./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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 646f5b113c7a3ad2f4a2522272ad1b8889776081b2b5bc43fffe0e887ddc48f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:36,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:36,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:36,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:36,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:36,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:36,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:36,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:36,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:36,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:36,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:36,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:36,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:36,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:36,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:36,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:36,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:36,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:36,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:36,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:36,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:36,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:36,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:36,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:36,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:36,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:36,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:36,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:36,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:36,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:36,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:36,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:36,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:36,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:36,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:36,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:36,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:36,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:36,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:36,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:36,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:36,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:53:36,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:36,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:36,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:36,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:36,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:36,939 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:36,940 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:53:36,940 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:36,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:36,947 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:53:36,948 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:53:36,948 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:36,949 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:53:36,949 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:53:36,949 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:53:36,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:36,950 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:53:36,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:36,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:53:36,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:36,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:36,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:36,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:36,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:36,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:53:36,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:36,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:36,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:36,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:36,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:36,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:36,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:36,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:36,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:36,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:53:36,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:53:36,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:36,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:36,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:36,959 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 646f5b113c7a3ad2f4a2522272ad1b8889776081b2b5bc43fffe0e887ddc48f7 [2021-11-07 00:53:37,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:37,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:37,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:37,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:37,305 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:37,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c [2021-11-07 00:53:37,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/3fd0f6fdb/9ae353cce7ac460f94b61e67dfcf90fc/FLAGb9d7ef925 [2021-11-07 00:53:38,065 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:38,065 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c [2021-11-07 00:53:38,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/3fd0f6fdb/9ae353cce7ac460f94b61e67dfcf90fc/FLAGb9d7ef925 [2021-11-07 00:53:38,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/3fd0f6fdb/9ae353cce7ac460f94b61e67dfcf90fc [2021-11-07 00:53:38,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:38,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:38,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:38,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:38,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:38,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dce52e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38, skipping insertion in model container [2021-11-07 00:53:38,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:38,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:38,704 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c[4724,4737] [2021-11-07 00:53:39,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:39,181 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 00:53:39,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72f31f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:39, skipping insertion in model container [2021-11-07 00:53:39,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:39,182 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:53:39,185 INFO L168 Benchmark]: Toolchain (without parser) took 926.68 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 51.3 MB in the beginning and 89.2 MB in the end (delta: -37.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:39,186 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 88.1 MB. Free memory was 60.1 MB in the beginning and 60.0 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:53:39,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 921.53 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 51.0 MB in the beginning and 89.2 MB in the end (delta: -38.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:39,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 88.1 MB. Free memory was 60.1 MB in the beginning and 60.0 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 921.53 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 51.0 MB in the beginning and 89.2 MB in the end (delta: -38.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 265]: 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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 646f5b113c7a3ad2f4a2522272ad1b8889776081b2b5bc43fffe0e887ddc48f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:41,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:41,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:41,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:41,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:41,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:41,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:41,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:41,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:41,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:41,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:41,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:41,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:41,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:41,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:41,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:41,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:41,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:41,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:41,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:41,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:41,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:41,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:41,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:41,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:41,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:41,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:41,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:41,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:41,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:41,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:41,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:41,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:41,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:41,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:41,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:41,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:41,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:41,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:41,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:41,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:41,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:53:41,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:41,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:41,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:41,582 