./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product40.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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product40.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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 3d6b4da8bd47478af9a0348a2f21d8475ccd8463dda8c629c98551dc6b564226 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:57,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:57,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:58,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:58,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:58,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:58,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:58,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:58,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:58,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:58,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:58,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:58,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:58,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:58,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:58,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:58,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:58,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:58,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:58,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:58,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:58,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:58,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:58,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:58,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:58,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:58,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:58,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:58,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:58,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:58,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:58,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:58,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:58,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:58,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:58,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:58,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:58,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:58,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:58,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:58,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:58,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:34:58,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:58,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:58,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:58,148 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:58,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:58,149 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:58,149 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:34:58,149 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:58,156 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:58,156 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:34:58,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:34:58,158 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:58,158 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:34:58,158 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:34:58,159 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:34:58,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:58,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:58,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:34:58,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:58,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:58,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:58,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:58,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:58,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:58,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:58,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:58,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:58,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:58,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:58,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:58,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:58,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:58,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:58,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:58,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:34:58,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:34:58,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:58,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:58,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:58,167 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d6b4da8bd47478af9a0348a2f21d8475ccd8463dda8c629c98551dc6b564226 [2021-11-07 01:34:58,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:58,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:58,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:58,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:58,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:58,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product40.cil.c [2021-11-07 01:34:58,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/7a13cc1fb/1e4c3e5954044b948525bdd9679382da/FLAG883a93fb2 [2021-11-07 01:34:59,100 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:59,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/sv-benchmarks/c/product-lines/email_spec11_product40.cil.c [2021-11-07 01:34:59,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/7a13cc1fb/1e4c3e5954044b948525bdd9679382da/FLAG883a93fb2 [2021-11-07 01:34:59,325 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/7a13cc1fb/1e4c3e5954044b948525bdd9679382da [2021-11-07 01:34:59,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:59,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:59,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:59,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:59,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:59,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:59" (1/1) ... [2021-11-07 01:34:59,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65780a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:59, skipping insertion in model container [2021-11-07 01:34:59,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:59" (1/1) ... [2021-11-07 01:34:59,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:59,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:59,714 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/sv-benchmarks/c/product-lines/email_spec11_product40.cil.c[8480,8493] [2021-11-07 01:35:00,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:00,106 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:35:00,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32a3157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:00, skipping insertion in model container [2021-11-07 01:35:00,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:00,107 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:35:00,110 INFO L168 Benchmark]: Toolchain (without parser) took 779.06 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 48.7 MB in the beginning and 73.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:00,111 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory is still 67.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:35:00,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 771.45 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 48.5 MB in the beginning and 73.3 MB in the end (delta: -24.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:00,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory is still 67.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 771.45 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 48.5 MB in the beginning and 73.3 MB in the end (delta: -24.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product40.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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 3d6b4da8bd47478af9a0348a2f21d8475ccd8463dda8c629c98551dc6b564226 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:02,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:02,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:02,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:02,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:02,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:02,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:02,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:02,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:02,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:02,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:02,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:02,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:02,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:02,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:02,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:02,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:02,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:02,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:02,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:02,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:02,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:02,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:02,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:02,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:02,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:02,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:02,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:02,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:02,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:02,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:02,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:02,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:02,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:02,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:02,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:02,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:02,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:02,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:02,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:02,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:02,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:35:02,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:02,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:02,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:02,482 