./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product33.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_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/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_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/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_25fea9a4-e07e-4652-a91f-cf64c556f514/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 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:42,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:42,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:42,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:42,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:42,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:42,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:42,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:42,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:42,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:42,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:42,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:42,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:42,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:42,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:42,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:42,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:42,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:42,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:42,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:42,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:42,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:42,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:42,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:42,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:42,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:42,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:42,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:42,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:42,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:42,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:42,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:42,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:42,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:42,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:42,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:42,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:42,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:42,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:42,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:42,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:42,640 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:13:42,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:42,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:42,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:42,673 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:42,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:42,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:42,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:13:42,674 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:42,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:42,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:13:42,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:13:42,675 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:42,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:13:42,676 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:13:42,676 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:13:42,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:42,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:13:42,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:13:42,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:13:42,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:42,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:42,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:42,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:42,679 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:42,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:13:42,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:42,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:42,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:42,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:42,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:42,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:42,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:42,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:42,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:42,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:13:42,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:13:42,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:42,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:42,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:42,683 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_25fea9a4-e07e-4652-a91f-cf64c556f514/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d [2021-11-07 02:13:43,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:43,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:43,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:43,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:43,120 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:43,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2021-11-07 02:13:43,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/077f08691/7d6d95ec79ed46728a0d8a2f70b66aba/FLAG937e92fcc [2021-11-07 02:13:43,940 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:43,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2021-11-07 02:13:43,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/077f08691/7d6d95ec79ed46728a0d8a2f70b66aba/FLAG937e92fcc [2021-11-07 02:13:44,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/077f08691/7d6d95ec79ed46728a0d8a2f70b66aba [2021-11-07 02:13:44,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:44,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:44,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:44,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:44,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:44,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:44" (1/1) ... [2021-11-07 02:13:44,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6351a9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:44, skipping insertion in model container [2021-11-07 02:13:44,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:44" (1/1) ... [2021-11-07 02:13:44,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:44,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:45,070 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_25fea9a4-e07e-4652-a91f-cf64c556f514/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2021-11-07 02:13:45,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:45,094 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 02:13:45,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d79cc1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:45, skipping insertion in model container [2021-11-07 02:13:45,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:45,096 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:13:45,099 INFO L168 Benchmark]: Toolchain (without parser) took 1010.44 ms. Allocated memory is still 96.5 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 26.3 kB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:13:45,100 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory is still 75.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:13:45,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1007.53 ms. Allocated memory is still 96.5 MB. Free memory was 55.7 MB in the beginning and 56.2 MB in the end (delta: -574.8 kB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:13:45,105 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory is still 75.