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:41,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:41,582 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:41,583 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:41,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:41,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:41,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:41,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:53:41,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:53:41,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:41,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:41,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:41,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:41,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:41,585 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:53:41,585 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:53:41,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:53:41,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:41,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:41,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:41,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:41,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:53:41,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:41,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:41,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:41,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:41,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:41,588 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:53:41,588 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:41,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:41,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:41,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:41,589 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 646f5b113c7a3ad2f4a2522272ad1b8889776081b2b5bc43fffe0e887ddc48f7 [2021-11-07 00:53:41,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:41,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:41,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:41,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:41,967 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:41,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product22.cil.c [2021-11-07 00:53:42,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/1f33a0441/17d81df6282249c69d1c6c85fcd46611/FLAG95e3a07f5 [2021-11-07 00:53:42,738 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:42,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c [2021-11-07 00:53:42,764 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/1f33a0441/17d81df6282249c69d1c6c85fcd46611/FLAG95e3a07f5 [2021-11-07 00:53:42,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/data/1f33a0441/17d81df6282249c69d1c6c85fcd46611 [2021-11-07 00:53:42,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:42,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:42,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:42,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:42,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:42,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:42" (1/1) ... [2021-11-07 00:53:42,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbaaa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:42, skipping insertion in model container [2021-11-07 00:53:42,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:42" (1/1) ... [2021-11-07 00:53:42,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:43,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:43,439 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c[4724,4737] [2021-11-07 00:53:43,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:43,889 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:53:43,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:43,926 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c[4724,4737] [2021-11-07 00:53:44,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:44,017 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:44,046 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_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/sv-benchmarks/c/product-lines/email_spec0_product22.cil.c[4724,4737] [2021-11-07 00:53:44,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:44,176 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:44,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44 WrapperNode [2021-11-07 00:53:44,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:44,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:44,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:44,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:44,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:44,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:44,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:44,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:44,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:44,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:44,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:44,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:44,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (1/1) ... [2021-11-07 00:53:44,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:44,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:44,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:44,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:44,627 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 00:53:44,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:53:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:44,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:53:49,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:53:49,011 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 00:53:49,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:49 BoogieIcfgContainer [2021-11-07 00:53:49,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:53:49,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:53:49,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:53:49,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:53:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:42" (1/3) ... [2021-11-07 00:53:49,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a047cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:49, skipping insertion in model container [2021-11-07 00:53:49,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:44" (2/3) ... [2021-11-07 00:53:49,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a047cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:49, skipping insertion in model container [2021-11-07 00:53:49,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:49" (3/3) ... [2021-11-07 00:53:49,021 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product22.cil.c [2021-11-07 00:53:49,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:53:49,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 00:53:49,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:53:49,080 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 00:53:49,080 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 00:53:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 475 states, 472 states have (on average 1.7394067796610169) internal successors, (821), 474 states have internal predecessors, (821), 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 00:53:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 00:53:49,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:49,119 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] [2021-11-07 00:53:49,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:49,125 INFO L85 PathProgramCache]: Analyzing trace with hash -969793478, now seen corresponding path program 1 times [2021-11-07 00:53:49,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:49,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160396655] [2021-11-07 00:53:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:49,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:49,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:49,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:49,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:53:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:53:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:49,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:50,079 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 00:53:50,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:50,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160396655] [2021-11-07 00:53:50,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160396655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:50,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:50,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:53:50,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512891834] [2021-11-07 