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:02,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:02,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:02,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:02,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:02,484 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:02,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:02,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:35:02,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:35:02,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:02,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:35:02,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:02,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:35:02,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:02,488 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:35:02,488 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:35:02,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:35:02,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:35:02,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:02,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:35:02,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:02,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:35:02,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:02,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:02,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:02,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:02,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:35:02,491 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:35:02,491 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:02,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:35:02,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:02,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:02,492 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d6b4da8bd47478af9a0348a2f21d8475ccd8463dda8c629c98551dc6b564226 [2021-11-07 01:35:02,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:02,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:02,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:02,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:02,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:02,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product40.cil.c [2021-11-07 01:35:02,962 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/201bcd1d5/8046af2dfe184079b1190433e1171898/FLAGfc7d68025 [2021-11-07 01:35:03,652 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:03,653 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/sv-benchmarks/c/product-lines/email_spec11_product40.cil.c [2021-11-07 01:35:03,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/201bcd1d5/8046af2dfe184079b1190433e1171898/FLAGfc7d68025 [2021-11-07 01:35:03,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/data/201bcd1d5/8046af2dfe184079b1190433e1171898 [2021-11-07 01:35:03,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:03,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:03,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:03,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:03,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:03,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:03" (1/1) ... [2021-11-07 01:35:03,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e86706c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:03, skipping insertion in model container [2021-11-07 01:35:03,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:03" (1/1) ... [2021-11-07 01:35:03,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:04,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:04,350 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/sv-benchmarks/c/product-lines/email_spec11_product40.cil.c[8480,8493] [2021-11-07 01:35:04,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:04,789 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:35:04,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:04,836 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/sv-benchmarks/c/product-lines/email_spec11_product40.cil.c[8480,8493] [2021-11-07 01:35:04,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:04,975 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:35:05,014 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_c6b04b3c-2487-4db0-a08a-0538e581bd9c/sv-benchmarks/c/product-lines/email_spec11_product40.cil.c[8480,8493] [2021-11-07 01:35:05,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:05,109 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:35:05,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05 WrapperNode [2021-11-07 01:35:05,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:05,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:05,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:35:05,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:35:05,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:05,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:35:05,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:35:05,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:35:05,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:35:05,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:35:05,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:35:05,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:35:05,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (1/1) ... [2021-11-07 01:35:05,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:05,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:35:05,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:35:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:35:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:35:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:35:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:35:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:35:10,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:35:10,441 INFO L299 CfgBuilder]: Removed 497 assume(true) statements. [2021-11-07 01:35:10,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:35:10 BoogieIcfgContainer [2021-11-07 01:35:10,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:35:10,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:35:10,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:35:10,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:35:10,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:35:03" (1/3) ... [2021-11-07 01:35:10,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2134a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:35:10, skipping insertion in model container [2021-11-07 01:35:10,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05" (2/3) ... [2021-11-07 01:35:10,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2134a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:35:10, skipping insertion in model container [2021-11-07 01:35:10,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:35:10" (3/3) ... [2021-11-07 01:35:10,454 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product40.cil.c [2021-11-07 01:35:10,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:35:10,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:35:10,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:35:10,545 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:35:10,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:35:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 672 states, 665 states have (on average 1.7338345864661655) internal successors, (1153), 671 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:35:10,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:10,621 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:10,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash 583028158, now seen corresponding path program 1 times [2021-11-07 01:35:10,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:10,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851578930] [2021-11-07 01:35:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:10,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:10,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:10,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:35:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:35:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:11,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:11,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:11,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851578930] [2021-11-07 