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1007.53 ms. Allocated memory is still 96.5 MB. Free memory was 55.7 MB in the beginning and 56.2 MB in the end (delta: -574.8 kB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1334]: 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_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/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_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/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_25fea9a4-e07e-4652-a91f-cf64c556f514/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 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:47,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:47,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:47,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:47,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:47,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:47,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:47,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:47,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:47,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:47,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:47,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:47,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:47,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:47,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:47,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:47,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:47,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:47,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:47,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:47,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:47,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:47,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:47,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:47,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:47,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:47,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:47,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:47,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:47,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:47,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:47,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:47,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:47,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:47,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:47,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:47,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:47,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:47,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:47,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:47,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:47,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:13:47,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:47,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:47,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:47,881 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:47,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:47,882 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:47,882 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:47,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:47,882 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:47,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:47,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:13:47,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:13:47,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:47,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:47,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:47,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:47,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:47,887 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:13:47,888 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:13:47,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:13:47,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:47,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:47,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:47,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:47,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:13:47,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:47,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:47,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:47,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:47,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:47,891 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:13:47,892 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:47,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:47,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:47,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:47,893 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_25fea9a4-e07e-4652-a91f-cf64c556f514/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d [2021-11-07 02:13:48,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:48,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:48,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:48,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:48,443 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:48,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2021-11-07 02:13:48,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/4b8f935b7/a0c72968b6824756a8ee461e7013a0a9/FLAG560f6d09a [2021-11-07 02:13:49,408 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:49,408 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2021-11-07 02:13:49,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/4b8f935b7/a0c72968b6824756a8ee461e7013a0a9/FLAG560f6d09a [2021-11-07 02:13:49,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/data/4b8f935b7/a0c72968b6824756a8ee461e7013a0a9 [2021-11-07 02:13:49,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:49,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:49,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:49,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:49,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:49,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:49" (1/1) ... [2021-11-07 02:13:49,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:49, skipping insertion in model container [2021-11-07 02:13:49,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:49" (1/1) ... [2021-11-07 02:13:49,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:49,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:50,490 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_25fea9a4-e07e-4652-a91f-cf64c556f514/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2021-11-07 02:13:50,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:50,522 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:13:50,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:50,739 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_25fea9a4-e07e-4652-a91f-cf64c556f514/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2021-11-07 02:13:50,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:50,756 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:13:50,928 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_25fea9a4-e07e-4652-a91f-cf64c556f514/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2021-11-07 02:13:50,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:50,996 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:13:50,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50 WrapperNode [2021-11-07 02:13:50,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:50,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:50,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:13:50,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:13:51,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:51,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:13:51,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:13:51,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:13:51,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:13:51,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:13:51,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:13:51,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:13:51,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (1/1) ... [2021-11-07 02:13:51,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:51,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:13:51,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:13:51,529 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:13:51,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:13:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:13:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:13:51,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:13:56,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:13:56,713 INFO L299 CfgBuilder]: Removed 407 assume(true) statements. [2021-11-07 02:13:56,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:56 BoogieIcfgContainer [2021-11-07 02:13:56,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:13:56,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:13:56,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:13:56,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:13:56,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:49" (1/3) ... [2021-11-07 02:13:56,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df976bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:56, skipping insertion in model container [2021-11-07 02:13:56,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:50" (2/3) ... [2021-11-07 02:13:56,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df976bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:56, skipping insertion in model container [2021-11-07 02:13:56,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:56" (3/3) ... [2021-11-07 02:13:56,728 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product33.cil.c [2021-11-07 02:13:56,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:13:56,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:13:56,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:13:56,815 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 02:13:56,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:13:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 591 states, 588 states have (on average 1.7295918367346939) internal successors, (1017), 590 states have internal predecessors, (1017), 0 states have call successors, (0), 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 