00:53:50,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:53:50,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:53:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:53:50,110 INFO L87 Difference]: Start difference. First operand has 475 states, 472 states have (on average 1.7394067796610169) internal successors, (821), 474 states have internal predecessors, (821), 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 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 00:53:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:50,194 INFO L93 Difference]: Finished difference Result 704 states and 1194 transitions. [2021-11-07 00:53:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:53:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 58 [2021-11-07 00:53:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:50,213 INFO L225 Difference]: With dead ends: 704 [2021-11-07 00:53:50,213 INFO L226 Difference]: Without dead ends: 447 [2021-11-07 00:53:50,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 114 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 00:53:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-07 00:53:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2021-11-07 00:53:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 445 states have (on average 1.7370786516853933) internal successors, (773), 446 states have internal predecessors, (773), 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 00:53:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 773 transitions. [2021-11-07 00:53:50,287 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 773 transitions. Word has length 58 [2021-11-07 00:53:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:50,288 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 773 transitions. [2021-11-07 00:53:50,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 00:53:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 773 transitions. [2021-11-07 00:53:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:53:50,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:50,294 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] [2021-11-07 00:53:50,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:50,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:50,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:50,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1476618713, now seen corresponding path program 1 times [2021-11-07 00:53:50,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:50,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116347594] [2021-11-07 00:53:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:50,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:50,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:50,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:53:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:53:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:51,179 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 00:53:51,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:51,361 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 00:53:51,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:51,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116347594] [2021-11-07 00:53:51,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116347594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:51,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:51,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:51,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870321703] [2021-11-07 00:53:51,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:51,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:51,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:51,371 INFO L87 Difference]: Start difference. First operand 447 states and 773 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 00:53:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:51,491 INFO L93 Difference]: Finished difference Result 1311 states and 2271 transitions. [2021-11-07 00:53:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 59 [2021-11-07 00:53:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:51,500 INFO L225 Difference]: With dead ends: 1311 [2021-11-07 00:53:51,501 INFO L226 Difference]: Without dead ends: 879 [2021-11-07 00:53:51,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 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 00:53:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-11-07 00:53:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 446. [2021-11-07 00:53:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.7297297297297298) internal successors, (768), 445 states have internal predecessors, (768), 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 00:53:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 768 transitions. [2021-11-07 00:53:51,581 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 768 transitions. Word has length 59 [2021-11-07 00:53:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:51,582 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 768 transitions. [2021-11-07 00:53:51,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 00:53:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 768 transitions. [2021-11-07 00:53:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 00:53:51,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:51,595 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 00:53:51,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:51,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:51,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 368488973, now seen corresponding path program 1 times [2021-11-07 00:53:51,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:51,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142040723] [2021-11-07 00:53:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:51,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:51,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:51,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:51,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:53:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:52,435 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 00:53:52,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:52,618 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 00:53:52,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:52,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142040723] [2021-11-07 00:53:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142040723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:52,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:52,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:52,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610111192] [2021-11-07 00:53:52,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:52,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:52,621 INFO L87 Difference]: Start difference. First operand 446 states and 768 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 00:53:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:52,866 INFO L93 Difference]: Finished difference Result 1701 states and 2934 transitions. [2021-11-07 00:53:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:53:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 61 [2021-11-07 00:53:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:52,877 INFO L225 Difference]: With dead ends: 1701 [2021-11-07 00:53:52,898 INFO L226 Difference]: Without dead ends: 1273 [2021-11-07 00:53:52,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 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 00:53:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-11-07 00:53:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 445. [2021-11-07 00:53:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.724604966139955) internal successors, (764), 444 states have internal predecessors, (764), 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 00:53:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 764 transitions. [2021-11-07 00:53:52,936 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 764 transitions. Word has length 61 [2021-11-07 00:53:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:52,937 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 764 transitions. [2021-11-07 00:53:52,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 00:53:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 764 transitions. [2021-11-07 00:53:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 00:53:52,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:52,940 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 00:53:52,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:53,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:53,155 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1324435936, now seen corresponding path program 1 times [2021-11-07 00:53:53,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:53,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850917848] [2021-11-07 00:53:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:53,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:53,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:53,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:53:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:53,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:53:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:53,729 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 