:26:17,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:17,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374408296] [2021-11-07 01:26:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:17,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:17,608 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:17,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3707abd-18cc-4cec-87de-804dbf4bd99a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:26:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:18,409 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 01:26:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:18,580 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 01:26:18,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:18,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374408296] [2021-11-07 01:26:18,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374408296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:18,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:18,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:18,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338847942] [2021-11-07 01:26:18,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:18,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:18,582 INFO L87 Difference]: Start difference. First operand 37498 states and 66925 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 01:26:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:21,625 INFO L93 Difference]: Finished difference Result 104090 states and 185417 transitions. [2021-11-07 01:26:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:21,626 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 01:26:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:21,851 INFO L225 Difference]: With dead ends: 104090 [2021-11-07 01:26:21,851 INFO L226 Difference]: Without dead ends: 66807 [2021-11-07 01:26:21,884 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 01:26:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66807 states.