02:13:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:13:56,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:56,867 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 02:13:56,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2079250929, now seen corresponding path program 1 times [2021-11-07 02:13:56,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:56,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883065107] [2021-11-07 02:13:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:56,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:56,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:56,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:13:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:13:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:57,804 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 02:13:57,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:58,076 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 02:13:58,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:58,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883065107] [2021-11-07 02:13:58,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883065107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:58,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:58,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:13:58,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412951417] [2021-11-07 02:13:58,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:13:58,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:13:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:13:58,108 INFO L87 Difference]: Start difference. First operand has 591 states, 588 states have (on average 1.7295918367346939) internal successors, (1017), 590 states have internal predecessors, (1017), 0 states have call successors, (0), 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 31.0) internal successors, (62), 2 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 02:13:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:58,179 INFO L93 Difference]: Finished difference Result 936 states and 1586 transitions. [2021-11-07 02:13:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:13:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 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 02:13:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:58,201 INFO L225 Difference]: With dead ends: 936 [2021-11-07 02:13:58,202 INFO L226 Difference]: Without dead ends: 537 [2021-11-07 02:13:58,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 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 02:13:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-07 02:13:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-07 02:13:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 535 states have (on average 1.7327102803738317) internal successors, (927), 536 states have internal predecessors, (927), 0 states have call successors, (0), 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 02:13:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 927 transitions. [2021-11-07 02:13:58,314 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 927 transitions. Word has length 62 [2021-11-07 02:13:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:58,315 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 927 transitions. [2021-11-07 02:13:58,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 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 02:13:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 927 transitions. [2021-11-07 02:13:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:13:58,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:58,331 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 02:13:58,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:58,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:58,545 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -427650722, now seen corresponding path program 1 times [2021-11-07 02:13:58,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:58,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541475994] [2021-11-07 02:13:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:58,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:58,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:58,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:13:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:59,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:13:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:59,392 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 02:13:59,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:59,626 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 02:13:59,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:59,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541475994] [2021-11-07 02:13:59,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541475994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:59,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:59,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:13:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124021119] [2021-11-07 02:13:59,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:59,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:59,632 INFO L87 Difference]: Start difference. First operand 537 states and 927 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:59,773 INFO L93 Difference]: Finished difference Result 1581 states and 2733 transitions. [2021-11-07 02:13:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:13:59,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:13:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:59,787 INFO L225 Difference]: With dead ends: 1581 [2021-11-07 02:13:59,787 INFO L226 Difference]: Without dead ends: 1059 [2021-11-07 02:13:59,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 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 02:13:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-11-07 02:13:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 536. [2021-11-07 02:13:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 534 states have (on average 1.7265917602996255) internal successors, (922), 535 states have internal predecessors, (922), 0 states have call successors, (0), 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 02:13:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 922 transitions. [2021-11-07 02:13:59,879 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 922 transitions. Word has length 63 [2021-11-07 02:13:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:59,880 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 922 transitions. [2021-11-07 02:13:59,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 922 transitions. [2021-11-07 02:13:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:13:59,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:59,892 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 02:13:59,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:00,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1352682052, now seen corresponding path program 1 times [2021-11-07 02:14:00,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:00,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368780530] [2021-11-07 02:14:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:00,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:00,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:00,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:14:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:14:00,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:00,959 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 02:14:00,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:01,170 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 02:14:01,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:01,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368780530] [2021-11-07 02:14:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368780530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:01,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:01,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061065912] [2021-11-07 02:14:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:01,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:01,176 INFO L87 Difference]: Start difference. First operand 536 states and 922 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 02:14:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:01,492 INFO L93 Difference]: Finished difference Result 2061 states and 3550 transitions. [2021-11-07 02:14:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:14:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 02:14:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:01,507 INFO L225 Difference]: With dead ends: 2061 [2021-11-07 02:14:01,507 INFO L226 Difference]: Without dead ends: 1543 [2021-11-07 02:14:01,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 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 02:14:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-07 02:14:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 535. [2021-11-07 02:14:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 533 states have (on average 1.722326454033771) internal successors, (918), 534 states have internal predecessors, (918), 0 states have call successors, (0), 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 