00:53:53,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:53,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:53,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850917848] [2021-11-07 00:53:53,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850917848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:53,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:53,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:53,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759905040] [2021-11-07 00:53:53,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:53,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:53,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:53,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:53,886 INFO L87 Difference]: Start difference. First operand 445 states and 764 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 00:53:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:53,977 INFO L93 Difference]: Finished difference Result 887 states and 1525 transitions. [2021-11-07 00:53:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 62 [2021-11-07 00:53:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:53,981 INFO L225 Difference]: With dead ends: 887 [2021-11-07 00:53:53,981 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 00:53:53,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 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 00:53:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 00:53:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 445. [2021-11-07 00:53:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.7178329571106095) internal successors, (761), 444 states have internal predecessors, (761), 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 00:53:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 761 transitions. [2021-11-07 00:53:54,026 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 761 transitions. Word has length 62 [2021-11-07 00:53:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:54,028 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 761 transitions. [2021-11-07 00:53:54,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 00:53:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 761 transitions. [2021-11-07 00:53:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 00:53:54,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:54,032 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 00:53:54,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:54,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:54,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1485679349, now seen corresponding path program 1 times [2021-11-07 00:53:54,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:54,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778102673] [2021-11-07 00:53:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:54,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:54,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:54,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:53:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:54,848 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 00:53:54,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:55,021 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 00:53:55,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:55,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778102673] [2021-11-07 00:53:55,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778102673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:55,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:55,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:55,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111732286] [2021-11-07 00:53:55,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:55,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:55,023 INFO L87 Difference]: Start difference. First operand 445 states and 761 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 00:53:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:55,255 INFO L93 Difference]: Finished difference Result 1688 states and 2910 transitions. [2021-11-07 00:53:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:53:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 00:53:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:55,265 INFO L225 Difference]: With dead ends: 1688 [2021-11-07 00:53:55,265 INFO L226 Difference]: Without dead ends: 1269 [2021-11-07 00:53:55,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 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 00:53:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-11-07 00:53:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 445. [2021-11-07 00:53:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.7110609480812642) internal successors, (758), 444 states have internal predecessors, (758), 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 00:53:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 758 transitions. [2021-11-07 00:53:55,313 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 758 transitions. Word has length 63 [2021-11-07 00:53:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:55,313 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 758 transitions. [2021-11-07 00:53:55,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 00:53:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 758 transitions. [2021-11-07 00:53:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:53:55,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:55,315 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 00:53:55,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:55,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:55,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1736442320, now seen corresponding path program 1 times [2021-11-07 00:53:55,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:55,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500023013] [2021-11-07 00:53:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:55,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:55,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:55,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:55,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:53:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:56,176 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 00:53:56,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:56,341 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 00:53:56,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:56,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500023013] [2021-11-07 00:53:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500023013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:56,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:56,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602283097] [2021-11-07 00:53:56,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:56,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:56,343 INFO L87 Difference]: Start difference. First operand 445 states and 758 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 00:53:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:56,426 INFO L93 Difference]: Finished difference Result 1065 states and 1814 transitions. [2021-11-07 00:53:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:56,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 65 [2021-11-07 00:53:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:56,432 INFO L225 Difference]: With dead ends: 1065 [2021-11-07 00:53:56,432 INFO L226 Difference]: Without dead ends: 864 [2021-11-07 00:53:56,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 00:53:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-07 00:53:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 663. [2021-11-07 00:53:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 661 states have (on average 1.7488653555219364) internal successors, (1156), 662 states have internal predecessors, (1156), 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 00:53:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1156 transitions. [2021-11-07 00:53:56,489 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1156 transitions. Word has length 65 [2021-11-07 00:53:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1156 transitions. [2021-11-07 00:53:56,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 00:53:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1156 transitions. [2021-11-07 00:53:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 00:53:56,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:56,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:56,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:56,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:56,712 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash 136001889, now seen corresponding path program 1 times [2021-11-07 00:53:56,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:56,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640762755] [2021-11-07 00:53:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:56,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:56,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:56,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:56,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:53:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:57,428 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 00:53:57,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:57,616 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 00:53:57,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:57,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640762755] [2021-11-07 