01:35:11,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851578930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:11,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:11,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:35:11,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284120437] [2021-11-07 01:35:11,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:35:11,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:35:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:35:11,394 INFO L87 Difference]: Start difference. First operand has 672 states, 665 states have (on average 1.7338345864661655) internal successors, (1153), 671 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:11,479 INFO L93 Difference]: Finished difference Result 1055 states and 1776 transitions. [2021-11-07 01:35:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:35:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:35:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:11,506 INFO L225 Difference]: With dead ends: 1055 [2021-11-07 01:35:11,506 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:35:11,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:35:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:35:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-07 01:35:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 608 states have (on average 1.7269736842105263) internal successors, (1050), 613 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1050 transitions. [2021-11-07 01:35:11,614 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1050 transitions. Word has length 41 [2021-11-07 01:35:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:11,615 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1050 transitions. [2021-11-07 01:35:11,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1050 transitions. [2021-11-07 01:35:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:35:11,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:11,620 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:11,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:11,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:11,851 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -979691085, now seen corresponding path program 1 times [2021-11-07 01:35:11,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:11,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397571587] [2021-11-07 01:35:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:11,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:11,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:11,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:35:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:35:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:12,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:12,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:12,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397571587] [2021-11-07 01:35:12,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397571587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:12,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:12,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:35:12,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017584655] [2021-11-07 01:35:12,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:12,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:12,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:12,488 INFO L87 Difference]: Start difference. First operand 614 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:12,632 INFO L93 Difference]: Finished difference Result 1812 states and 3102 transitions. [2021-11-07 01:35:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 01:35:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:12,641 INFO L225 Difference]: With dead ends: 1812 [2021-11-07 01:35:12,642 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 01:35:12,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 01:35:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 613. [2021-11-07 01:35:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 607 states have (on average 1.7215815485996706) internal successors, (1045), 612 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1045 transitions. [2021-11-07 01:35:12,691 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1045 transitions. Word has length 42 [2021-11-07 01:35:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:12,692 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1045 transitions. [2021-11-07 01:35:12,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1045 transitions. [2021-11-07 01:35:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:35:12,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:12,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:12,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:12,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:12,916 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash -775365363, now seen corresponding path program 1 times [2021-11-07 01:35:12,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:12,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173917759] [2021-11-07 01:35:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:12,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:12,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:12,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:35:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:35:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:13,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:13,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:13,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173917759] [2021-11-07 01:35:13,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173917759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:13,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:13,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:13,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590838738] [2021-11-07 01:35:13,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:13,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:13,595 INFO L87 Difference]: Start difference. First operand 613 states and 1045 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:13,870 INFO L93 Difference]: Finished difference Result 2369 states and 4042 transitions. [2021-11-07 01:35:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:35:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:35:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:13,883 INFO L225 Difference]: With dead ends: 2369 [2021-11-07 01:35:13,883 INFO L226 Difference]: Without dead ends: 1774 [2021-11-07 01:35:13,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-11-07 01:35:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 612. [2021-11-07 01:35:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.7178217821782178) internal successors, (1041), 611 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1041 transitions. [2021-11-07 01:35:13,931 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1041 transitions. Word has length 44 [2021-11-07 01:35:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:13,932 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1041 transitions. [2021-11-07 01:35:13,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1041 transitions. [2021-11-07 01:35:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:35:13,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:13,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:13,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:14,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:14,163 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash 118601946, now seen corresponding path program 1 times [2021-11-07 01:35:14,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:14,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428402120] [2021-11-07 01:35:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:14,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:14,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:14,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:14,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:35:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:35:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:14,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:14,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428402120] [2021-11-07 01:35:14,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428402120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:14,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:14,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:35:14,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318689750] [2021-11-07 01:35:14,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:14,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:14,874 INFO L87 Difference]: Start difference. First operand 612 states and 1041 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:14,971 INFO L93 Difference]: Finished difference Result 1221 states and 2079 transitions. [2021-11-07 01:35:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:35:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:14,976 INFO L225 Difference]: With dead ends: 1221 [2021-11-07 01:35:14,976 INFO L226 Difference]: Without dead ends: 617 [2021-11-07 01:35:14,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-07 01:35:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 612. [2021-11-07 01:35:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.7128712871287128) internal successors, (1038), 611 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1038 transitions. [2021-11-07 01:35:15,024 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1038 transitions. Word has length 45 [2021-11-07 01:35:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:15,025 