02:14:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 918 transitions. [2021-11-07 02:14:01,570 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 918 transitions. Word has length 65 [2021-11-07 02:14:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:01,571 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 918 transitions. [2021-11-07 02:14:01,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 02:14:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 918 transitions. [2021-11-07 02:14:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:14:01,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:01,574 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 02:14:01,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:01,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:01,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash -669728617, now seen corresponding path program 1 times [2021-11-07 02:14:01,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:01,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174554379] [2021-11-07 02:14:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:01,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:01,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:01,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:14:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:14:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:02,513 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 02:14:02,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:02,715 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 02:14:02,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:02,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174554379] [2021-11-07 02:14:02,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174554379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:02,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:02,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:02,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862876302] [2021-11-07 02:14:02,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:02,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:02,721 INFO L87 Difference]: Start difference. First operand 535 states and 918 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:02,809 INFO L93 Difference]: Finished difference Result 1067 states and 1833 transitions. [2021-11-07 02:14:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:14:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:02,815 INFO L225 Difference]: With dead ends: 1067 [2021-11-07 02:14:02,815 INFO L226 Difference]: Without dead ends: 540 [2021-11-07 02:14:02,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 02:14:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-07 02:14:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 535. [2021-11-07 02:14:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 533 states have (on average 1.7166979362101313) internal successors, (915), 534 states have internal predecessors, (915), 0 states have call successors, (0), 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 02:14:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 915 transitions. [2021-11-07 02:14:02,864 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 915 transitions. Word has length 66 [2021-11-07 02:14:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:02,865 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 915 transitions. [2021-11-07 02:14:02,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 915 transitions. [2021-11-07 02:14:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:14:02,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:02,868 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 02:14:02,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:03,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:03,086 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash 197168940, now seen corresponding path program 1 times [2021-11-07 02:14:03,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:03,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564227351] [2021-11-07 02:14:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:03,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:03,090 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:03,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:14:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:14:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:03,970 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 02:14:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:04,208 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 02:14:04,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:04,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564227351] [2021-11-07 02:14:04,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564227351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:04,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:04,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:04,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996342504] [2021-11-07 02:14:04,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:04,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:04,212 INFO L87 Difference]: Start difference. First operand 535 states and 915 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:14:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:04,525 INFO L93 Difference]: Finished difference Result 2048 states and 3526 transitions. [2021-11-07 02:14:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:14:04,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:14:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:04,537 INFO L225 Difference]: With dead ends: 2048 [2021-11-07 02:14:04,537 INFO L226 Difference]: Without dead ends: 1539 [2021-11-07 02:14:04,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 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 02:14:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-11-07 02:14:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 535. [2021-11-07 02:14:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 533 states have (on average 1.7110694183864916) internal successors, (912), 534 states have internal predecessors, (912), 0 states have call successors, (0), 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 02:14:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 912 transitions. [2021-11-07 02:14:04,598 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 912 transitions. Word has length 67 [2021-11-07 02:14:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:04,598 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 912 transitions. [2021-11-07 02:14:04,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:14:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 912 transitions. [2021-11-07 02:14:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:14:04,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:04,601 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:04,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:04,816 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1752118041, now seen corresponding path program 1 times [2021-11-07 02:14:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:04,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378456154] [2021-11-07 02:14:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:04,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:04,820 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:04,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:14:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:05,695 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 02:14:05,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:05,919 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 02:14:05,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:05,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378456154] [2021-11-07 02:14:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378456154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:05,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:05,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:05,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755425438] [2021-11-07 02:14:05,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:05,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:05,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:05,922 INFO L87 Difference]: Start difference. First operand 535 states and 912 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:14:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:06,059 INFO L93 Difference]: Finished difference Result 1335 states and 2276 transitions. [2021-11-07 02:14:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 69 [2021-11-07 02:14:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:06,069 INFO L225 Difference]: With dead ends: 1335 [2021-11-07 02:14:06,069 INFO L226 Difference]: Without dead ends: 1044 [2021-11-07 02:14:06,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 02:14:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-07 02:14:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 753. [2021-11-07 02:14:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 751 states have (on average 1.744340878828229) internal successors, (1310), 752 states have internal predecessors, (1310), 0 states have call successors, (0), 