00:53:57,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640762755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:57,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:57,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:57,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129518612] [2021-11-07 00:53:57,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:57,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:57,619 INFO L87 Difference]: Start difference. First operand 663 states and 1156 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 00:53:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:57,723 INFO L93 Difference]: Finished difference Result 1609 states and 2809 transitions. [2021-11-07 00:53:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:57,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-07 00:53:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:57,731 INFO L225 Difference]: With dead ends: 1609 [2021-11-07 00:53:57,731 INFO L226 Difference]: Without dead ends: 1030 [2021-11-07 00:53:57,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 00:53:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-11-07 00:53:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 829. [2021-11-07 00:53:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.761789600967352) internal successors, (1457), 828 states have internal predecessors, (1457), 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 00:53:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1457 transitions. [2021-11-07 00:53:57,801 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1457 transitions. Word has length 77 [2021-11-07 00:53:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:57,801 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1457 transitions. [2021-11-07 00:53:57,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 00:53:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1457 transitions. [2021-11-07 00:53:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 00:53:57,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:57,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:58,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:58,026 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash 871736064, now seen corresponding path program 1 times [2021-11-07 00:53:58,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:58,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173794238] [2021-11-07 00:53:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:58,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:58,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:58,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:53:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:58,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:58,896 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 00:53:58,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:58,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173794238] [2021-11-07 00:53:58,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173794238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:58,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:58,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:58,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686242329] [2021-11-07 00:53:58,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:58,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:58,899 INFO L87 Difference]: Start difference. First operand 829 states and 1457 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 00:53:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:59,033 INFO L93 Difference]: Finished difference Result 2139 states and 3777 transitions. [2021-11-07 00:53:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-11-07 00:53:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:59,042 INFO L225 Difference]: With dead ends: 2139 [2021-11-07 00:53:59,043 INFO L226 Difference]: Without dead ends: 1402 [2021-11-07 00:53:59,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 00:53:59,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-07 00:53:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1201. [2021-11-07 00:53:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1199 states have (on average 1.780650542118432) internal successors, (2135), 1200 states have internal predecessors, (2135), 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 00:53:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 2135 transitions. [2021-11-07 00:53:59,156 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 2135 transitions. Word has length 78 [2021-11-07 00:53:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:59,157 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 2135 transitions. [2021-11-07 00:53:59,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 00:53:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 2135 transitions. [2021-11-07 00:53:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 00:53:59,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:59,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:59,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:59,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:59,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1892418289, now seen corresponding path program 1 times [2021-11-07 00:53:59,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:59,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669110243] [2021-11-07 00:53:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:59,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:59,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:59,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:59,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:53:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:59,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:00,093 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 00:54:00,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:00,287 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 00:54:00,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:00,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669110243] [2021-11-07 00:54:00,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669110243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:00,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:00,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:00,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732793080] [2021-11-07 00:54:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:00,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:00,290 INFO L87 Difference]: Start difference. First operand 1201 states and 2135 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 00:54:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:00,467 INFO L93 Difference]: Finished difference Result 3235 states and 5780 transitions. [2021-11-07 00:54:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:00,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-07 00:54:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:00,481 INFO L225 Difference]: With dead ends: 3235 [2021-11-07 00:54:00,481 INFO L226 Difference]: Without dead ends: 2134 [2021-11-07 00:54:00,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 00:54:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-11-07 00:54:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1933. [2021-11-07 00:54:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1931 states have (on average 1.7969963749352666) internal successors, (3470), 1932 states have internal predecessors, (3470), 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 00:54:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 3470 transitions. [2021-11-07 00:54:00,675 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 3470 transitions. Word has length 79 [2021-11-07 00:54:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:00,676 INFO L470 AbstractCegarLoop]: Abstraction has 1933 states and 3470 transitions. [2021-11-07 00:54:00,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 00:54:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 3470 transitions. [2021-11-07 00:54:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 00:54:00,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:00,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:00,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:00,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:00,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1745402511, now seen corresponding path program 1 times [2021-11-07 00:54:00,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:00,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199920024] [2021-11-07 00:54:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:00,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:00,900 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:00,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:54:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:01,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:01,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:01,815 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 00:54:01,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:01,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199920024] [2021-11-07 00:54:01,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199920024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:01,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:01,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:01,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898509494] [2021-11-07 00:54:01,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:01,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:01,817 