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1038 transitions. [2021-11-07 01:35:15,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1038 transitions. [2021-11-07 01:35:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:35:15,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:15,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:15,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:15,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:15,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1815980251, now seen corresponding path program 1 times [2021-11-07 01:35:15,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:15,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464737398] [2021-11-07 01:35:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:15,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:15,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:15,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:35:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:35:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:15,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:16,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:16,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464737398] [2021-11-07 01:35:16,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464737398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:16,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:16,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:16,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315960764] [2021-11-07 01:35:16,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:16,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:16,040 INFO L87 Difference]: Start difference. First operand 612 states and 1038 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:16,327 INFO L93 Difference]: Finished difference Result 2356 states and 4018 transitions. [2021-11-07 01:35:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:35:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:35:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:16,338 INFO L225 Difference]: With dead ends: 2356 [2021-11-07 01:35:16,338 INFO L226 Difference]: Without dead ends: 1770 [2021-11-07 01:35:16,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-11-07 01:35:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 612. [2021-11-07 01:35:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.7079207920792079) internal successors, (1035), 611 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1035 transitions. [2021-11-07 01:35:16,406 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1035 transitions. Word has length 46 [2021-11-07 01:35:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:16,406 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1035 transitions. [2021-11-07 01:35:16,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1035 transitions. [2021-11-07 01:35:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:35:16,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:16,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:16,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:16,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:16,622 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:16,623 INFO L85 PathProgramCache]: Analyzing trace with hash 80517770, now seen corresponding path program 1 times [2021-11-07 01:35:16,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:16,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498916545] [2021-11-07 01:35:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:16,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:16,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:16,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:35:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:17,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:17,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:17,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498916545] [2021-11-07 01:35:17,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498916545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:17,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:17,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:35:17,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449813674] [2021-11-07 01:35:17,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:17,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:17,296 INFO L87 Difference]: Start difference. First operand 612 states and 1035 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:17,424 INFO L93 Difference]: Finished difference Result 1523 states and 2563 transitions. [2021-11-07 01:35:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:35:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:17,432 INFO L225 Difference]: With dead ends: 1523 [2021-11-07 01:35:17,433 INFO L226 Difference]: Without dead ends: 1198 [2021-11-07 01:35:17,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-07 01:35:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 873. [2021-11-07 01:35:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.7474048442906573) internal successors, (1515), 872 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1515 transitions. [2021-11-07 01:35:17,512 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1515 transitions. Word has length 48 [2021-11-07 01:35:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:17,512 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1515 transitions. [2021-11-07 01:35:17,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1515 transitions. [2021-11-07 01:35:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:35:17,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:17,515 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:17,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:17,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:17,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash -347360903, now seen corresponding path program 1 times [2021-11-07 01:35:17,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:17,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174859931] [2021-11-07 01:35:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:17,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:17,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:17,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:35:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:18,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:18,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:18,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:18,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174859931] [2021-11-07 01:35:18,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174859931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:18,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:18,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:18,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636743668] [2021-11-07 01:35:18,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:18,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:18,528 INFO L87 Difference]: Start difference. First operand 873 states and 1515 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:18,674 INFO L93 Difference]: Finished difference Result 2196 states and 3804 transitions. [2021-11-07 01:35:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:35:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:18,684 INFO L225 Difference]: With dead ends: 2196 [2021-11-07 01:35:18,684 INFO L226 Difference]: Without dead ends: 1407 [2021-11-07 01:35:18,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-11-07 01:35:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1082. [2021-11-07 01:35:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1076 states have (on average 1.7639405204460967) internal successors, (1898), 1081 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1898 transitions. [2021-11-07 01:35:18,795 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1898 transitions. Word has length 60 [2021-11-07 01:35:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:18,796 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1898 transitions. [2021-11-07 01:35:18,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1898 transitions. [2021-11-07 01:35:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:35:18,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:18,799 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:18,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:19,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:19,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash 473250298, now seen corresponding path program 1 times [2021-11-07 01:35:19,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:19,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125509014] [2021-11-07 01:35:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:19,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:19,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:19,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:19,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:35:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:19,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:19,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:19,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:19,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125509014] [2021-11-07 01:35:19,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125509014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:19,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:19,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:19,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147452157] [2021-11-07 