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 02:14:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1310 transitions. [2021-11-07 02:14:06,152 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1310 transitions. Word has length 69 [2021-11-07 02:14:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:06,152 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1310 transitions. [2021-11-07 02:14:06,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:14:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1310 transitions. [2021-11-07 02:14:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:14:06,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:06,156 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:06,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:14:06,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:06,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash 63506328, now seen corresponding path program 1 times [2021-11-07 02:14:06,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:06,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088287801] [2021-11-07 02:14:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:06,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:06,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:06,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:06,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:14:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:07,216 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 02:14:07,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:07,459 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 02:14:07,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088287801] [2021-11-07 02:14:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088287801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:07,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:07,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:07,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028946441] [2021-11-07 02:14:07,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:07,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:07,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:07,462 INFO L87 Difference]: Start difference. First operand 753 states and 1310 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:07,605 INFO L93 Difference]: Finished difference Result 1879 states and 3271 transitions. [2021-11-07 02:14:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 02:14:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:07,617 INFO L225 Difference]: With dead ends: 1879 [2021-11-07 02:14:07,618 INFO L226 Difference]: Without dead ends: 1210 [2021-11-07 02:14:07,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-07 02:14:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 919. [2021-11-07 02:14:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 917 states have (on average 1.756815703380589) internal successors, (1611), 918 states have internal predecessors, (1611), 0 states have call successors, (0), 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 02:14:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1611 transitions. [2021-11-07 02:14:07,716 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1611 transitions. Word has length 81 [2021-11-07 02:14:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:07,716 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1611 transitions. [2021-11-07 02:14:07,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1611 transitions. [2021-11-07 02:14:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:14:07,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:07,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:07,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:14:07,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:07,938 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:07,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2096657993, now seen corresponding path program 1 times [2021-11-07 02:14:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:07,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263944249] [2021-11-07 02:14:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:07,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:07,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:07,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:14:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:08,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:08,792 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 02:14:08,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:09,006 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 02:14:09,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:09,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263944249] [2021-11-07 02:14:09,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263944249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:09,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:09,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:09,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739713552] [2021-11-07 02:14:09,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:09,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:09,009 INFO L87 Difference]: Start difference. First operand 919 states and 1611 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:09,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:09,171 INFO L93 Difference]: Finished difference Result 2409 states and 4239 transitions. [2021-11-07 02:14:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:14:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:09,184 INFO L225 Difference]: With dead ends: 2409 [2021-11-07 02:14:09,185 INFO L226 Difference]: Without dead ends: 1582 [2021-11-07 02:14:09,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-07 02:14:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1291. [2021-11-07 02:14:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1289 states have (on average 1.7757951900698217) internal successors, (2289), 1290 states have internal predecessors, (2289), 0 states have call successors, (0), 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 02:14:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 2289 transitions. [2021-11-07 02:14:09,329 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 2289 transitions. Word has length 82 [2021-11-07 02:14:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:09,330 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 2289 transitions. [2021-11-07 02:14:09,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 2289 transitions. [2021-11-07 02:14:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:14:09,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:09,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:09,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:09,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:09,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:09,553 INFO L85 PathProgramCache]: Analyzing trace with hash 73155654, now seen corresponding path program 1 times [2021-11-07 02:14:09,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:09,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908554189] [2021-11-07 02:14:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:09,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:09,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:09,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:14:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:10,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:10,666 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 02:14:10,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:10,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908554189] [2021-11-07 02:14:10,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908554189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:10,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:10,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:10,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364370788] [2021-11-07 02:14:10,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:10,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:10,670 INFO L87 Difference]: Start difference. First operand 1291 states and 2289 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:10,887 INFO L93 Difference]: Finished difference Result 3505 states and 6242 transitions. [2021-11-07 02:14:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:14:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:10,905 INFO L225 Difference]: With dead ends: 3505 [2021-11-07 02:14:10,905 INFO L226 Difference]: Without dead ends: 2314 [2021-11-07 02:14:10,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-11-07 02:14:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2023. [2021-11-07 02:14:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2021 states have (on average 1.793171697179614) internal successors, (3624), 2022 states have internal predecessors, (3624), 0 states have call successors, (0), 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 02:14:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3624 transitions. [2021-11-07 02:14:11,095 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3624 transitions. Word has length 83 [2021-11-07 02:14:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:11,096 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 