INFO L87 Difference]: Start difference. First operand 1933 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 00:54:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:02,056 INFO L93 Difference]: Finished difference Result 5167 states and 9304 transitions. [2021-11-07 00:54:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-07 00:54:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:02,079 INFO L225 Difference]: With dead ends: 5167 [2021-11-07 00:54:02,080 INFO L226 Difference]: Without dead ends: 3368 [2021-11-07 00:54:02,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 00:54:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-11-07 00:54:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3167. [2021-11-07 00:54:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3165 states have (on average 1.8056872037914693) internal successors, (5715), 3166 states have internal predecessors, (5715), 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 00:54:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 5715 transitions. [2021-11-07 00:54:02,338 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 5715 transitions. Word has length 80 [2021-11-07 00:54:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:02,339 INFO L470 AbstractCegarLoop]: Abstraction has 3167 states and 5715 transitions. [2021-11-07 00:54:02,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 00:54:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 5715 transitions. [2021-11-07 00:54:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 00:54:02,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:02,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:02,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:02,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:02,564 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:02,565 INFO L85 PathProgramCache]: Analyzing trace with hash -781523584, now seen corresponding path program 1 times [2021-11-07 00:54:02,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:02,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693125815] [2021-11-07 00:54:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:02,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:02,566 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:02,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:54:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:03,287 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 00:54:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:03,471 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 00:54:03,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:03,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693125815] [2021-11-07 00:54:03,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693125815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:03,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:03,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:03,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513712900] [2021-11-07 00:54:03,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:03,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:03,473 INFO L87 Difference]: Start difference. First operand 3167 states and 5715 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 00:54:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:03,855 INFO L93 Difference]: Finished difference Result 8585 states and 15522 transitions. [2021-11-07 00:54:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:03,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2021-11-07 00:54:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:03,892 INFO L225 Difference]: With dead ends: 8585 [2021-11-07 00:54:03,892 INFO L226 Difference]: Without dead ends: 5586 [2021-11-07 00:54:03,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 00:54:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-11-07 00:54:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 5385. [2021-11-07 00:54:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5385 states, 5383 states have (on average 1.8093999628459967) internal successors, (9740), 5384 states have internal predecessors, (9740), 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 00:54:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5385 states to 5385 states and 9740 transitions. [2021-11-07 00:54:04,337 INFO L78 Accepts]: Start accepts. Automaton has 5385 states and 9740 transitions. Word has length 81 [2021-11-07 00:54:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:04,338 INFO L470 AbstractCegarLoop]: Abstraction has 5385 states and 9740 transitions. [2021-11-07 00:54:04,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 00:54:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5385 states and 9740 transitions. [2021-11-07 00:54:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 00:54:04,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:04,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:04,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:04,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:04,563 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 676936160, now seen corresponding path program 1 times [2021-11-07 00:54:04,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:04,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808590386] [2021-11-07 00:54:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:04,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:04,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:04,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:04,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:54:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:05,403 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 00:54:05,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:05,588 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 00:54:05,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:05,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808590386] [2021-11-07 00:54:05,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808590386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:05,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:05,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:05,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146925806] [2021-11-07 00:54:05,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:05,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:05,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:05,591 INFO L87 Difference]: Start difference. First operand 5385 states and 9740 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 00:54:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:06,257 INFO L93 Difference]: Finished difference Result 15565 states and 28208 transitions. [2021-11-07 00:54:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2021-11-07 00:54:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:06,306 INFO L225 Difference]: With dead ends: 15565 [2021-11-07 00:54:06,306 INFO L226 Difference]: Without dead ends: 10356 [2021-11-07 00:54:06,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 00:54:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-11-07 00:54:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 10155. [2021-11-07 00:54:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10153 states have (on average 1.8119767556387274) internal successors, (18397), 10154 states have internal predecessors, (18397), 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 00:54:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 18397 transitions. [2021-11-07 00:54:07,043 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 18397 transitions. Word has length 82 [2021-11-07 00:54:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 10155 states and 18397 transitions. [2021-11-07 00:54:07,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 00:54:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 18397 transitions. [2021-11-07 00:54:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 00:54:07,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:07,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:07,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:07,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:07,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1936225072, now seen corresponding path program 1 times [2021-11-07 00:54:07,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:07,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263906722] [2021-11-07 00:54:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:07,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:07,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:07,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:54:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:08,095 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 00:54:08,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:08,305 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 00:54:08,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:08,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263906722] [2021-11-07 00:54:08,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263906722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:08,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:08,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:54:08,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617033623] [2021-11-07 00:54:08,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:54:08,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:54:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:54:08,308 INFO L87 Difference]: Start