01:35:19,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:19,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:19,847 INFO L87 Difference]: Start difference. First operand 1082 states and 1898 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:20,007 INFO L93 Difference]: Finished difference Result 2855 states and 5018 transitions. [2021-11-07 01:35:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:35:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:20,021 INFO L225 Difference]: With dead ends: 2855 [2021-11-07 01:35:20,022 INFO L226 Difference]: Without dead ends: 1865 [2021-11-07 01:35:20,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-11-07 01:35:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1540. [2021-11-07 01:35:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1534 states have (on average 1.7861799217731422) internal successors, (2740), 1539 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2740 transitions. [2021-11-07 01:35:20,164 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2740 transitions. Word has length 61 [2021-11-07 01:35:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:20,165 INFO L470 AbstractCegarLoop]: Abstraction has 1540 states and 2740 transitions. [2021-11-07 01:35:20,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2740 transitions. [2021-11-07 01:35:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:35:20,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:20,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:20,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:20,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:20,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash 395846667, now seen corresponding path program 1 times [2021-11-07 01:35:20,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:20,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072548321] [2021-11-07 01:35:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:20,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:20,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:20,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:35:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:21,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:21,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:21,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072548321] [2021-11-07 01:35:21,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072548321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:21,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:21,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076649162] [2021-11-07 01:35:21,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:21,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:21,339 INFO L87 Difference]: Start difference. First operand 1540 states and 2740 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:21,538 INFO L93 Difference]: Finished difference Result 4209 states and 7513 transitions. [2021-11-07 01:35:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:35:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:21,556 INFO L225 Difference]: With dead ends: 4209 [2021-11-07 01:35:21,556 INFO L226 Difference]: Without dead ends: 2769 [2021-11-07 01:35:21,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-11-07 01:35:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2444. [2021-11-07 01:35:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2438 states have (on average 1.8059885151763742) internal successors, (4403), 2443 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 4403 transitions. [2021-11-07 01:35:21,749 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 4403 transitions. Word has length 62 [2021-11-07 01:35:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:21,749 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 4403 transitions. [2021-11-07 01:35:21,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 4403 transitions. [2021-11-07 01:35:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:35:21,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:21,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:21,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:21,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:21,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1223341707, now seen corresponding path program 1 times [2021-11-07 01:35:21,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:21,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146314367] [2021-11-07 01:35:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:21,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:21,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:21,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:35:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:22,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:22,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:22,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146314367] [2021-11-07 01:35:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146314367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:22,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:22,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984061021] [2021-11-07 01:35:22,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:22,809 INFO L87 Difference]: Start difference. First operand 2444 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:23,077 INFO L93 Difference]: Finished difference Result 6657 states and 12021 transitions. [2021-11-07 01:35:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:35:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:23,104 INFO L225 Difference]: With dead ends: 6657 [2021-11-07 01:35:23,104 INFO L226 Difference]: Without dead ends: 4347 [2021-11-07 01:35:23,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-11-07 01:35:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4022. [2021-11-07 01:35:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4022 states, 4016 states have (on average 1.8187250996015936) internal successors, (7304), 4021 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 7304 transitions. [2021-11-07 01:35:23,392 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 7304 transitions. Word has length 63 [2021-11-07 01:35:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:23,392 INFO L470 AbstractCegarLoop]: Abstraction has 4022 states and 7304 transitions. [2021-11-07 01:35:23,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 7304 transitions. [2021-11-07 01:35:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:35:23,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:23,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:23,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:23,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:23,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash 794339194, now seen corresponding path program 1 times [2021-11-07 01:35:23,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:23,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179227250] [2021-11-07 01:35:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:23,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:23,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:23,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:23,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:35:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:24,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:24,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:24,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179227250] [2021-11-07 01:35:24,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179227250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:24,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:24,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:24,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866445940] [2021-11-07 01:35:24,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:24,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:24,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:24,409 INFO L87 Difference]: Start difference. First operand 4022 states and 7304 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:24,820 INFO L93 Difference]: Finished difference Result 11107 states and 20207 transitions. [2021-11-07 01:35:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:35:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:24,878 INFO L225 Difference]: With dead ends: 11107 [2021-11-07 01:35:24,878 INFO L226 Difference]: Without dead ends: 7253 [2021-11-07 01:35:24,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2021-11-07 01:35:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 6928. [2021-11-07 01:35:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6928 states, 6922 states have (on average 1.8262062987575844) internal successors, (12641), 6927 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6928 states to 6928 states and 12641 transitions. [2021-11-07 01:35:25,374 INFO L78 Accepts]: Start accepts. Automaton has 6928 states and 12641 transitions. Word has length 64 [2021-11-07 01:35:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:25,375 INFO L470 AbstractCegarLoop]: Abstraction has 6928 states and 12641 transitions. [2021-11-07 01:35:25,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6928 states and 12641 transitions. [2021-11-07 01:35:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:35:25,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:25,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:25,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:25,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:25,604 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash 512853786, now seen corresponding path program 1 times [2021-11-07 