3624 transitions. [2021-11-07 02:14:11,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3624 transitions. [2021-11-07 02:14:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:14:11,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:11,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:11,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:11,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:11,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1047117370, now seen corresponding path program 1 times [2021-11-07 02:14:11,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:11,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117232752] [2021-11-07 02:14:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:11,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:11,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:11,324 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:11,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:14:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:12,337 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 02:14:12,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:12,567 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 02:14:12,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:12,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117232752] [2021-11-07 02:14:12,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117232752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:12,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:12,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:12,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061430985] [2021-11-07 02:14:12,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:12,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:12,572 INFO L87 Difference]: Start difference. First operand 2023 states and 3624 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:12,854 INFO L93 Difference]: Finished difference Result 5437 states and 9766 transitions. [2021-11-07 02:14:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:12,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:14:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:12,882 INFO L225 Difference]: With dead ends: 5437 [2021-11-07 02:14:12,882 INFO L226 Difference]: Without dead ends: 3548 [2021-11-07 02:14:12,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-11-07 02:14:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3257. [2021-11-07 02:14:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3255 states have (on average 1.8030721966205838) internal successors, (5869), 3256 states have internal predecessors, (5869), 0 states have call successors, (0), 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 02:14:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 5869 transitions. [2021-11-07 02:14:13,217 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 5869 transitions. Word has length 84 [2021-11-07 02:14:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:13,218 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 5869 transitions. [2021-11-07 02:14:13,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 5869 transitions. [2021-11-07 02:14:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:14:13,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:13,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:13,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:13,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:13,442 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash 118983735, now seen corresponding path program 1 times [2021-11-07 02:14:13,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:13,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079855543] [2021-11-07 02:14:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:13,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:13,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:13,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:14:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:14,416 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 02:14:14,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:14,658 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 02:14:14,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:14,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079855543] [2021-11-07 02:14:14,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079855543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:14,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201241274] [2021-11-07 02:14:14,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:14,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:14,661 INFO L87 Difference]: Start difference. First operand 3257 states and 5869 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:15,020 INFO L93 Difference]: Finished difference Result 8855 states and 15984 transitions. [2021-11-07 02:14:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:14:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:15,065 INFO L225 Difference]: With dead ends: 8855 [2021-11-07 02:14:15,065 INFO L226 Difference]: Without dead ends: 5766 [2021-11-07 02:14:15,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-11-07 02:14:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5475. [2021-11-07 02:14:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5473 states have (on average 1.8077836652658505) internal successors, (9894), 5474 states have internal predecessors, (9894), 0 states have call successors, (0), 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 02:14:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 9894 transitions. [2021-11-07 02:14:15,579 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 9894 transitions. Word has length 85 [2021-11-07 02:14:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 9894 transitions. [2021-11-07 02:14:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 9894 transitions. [2021-11-07 02:14:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:14:15,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:15,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:15,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:15,817 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -603672425, now seen corresponding path program 1 times [2021-11-07 02:14:15,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:15,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752685559] [2021-11-07 02:14:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:15,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:15,822 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:15,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:14:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:16,821 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 02:14:16,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:17,045 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 02:14:17,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:17,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752685559] [2021-11-07 02:14:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752685559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:17,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:17,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:17,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317281599] [2021-11-07 02:14:17,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:17,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:17,048 INFO L87 Difference]: Start difference. First operand 5475 states and 9894 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:14:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:17,658 INFO L93 Difference]: Finished difference Result 15835 states and 28670 transitions. [2021-11-07 02:14:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:17,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 02:14:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:17,711 INFO L225 Difference]: With dead ends: 15835 [2021-11-07 02:14:17,711 INFO L226 Difference]: Without dead ends: 10536 [2021-11-07 02:14:17,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 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 02:14:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-11-07 02:14:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 10245. [2021-11-07 02:14:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10243 states have (on average 1.811090500829835) internal successors, (18551), 10244 states have internal predecessors, (18551), 0 states have call successors, (0), 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 02:14:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 18551 transitions. [2021-11-07 02:14:18,556 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 18551 transitions. Word has length 86 [2021-11-07 02:14:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:18,557 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 18551 transitions. [2021-11-07 02:14:18,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:14:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 18551 transitions. [2021-11-07 02:14:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:14:18,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:18,574 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:18,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:18,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:18,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2113926265, now