difference. First operand 10155 states and 18397 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 00:54:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:11,346 INFO L93 Difference]: Finished difference Result 25024 states and 45344 transitions. [2021-11-07 00:54:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:54:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 83 [2021-11-07 00:54:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:11,389 INFO L225 Difference]: With dead ends: 25024 [2021-11-07 00:54:11,389 INFO L226 Difference]: Without dead ends: 15123 [2021-11-07 00:54:11,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 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 00:54:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15123 states. [2021-11-07 00:54:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15123 to 10122. [2021-11-07 00:54:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10122 states, 10120 states have (on average 1.8048418972332017) internal successors, (18265), 10121 states have internal predecessors, (18265), 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 00:54:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10122 states to 10122 states and 18265 transitions. [2021-11-07 00:54:12,201 INFO L78 Accepts]: Start accepts. Automaton has 10122 states and 18265 transitions. Word has length 83 [2021-11-07 00:54:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 10122 states and 18265 transitions. [2021-11-07 00:54:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 00:54:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10122 states and 18265 transitions. [2021-11-07 00:54:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 00:54:12,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:12,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:12,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:12,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:12,429 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash 664331823, now seen corresponding path program 1 times [2021-11-07 00:54:12,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:12,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854062569] [2021-11-07 00:54:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:12,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:12,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:12,432 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:12,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:54:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:13,250 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 00:54:13,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:13,451 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 00:54:13,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:13,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854062569] [2021-11-07 00:54:13,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854062569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:13,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:13,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:13,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520177608] [2021-11-07 00:54:13,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:13,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:13,453 INFO L87 Difference]: Start difference. First operand 10122 states and 18265 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 00:54:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:14,321 INFO L93 Difference]: Finished difference Result 29608 states and 53490 transitions. [2021-11-07 00:54:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-07 00:54:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:14,464 INFO L225 Difference]: With dead ends: 29608 [2021-11-07 00:54:14,464 INFO L226 Difference]: Without dead ends: 19669 [2021-11-07 00:54:14,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 00:54:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19669 states. [2021-11-07 00:54:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19669 to 19468. [2021-11-07 00:54:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19468 states, 19466 states have (on average 1.804685091955204) internal successors, (35130), 19467 states have internal predecessors, (35130), 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 00:54:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19468 states to 19468 states and 35130 transitions. [2021-11-07 00:54:15,444 INFO L78 Accepts]: Start accepts. Automaton has 19468 states and 35130 transitions. Word has length 83 [2021-11-07 00:54:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:15,444 INFO L470 AbstractCegarLoop]: Abstraction has 19468 states and 35130 transitions. [2021-11-07 00:54:15,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 00:54:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 19468 states and 35130 transitions. [2021-11-07 00:54:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 00:54:15,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:15,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:15,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 00:54:15,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:15,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1853175569, now seen corresponding path program 1 times [2021-11-07 00:54:15,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:15,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653639918] [2021-11-07 00:54:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:15,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:15,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:15,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:54:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:16,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:16,521 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 00:54:16,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:16,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:16,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653639918] [2021-11-07 00:54:16,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653639918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:16,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:16,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:16,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719128456] [2021-11-07 00:54:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:16,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:16,703 INFO L87 Difference]: Start difference. First operand 19468 states and 35130 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 00:54:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:18,425 INFO L93 Difference]: Finished difference Result 57832 states and 104399 transitions. [2021-11-07 00:54:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-07 00:54:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:18,517 INFO L225 Difference]: With dead ends: 57832 [2021-11-07 00:54:18,518 INFO L226 Difference]: Without dead ends: 38551 [2021-11-07 00:54:18,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 00:54:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38551 states. [2021-11-07 00:54:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38551 to 38350. [2021-11-07 00:54:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38350 states, 38348 states have (on average 1.8023104203609055) internal successors, (69115), 38349 states have internal predecessors, (69115), 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 00:54:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38350 states to 38350 states and 69115 transitions. [2021-11-07 00:54:20,340 INFO L78 Accepts]: Start accepts. Automaton has 38350 states and 69115 transitions. Word has length 84 [2021-11-07 00:54:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:20,341 INFO L470 AbstractCegarLoop]: Abstraction has 38350 states and 69115 transitions. [2021-11-07 00:54:20,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 00:54:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 38350 states and 69115 transitions. [2021-11-07 00:54:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 00:54:20,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:20,361 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:20,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:20,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:20,577 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1607234326, now seen corresponding path program 1 times [2021-11-07 00:54:20,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:20,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018787117] [2021-11-07 00:54:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:20,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:20,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:20,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:54:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:21,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:21,488 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 00:54:21,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:21,927 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 00:54:21,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:21,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018787117] [2021-11-07 00:54:21,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018787117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:21,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:21,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:54:21,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307567282] [2021-11-07 