01:35:25,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:25,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115018885] [2021-11-07 01:35:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:25,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:25,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:25,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:35:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:26,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:26,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:26,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115018885] [2021-11-07 01:35:26,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115018885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:26,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:26,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:26,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375707404] [2021-11-07 01:35:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:26,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,605 INFO L87 Difference]: Start difference. First operand 6928 states and 12641 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:27,338 INFO L93 Difference]: Finished difference Result 20151 states and 36829 transitions. [2021-11-07 01:35:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:27,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:35:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:27,386 INFO L225 Difference]: With dead ends: 20151 [2021-11-07 01:35:27,386 INFO L226 Difference]: Without dead ends: 13399 [2021-11-07 01:35:27,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13399 states. [2021-11-07 01:35:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13399 to 13074. [2021-11-07 01:35:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13074 states, 13068 states have (on average 1.8305785123966942) internal successors, (23922), 13073 states have internal predecessors, (23922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13074 states to 13074 states and 23922 transitions. [2021-11-07 01:35:28,138 INFO L78 Accepts]: Start accepts. Automaton has 13074 states and 23922 transitions. Word has length 65 [2021-11-07 01:35:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:28,138 INFO L470 AbstractCegarLoop]: Abstraction has 13074 states and 23922 transitions. [2021-11-07 01:35:28,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 13074 states and 23922 transitions. [2021-11-07 01:35:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:35:28,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:28,146 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:28,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:28,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:28,360 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1109428246, now seen corresponding path program 1 times [2021-11-07 01:35:28,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:28,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503534526] [2021-11-07 01:35:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:28,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:28,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:28,363 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:28,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:35:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:28,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:35:29,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:35:29,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:29,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503534526] [2021-11-07 01:35:29,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503534526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:29,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:29,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:29,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854409956] [2021-11-07 01:35:29,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:29,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:29,277 INFO L87 Difference]: Start difference. First operand 13074 states and 23922 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:32,478 INFO L93 Difference]: Finished difference Result 32319 states and 59131 transitions. [2021-11-07 01:35:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:35:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:35:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:32,531 INFO L225 Difference]: With dead ends: 32319 [2021-11-07 01:35:32,531 INFO L226 Difference]: Without dead ends: 19542 [2021-11-07 01:35:32,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:35:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19542 states. [2021-11-07 01:35:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19542 to 13041. [2021-11-07 01:35:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13041 states, 13035 states have (on average 1.8250863060989644) internal successors, (23790), 13040 states have internal predecessors, (23790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13041 states to 13041 states and 23790 transitions. [2021-11-07 01:35:33,305 INFO L78 Accepts]: Start accepts. Automaton has 13041 states and 23790 transitions. Word has length 66 [2021-11-07 01:35:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:33,305 INFO L470 AbstractCegarLoop]: Abstraction has 13041 states and 23790 transitions. [2021-11-07 01:35:33,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 13041 states and 23790 transitions. [2021-11-07 01:35:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:35:33,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:33,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:33,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:33,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:33,527 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -865904917, now seen corresponding path program 1 times [2021-11-07 01:35:33,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:33,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693456691] [2021-11-07 01:35:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:33,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:33,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:33,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:35:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:34,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:34,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:34,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693456691] [2021-11-07 01:35:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693456691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:34,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:34,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:34,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855375757] [2021-11-07 01:35:34,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:34,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:34,500 INFO L87 Difference]: Start difference. First operand 13041 states and 23790 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:35,804 INFO L93 Difference]: Finished difference Result 38322 states and 69983 transitions. [2021-11-07 01:35:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:35,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:35:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:35,876 INFO L225 Difference]: With dead ends: 38322 [2021-11-07 01:35:35,876 INFO L226 Difference]: Without dead ends: 25464 [2021-11-07 01:35:35,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25464 states. [2021-11-07 01:35:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25464 to 25139. [2021-11-07 01:35:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25139 states, 25133 states have (on average 1.8264035332033581) internal successors, (45903), 25138 states have internal predecessors, (45903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25139 states to 25139 states and 45903 transitions. [2021-11-07 01:35:37,286 INFO L78 Accepts]: Start accepts. Automaton has 25139 states and 45903 transitions. Word has length 66 [2021-11-07 01:35:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:37,286 INFO L470 AbstractCegarLoop]: Abstraction has 25139 states and 45903 transitions. [2021-11-07 01:35:37,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25139 states and 45903 transitions. [2021-11-07 01:35:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:35:37,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:37,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:37,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:37,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:37,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash 503094315, now seen corresponding path program 1 times [2021-11-07 01:35:37,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:37,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742810437] [2021-11-07 01:35:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:37,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:37,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:37,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:35:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:38,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:38,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:38,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:38,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742810437] [2021-11-07 01:35:38,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742810437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:38,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:38,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:38,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470906778] [2021-11-07 01:35:38,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:38,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:38,534 INFO L87 Difference]: Start difference. First operand 25139 states and 45903 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:40,345 INFO L93 Difference]: Finished difference Result 69255 states and 126058 transitions. [2021-11-07 01:35:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:35:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:40,434 INFO L225 Difference]: With dead ends: 69255 [2021-11-07 01:35:40,434 INFO L226 Difference]: Without dead ends: 44346 [2021-11-07 01:35:40,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44346 states. [2021-11-07 01:35:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44346 to 44021. [2021-11-07 01:35:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44021 states, 44015 states have (on average 1.8150176076337612) internal successors, (79888), 44020 states have internal predecessors, (79888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44021 states to 44021 states and 79888 transitions. [2021-11-07 01:35:43,270 INFO L78 Accepts]: Start accepts. Automaton has 44021 states and 79888 transitions. Word has length 67 [2021-11-07 01:35:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:43,271 INFO L470 AbstractCegarLoop]: Abstraction has 44021 states and 79888 transitions. [2021-11-07 01:35:43,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:43,271 INFO L276 IsEmpty]: Start isEmpty. Operand 44021 states and 79888 transitions. [2021-11-07 01:35:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:35:43,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:43,279 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:43,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:43,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:43,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1265034468, now seen corresponding path program 1 times [2021-11-07 01:35:43,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:43,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822528724] [2021-11-07 01:35:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:43,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:43,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:43,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:35:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:44,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:35:44,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:35:44,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:44,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822528724] [2021-11-07 01:35:44,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822528724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:44,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:44,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:44,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696149669] [2021-11-07 01:35:44,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:44,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:44,746 INFO L87 Difference]: Start difference. First operand 44021 states and 79888 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:51,893 INFO L93 Difference]: Finished difference Result 171352 states and 310853 transitions. [2021-11-07 01:35:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:35:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:35:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:52,377 INFO L225 Difference]: With dead ends: 171352 [2021-11-07 01:35:52,377 INFO L226 Difference]: Without dead ends: 127627 [2021-11-07 01:35:52,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127627 states. [2021-11-07 01:35:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127627 to 43763. [2021-11-07 01:35:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43763 states, 43757 states have (on average 1.8021345156203579) internal successors, (78856), 43762 states have internal predecessors, (78856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43763 states to 43763 states and 78856 transitions. [2021-11-07 01:35:56,117 INFO L78 Accepts]: Start accepts. Automaton has 43763 states and 78856 transitions. Word has length 68 [2021-11-07 01:35:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:56,117 INFO L470 AbstractCegarLoop]: Abstraction has 43763 states and 78856 transitions. [2021-11-07 01:35:56,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 43763 states and 78856 transitions. [2021-11-07 01:35:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:35:56,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:56,124 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:56,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:56,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:56,339 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1795848954, now seen corresponding path program 1 times [2021-11-07 01:35:56,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:56,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113858243] [2021-11-07 01:35:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:56,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:56,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:56,341 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:56,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:35:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:57,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:57,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:57,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113858243] [2021-11-07 01:35:57,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113858243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:57,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:57,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:35:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570110435] [2021-11-07 01:35:57,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:57,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:57,440 INFO L87 Difference]: Start difference. First operand 43763 states and 78856 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:59,765 INFO L93 Difference]: Finished difference Result 87549 states and 157726 transitions. [2021-11-07 01:35:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:35:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:59,838 INFO L225 Difference]: With dead ends: 87549 [2021-11-07 01:35:59,838 INFO L226 Difference]: Without dead ends: 44088 [2021-11-07 01:35:59,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44088 states. [2021-11-07 01:36:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44088 to 43763. [2021-11-07 01:36:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43763 states, 43757 states have (on average 1.799209269374043) internal successors, (78728), 43762 states have internal predecessors, (78728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43763 states to 43763 states and 78728 transitions. [2021-11-07 01:36:02,542 INFO L78 Accepts]: Start accepts. Automaton has 43763 states and 78728 transitions. Word has length 68 [2021-11-07 01:36:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:02,543 INFO L470 AbstractCegarLoop]: Abstraction has 43763 states and 78728 transitions. [2021-11-07 01:36:02,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 43763 states and 78728 transitions. [2021-11-07 01:36:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:36:02,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:02,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:02,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:02,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:02,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:36:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash -501987015, now seen corresponding path program 1 times [2021-11-07 01:36:02,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:02,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448957468] [2021-11-07 01:36:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:02,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:02,758 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:02,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6b04b3c-2487-4db0-a08a-0538e581bd9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:36:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:36:03,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:03,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:03,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:03,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448957468] [2021-11-07 01:36:03,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448957468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:03,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:03,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:36:03,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081691096] [2021-11-07 01:36:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:36:03,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:36:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:36:03,976 INFO L87 Difference]: Start difference. First operand 43763 states and 78728 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:07,787 INFO L93 Difference]: Finished difference Result 122791 states and 220648 transitions. [2021-11-07 01:36:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:36:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:36:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:08,067 INFO L225 Difference]: With dead ends: 122791 [2021-11-07 01:36:08,067 INFO L226 Difference]: Without dead ends: 79290 [2021-11-07 01:36:08,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:36:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79290 states.