seen corresponding path program 1 times [2021-11-07 02:14:18,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:18,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344867892] [2021-11-07 02:14:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:18,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:18,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:18,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:18,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:14:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:19,850 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 02:14:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:20,085 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 02:14:20,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344867892] [2021-11-07 02:14:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344867892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:20,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:20,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:20,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398472438] [2021-11-07 02:14:20,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:20,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:20,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:20,088 INFO L87 Difference]: Start difference. First operand 10245 states and 18551 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 02:14:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:23,159 INFO L93 Difference]: Finished difference Result 25294 states and 45806 transitions. [2021-11-07 02:14:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:14:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 87 [2021-11-07 02:14:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:23,210 INFO L225 Difference]: With dead ends: 25294 [2021-11-07 02:14:23,210 INFO L226 Difference]: Without dead ends: 15303 [2021-11-07 02:14:23,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 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 02:14:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15303 states. [2021-11-07 02:14:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15303 to 10212. [2021-11-07 02:14:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10212 states, 10210 states have (on average 1.8040156709108717) internal successors, (18419), 10211 states have internal predecessors, (18419), 0 states have call successors, (0), 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 02:14:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10212 states to 10212 states and 18419 transitions. [2021-11-07 02:14:24,214 INFO L78 Accepts]: Start accepts. Automaton has 10212 states and 18419 transitions. Word has length 87 [2021-11-07 02:14:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:24,214 INFO L470 AbstractCegarLoop]: Abstraction has 10212 states and 18419 transitions. [2021-11-07 02:14:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 02:14:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 10212 states and 18419 transitions. [2021-11-07 02:14:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:14:24,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:24,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:24,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:24,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:24,448 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1612210842, now seen corresponding path program 1 times [2021-11-07 02:14:24,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:24,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393498250] [2021-11-07 02:14:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:24,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:24,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:24,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:14:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:25,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:25,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:25,541 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 02:14:25,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:25,780 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 02:14:25,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:25,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393498250] [2021-11-07 02:14:25,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393498250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:25,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:25,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:25,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091371802] [2021-11-07 02:14:25,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:25,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:25,783 INFO L87 Difference]: Start difference. First operand 10212 states and 18419 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 02:14:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:26,705 INFO L93 Difference]: Finished difference Result 29878 states and 53952 transitions. [2021-11-07 02:14:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-07 02:14:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:26,757 INFO L225 Difference]: With dead ends: 29878 [2021-11-07 02:14:26,757 INFO L226 Difference]: Without dead ends: 19849 [2021-11-07 02:14:26,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 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 02:14:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19849 states. [2021-11-07 02:14:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19849 to 19558. [2021-11-07 02:14:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19558 states, 19556 states have (on average 1.804254448762528) internal successors, (35284), 19557 states have internal predecessors, (35284), 0 states have call successors, (0), 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 02:14:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19558 states to 19558 states and 35284 transitions. [2021-11-07 02:14:28,199 INFO L78 Accepts]: Start accepts. Automaton has 19558 states and 35284 transitions. Word has length 87 [2021-11-07 02:14:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 19558 states and 35284 transitions. [2021-11-07 02:14:28,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 02:14:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 19558 states and 35284 transitions. [2021-11-07 02:14:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:14:28,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:28,219 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:28,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:28,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:28,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 615129126, now seen corresponding path program 1 times [2021-11-07 02:14:28,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:28,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793441107] [2021-11-07 02:14:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:28,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:28,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:28,444 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:28,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:14:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:29,541 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 02:14:29,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:29,781 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 02:14:29,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793441107] [2021-11-07 02:14:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793441107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:29,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:29,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:29,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17262207] [2021-11-07 02:14:29,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:29,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:29,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:29,784 INFO L87 Difference]: Start difference. First operand 19558 states and 35284 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 02:14:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:31,695 INFO L93 Difference]: Finished difference Result 58102 states and 104861 transitions. [2021-11-07 02:14:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 88 [2021-11-07 02:14:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:31,789 INFO L225 Difference]: With dead ends: 58102 [2021-11-07 02:14:31,789 INFO L226 Difference]: Without dead ends: 38731 [2021-11-07 02:14:31,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 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 02:14:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38731 states. [2021-11-07 02:14:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38731 to 38440. [2021-11-07 02:14:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38440 states, 38438 states have (on average 1.802096883292575) internal successors, (69269), 38439 states have internal predecessors, (69269), 0 states have call successors, (0), 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 02:14:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38440 states to 38440 states and 69269 transitions. [2021-11-07 02:14:34,373 INFO L78 Accepts]: Start accepts. Automaton has 38440 states and 69269 transitions. Word has length 88 [2021-11-07 02:14:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:34,374 INFO L470 AbstractCegarLoop]: Abstraction has 38440 states and 69269 transitions. [2021-11-07 02:14:34,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 02:14:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 38440 states and 69269 transitions. [2021-11-07 02:14:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:14:34,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:34,399 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:34,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:34,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:34,612 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1210867405, now seen corresponding path program 1 times [2021-11-07 02:14:34,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:34,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880350417] [2021-11-07 02:14:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:34,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:34,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:34,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:34,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:14:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:35,908 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 02:14:35,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:36,234 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 02:14:36,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:36,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880350417] [2021-11-07 02:14:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880350417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:36,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:36,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:36,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694729851] [2021-11-07 02:14:36,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:36,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:36,237 INFO L87 Difference]: Start difference. First operand 38440 states and 69269 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:14:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:43,485 INFO L93 Difference]: Finished difference Result 149157 states and 268623 transitions. [2021-11-07 02:14:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:14:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 89 [2021-11-07 02:14:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:43,781 INFO L225 Difference]: With dead ends: 149157 [2021-11-07 02:14:43,781 INFO L226 Difference]: Without dead ends: 110970 [2021-11-07 02:14:43,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:14:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110970 states. [2021-11-07 02:14:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110970 to 38182. [2021-11-07 02:14:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38182 states, 38180 states have (on average 1.7872446306966998) internal successors, (68237), 38181 states have internal predecessors, (68237), 0 states have call successors, (0), 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 02:14:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38182 states to 38182 states and 68237 transitions. [2021-11-07 02:14:47,189 INFO L78 Accepts]: Start accepts. Automaton has 38182 states and 68237 transitions. Word has length 89 [2021-11-07 02:14:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:47,190 INFO L470 AbstractCegarLoop]: Abstraction has 38182 states and 68237 transitions. [2021-11-07 02:14:47,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:14:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38182 states and 68237 transitions. [2021-11-07 02:14:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:14:47,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:47,218 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:47,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:47,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:47,437 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1782282261, now seen corresponding path program 1 times [2021-11-07 02:14:47,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:47,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186376019] [2021-11-07 02:14:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:47,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:47,439 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:47,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:14:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:48,533 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 02:14:48,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:48,722 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 02:14:48,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:48,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186376019] [2021-11-07 02:14:48,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186376019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:48,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:48,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:48,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777272523] [2021-11-07 02:14:48,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:48,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:48,725 INFO L87 Difference]: Start difference. First operand 38182 states and 68237 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:50,669 INFO L93 Difference]: Finished difference Result 76396 states and 136529 transitions. [2021-11-07 02:14:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:14:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:50,722 INFO L225 Difference]: With dead ends: 76396 [2021-11-07 02:14:50,723 INFO L226 Difference]: Without dead ends: 38473 [2021-11-07 02:14:50,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 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 02:14:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38473 states. [2021-11-07 02:14:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38473 to 38182. [2021-11-07 02:14:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38182 states, 38180 states have (on average 1.7838920900995285) internal successors, (68109), 38181 states have internal predecessors, (68109), 0 states have call successors, (0), 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 02:14:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38182 states to 38182 states and 68109 transitions. [2021-11-07 02:14:52,779 INFO L78 Accepts]: Start accepts. Automaton has 38182 states and 68109 transitions. Word has length 89 [2021-11-07 02:14:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:52,779 INFO L470 AbstractCegarLoop]: Abstraction has 38182 states and 68109 transitions. [2021-11-07 02:14:52,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 38182 states and 68109 transitions. [2021-11-07 02:14:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:14:52,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:52,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:52,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:52,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:52,995 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1600178136, now seen corresponding path program 1 times [2021-11-07 02:14:52,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:52,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10889218] [2021-11-07 02:14:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:52,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:52,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:52,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25fea9a4-e07e-4652-a91f-cf64c556f514/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:14:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:54,005 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 02:14:54,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:54,215 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 02:14:54,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:54,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10889218] [2021-11-07 02:14:54,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10889218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:54,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:54,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:54,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827915824] [2021-11-07 02:14:54,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:54,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:54,218 INFO L87 Difference]: Start difference. First operand 38182 states and 68109 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:14:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:57,596 INFO L93 Difference]: Finished difference Result 106134 states and 188955 transitions. [2021-11-07 02:14:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-07 02:14:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:57,696 INFO L225 Difference]: With dead ends: 106134 [2021-11-07 02:14:57,696 INFO L226 Difference]: Without dead ends: 68171 [2021-11-07 02:14:57,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 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 02:14:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68171 states.