00:54:21,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:54:21,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:54:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:54:21,929 INFO L87 Difference]: Start difference. First operand 38350 states and 69115 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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 00:54:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:28,675 INFO L93 Difference]: Finished difference Result 148797 states and 268007 transitions. [2021-11-07 00:54:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:54:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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 85 [2021-11-07 00:54:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:28,870 INFO L225 Difference]: With dead ends: 148797 [2021-11-07 00:54:28,870 INFO L226 Difference]: Without dead ends: 110700 [2021-11-07 00:54:28,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 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 00:54:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110700 states. [2021-11-07 00:54:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110700 to 38092. [2021-11-07 00:54:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38092 states, 38090 states have (on average 1.7874245208716197) internal successors, (68083), 38091 states have internal predecessors, (68083), 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 00:54:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38092 states to 38092 states and 68083 transitions. [2021-11-07 00:54:31,972 INFO L78 Accepts]: Start accepts. Automaton has 38092 states and 68083 transitions. Word has length 85 [2021-11-07 00:54:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:31,973 INFO L470 AbstractCegarLoop]: Abstraction has 38092 states and 68083 transitions. [2021-11-07 00:54:31,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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 00:54:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 38092 states and 68083 transitions. [2021-11-07 00:54:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 00:54:31,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:31,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:32,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 00:54:32,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:32,207 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:32,208 INFO L85 PathProgramCache]: Analyzing trace with hash -323888332, now seen corresponding path program 1 times [2021-11-07 00:54:32,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:32,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952351117] [2021-11-07 00:54:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:32,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:32,209 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:32,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:54:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:33,197 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 00:54:33,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:33,372 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 00:54:33,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:33,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952351117] [2021-11-07 00:54:33,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952351117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:33,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:33,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:54:33,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346929445] [2021-11-07 00:54:33,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:54:33,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:54:33,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:54:33,375 INFO L87 Difference]: Start difference. First operand 38092 states and 68083 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 00:54:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:35,168 INFO L93 Difference]: Finished difference Result 76126 states and 136067 transitions. [2021-11-07 00:54:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 85 [2021-11-07 00:54:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:35,226 INFO L225 Difference]: With dead ends: 76126 [2021-11-07 00:54:35,226 INFO L226 Difference]: Without dead ends: 38293 [2021-11-07 00:54:35,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 166 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 00:54:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2021-11-07 00:54:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 38092. [2021-11-07 00:54:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38092 states, 38090 states have (on average 1.784064058808086) internal successors, (67955), 38091 states have internal predecessors, (67955), 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 00:54:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38092 states to 38092 states and 67955 transitions. [2021-11-07 00:54:37,398 INFO L78 Accepts]: Start accepts. Automaton has 38092 states and 67955 transitions. Word has length 85 [2021-11-07 00:54:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:37,398 INFO L470 AbstractCegarLoop]: Abstraction has 38092 states and 67955 transitions. [2021-11-07 00:54:37,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 00:54:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38092 states and 67955 transitions. [2021-11-07 00:54:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 00:54:37,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:37,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:37,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:37,610 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash -199419487, now seen corresponding path program 1 times [2021-11-07 00:54:37,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:37,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731442088] [2021-11-07 00:54:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:37,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:37,612 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:37,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:54:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:38,566 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 00:54:38,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:38,754 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 00:54:38,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:38,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731442088] [2021-11-07 00:54:38,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731442088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:38,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:38,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:38,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907103688] [2021-11-07 00:54:38,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:38,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:38,756 INFO L87 Difference]: Start difference. First operand 38092 states and 67955 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 00:54:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:42,069 INFO L93 Difference]: Finished difference Result 105864 states and 188493 transitions. [2021-11-07 00:54:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 00:54:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:42,169 INFO L225 Difference]: With dead ends: 105864 [2021-11-07 00:54:42,169 INFO L226 Difference]: Without dead ends: 67991 [2021-11-07 00:54:42,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 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 00:54:42,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67991 states. [2021-11-07 00:54:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67991 to 67790. [2021-11-07 00:54:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67790 states, 67788 states have (on average 1.7747683955862394) internal successors, (120308), 67789 states have internal predecessors, (120308), 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 00:54:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67790 states to 67790 states and 120308 transitions. [2021-11-07 00:54:46,142 INFO L78 Accepts]: Start accepts. Automaton has 67790 states and 120308 transitions. Word has length 85 [2021-11-07 00:54:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:46,143 INFO L470 AbstractCegarLoop]: Abstraction has 67790 states and 120308 transitions. [2021-11-07 00:54:46,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 00:54:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 67790 states and 120308 transitions. [2021-11-07 00:54:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:54:46,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:46,160 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:46,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 00:54:46,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:46,361 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:46,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1449006726, now seen corresponding path program 1 times [2021-11-07 00:54:46,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:46,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664928553] [2021-11-07 00:54:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:46,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:46,363 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:46,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05dabc16-2fe2-4c69-88a5-065ae09d4ff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:54:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates...