./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH --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 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:03:58,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:03:58,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:03:58,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:03:58,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:03:58,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:03:58,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:03:58,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:03:58,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:03:58,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:03:58,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:03:58,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:03:58,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:03:58,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:03:58,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:03:58,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:03:58,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:03:58,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:03:58,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:03:58,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:03:58,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:03:58,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:03:58,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:03:58,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:03:58,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:03:58,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:03:58,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:03:58,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:03:58,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:03:58,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:03:58,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:03:58,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:03:58,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:03:58,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:03:58,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:03:58,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:03:58,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:03:58,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:03:58,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:03:58,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:03:58,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:03:58,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:03:59,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:03:59,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:03:59,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:03:59,018 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:03:59,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:03:59,019 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:03:59,019 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:03:59,019 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:03:59,019 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:03:59,019 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:03:59,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:03:59,020 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:03:59,020 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:03:59,020 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:03:59,020 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:03:59,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:03:59,021 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:03:59,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:03:59,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:03:59,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:03:59,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:03:59,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:03:59,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:03:59,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:03:59,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:03:59,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:03:59,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:03:59,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:03:59,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:03:59,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:03:59,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:03:59,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:03:59,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:03:59,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:03:59,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:03:59,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:03:59,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:03:59,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:03:59,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:03:59,032 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_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2021-11-03 05:03:59,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:03:59,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:03:59,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:03:59,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:03:59,290 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:03:59,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-03 05:03:59,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/9cfd6ead8/9e0188b4fb5445a681b809c518912c79/FLAGd0e4a5de9 [2021-11-03 05:04:00,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:04:00,080 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-03 05:04:00,116 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/9cfd6ead8/9e0188b4fb5445a681b809c518912c79/FLAGd0e4a5de9 [2021-11-03 05:04:00,211 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/9cfd6ead8/9e0188b4fb5445a681b809c518912c79 [2021-11-03 05:04:00,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:04:00,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:04:00,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:04:00,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:04:00,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:04:00,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:04:00" (1/1) ... [2021-11-03 05:04:00,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222768db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:00, skipping insertion in model container [2021-11-03 05:04:00,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:04:00" (1/1) ... [2021-11-03 05:04:00,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:04:00,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:04:00,463 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_6655964f-a2d6-4110-a213-abd4503f0bf1/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-03 05:04:00,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:04:00,784 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) [2021-11-03 05:04:00,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4cc2d8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:00, skipping insertion in model container [2021-11-03 05:04:00,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:04:00,786 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:04:00,788 INFO L168 Benchmark]: Toolchain (without parser) took 570.59 ms. Allocated memory is still 119.5 MB. Free memory was 91.8 MB in the beginning and 64.5 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:04:00,794 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory was 59.6 MB in the beginning and 59.5 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:04:00,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.86 ms. Allocated memory is still 119.5 MB. Free memory was 91.5 MB in the beginning and 64.5 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:04:00,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory was 59.6 MB in the beginning and 59.5 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 567.86 ms. Allocated memory is still 119.5 MB. Free memory was 91.5 MB in the beginning and 64.5 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 404]: 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_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH --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 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:04:03,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:04:03,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:04:03,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:04:03,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:04:03,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:04:03,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:04:03,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:04:03,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:04:03,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:04:03,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:04:03,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:04:03,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:04:03,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:04:03,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:04:03,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:04:03,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:04:03,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:04:03,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:04:03,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:04:03,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:04:03,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:04:03,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:04:03,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:04:03,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:04:03,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:04:03,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:04:03,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:04:03,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:04:03,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:04:03,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:04:03,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:04:03,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:04:03,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:04:03,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:04:03,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:04:03,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:04:03,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:04:03,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:04:03,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:04:03,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:04:03,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:04:03,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:04:03,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:04:03,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:04:03,197 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:04:03,198 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:04:03,198 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:04:03,198 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:04:03,198 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:04:03,198 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:04:03,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:04:03,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:04:03,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:04:03,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:04:03,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:04:03,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:04:03,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:04:03,202 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:04:03,202 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:04:03,202 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:04:03,202 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:04:03,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:04:03,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:04:03,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:04:03,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:04:03,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:04:03,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:04:03,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:04:03,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:04:03,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:04:03,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:04:03,204 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:04:03,205 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:04:03,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:04:03,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:04:03,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:04:03,206 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_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2021-11-03 05:04:03,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:04:03,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:04:03,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:04:03,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:04:03,609 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:04:03,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-03 05:04:03,681 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/5211f2b49/abbfa51f4b404ad49800479caa4b5ccd/FLAGe44dd64be [2021-11-03 05:04:04,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:04:04,435 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-03 05:04:04,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/5211f2b49/abbfa51f4b404ad49800479caa4b5ccd/FLAGe44dd64be [2021-11-03 05:04:04,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/data/5211f2b49/abbfa51f4b404ad49800479caa4b5ccd [2021-11-03 05:04:04,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:04:04,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:04:04,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:04:04,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:04:04,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:04:04,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:04:04" (1/1) ... [2021-11-03 05:04:04,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da8614e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:04, skipping insertion in model container [2021-11-03 05:04:04,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:04:04" (1/1) ... [2021-11-03 05:04:04,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:04:04,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:04:04,807 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_6655964f-a2d6-4110-a213-abd4503f0bf1/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-03 05:04:05,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:04:05,118 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:04:05,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:04:05,147 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_6655964f-a2d6-4110-a213-abd4503f0bf1/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-03 05:04:05,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:04:05,321 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:04:05,332 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_6655964f-a2d6-4110-a213-abd4503f0bf1/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-03 05:04:05,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:04:05,493 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:04:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05 WrapperNode [2021-11-03 05:04:05,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:04:05,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:04:05,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:04:05,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:04:05,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:04:05,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:04:05,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:04:05,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:04:05,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:05,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:06,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:06,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:04:06,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:04:06,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:04:06,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:04:06,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (1/1) ... [2021-11-03 05:04:06,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:04:06,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:04:06,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:04:06,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:04:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:04:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:04:06,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:04:06,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:04:13,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:04:13,953 INFO L299 CfgBuilder]: Removed 457 assume(true) statements. [2021-11-03 05:04:13,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:04:13 BoogieIcfgContainer [2021-11-03 05:04:13,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:04:13,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:04:13,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:04:13,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:04:13,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:04:04" (1/3) ... [2021-11-03 05:04:13,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e04adec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:04:13, skipping insertion in model container [2021-11-03 05:04:13,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:04:05" (2/3) ... [2021-11-03 05:04:13,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e04adec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:04:13, skipping insertion in model container [2021-11-03 05:04:13,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:04:13" (3/3) ... [2021-11-03 05:04:13,967 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2021-11-03 05:04:13,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:04:13,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 05:04:14,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:04:14,041 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 [2021-11-03 05:04:14,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:04:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 2212 states, 2206 states have (on average 1.9079782411604715) internal successors, (4209), 2211 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:04:14,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:14,121 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] [2021-11-03 05:04:14,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1136837276, now seen corresponding path program 1 times [2021-11-03 05:04:14,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:14,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809804747] [2021-11-03 05:04:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:14,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:14,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:14,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:14,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:04:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:04:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:14,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:14,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:14,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809804747] [2021-11-03 05:04:14,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809804747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:14,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:14,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:04:14,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707704792] [2021-11-03 05:04:14,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:04:14,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:14,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:04:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:04:14,784 INFO L87 Difference]: Start difference. First operand has 2212 states, 2206 states have (on average 1.9079782411604715) internal successors, (4209), 2211 states have internal predecessors, (4209), 0 states have call successors, (0), 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 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:14,892 INFO L93 Difference]: Finished difference Result 2231 states and 4232 transitions. [2021-11-03 05:04:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:04:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-03 05:04:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:14,930 INFO L225 Difference]: With dead ends: 2231 [2021-11-03 05:04:14,930 INFO L226 Difference]: Without dead ends: 2208 [2021-11-03 05:04:14,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:04:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-11-03 05:04:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2021-11-03 05:04:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2203 states have (on average 1.905129369042215) internal successors, (4197), 2207 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 4197 transitions. [2021-11-03 05:04:15,088 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 4197 transitions. Word has length 38 [2021-11-03 05:04:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 4197 transitions. [2021-11-03 05:04:15,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 4197 transitions. [2021-11-03 05:04:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:04:15,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:15,097 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] [2021-11-03 05:04:15,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:15,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:15,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1931640518, now seen corresponding path program 1 times [2021-11-03 05:04:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:15,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613699157] [2021-11-03 05:04:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:15,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:15,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:15,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:04:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:15,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:15,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:15,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613699157] [2021-11-03 05:04:15,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613699157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:15,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:15,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:04:15,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889921680] [2021-11-03 05:04:15,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:15,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:15,907 INFO L87 Difference]: Start difference. First operand 2208 states and 4197 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:16,073 INFO L93 Difference]: Finished difference Result 4403 states and 8375 transitions. [2021-11-03 05:04:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:04:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 40 [2021-11-03 05:04:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:16,089 INFO L225 Difference]: With dead ends: 4403 [2021-11-03 05:04:16,089 INFO L226 Difference]: Without dead ends: 2208 [2021-11-03 05:04:16,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-11-03 05:04:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2021-11-03 05:04:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2203 states have (on average 1.902405810258738) internal successors, (4191), 2207 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 4191 transitions. [2021-11-03 05:04:16,175 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 4191 transitions. Word has length 40 [2021-11-03 05:04:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:16,175 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 4191 transitions. [2021-11-03 05:04:16,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 4191 transitions. [2021-11-03 05:04:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 05:04:16,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:16,189 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:16,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:16,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:16,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:16,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash 767142480, now seen corresponding path program 1 times [2021-11-03 05:04:16,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:16,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643161985] [2021-11-03 05:04:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:16,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:16,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:16,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:16,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:04:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:04:16,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:16,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:17,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:17,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643161985] [2021-11-03 05:04:17,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643161985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:17,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:17,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:04:17,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474046452] [2021-11-03 05:04:17,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:04:17,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:04:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:04:17,113 INFO L87 Difference]: Start difference. First operand 2208 states and 4191 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:17,276 INFO L93 Difference]: Finished difference Result 4367 states and 8298 transitions. [2021-11-03 05:04:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:04:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 05:04:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:17,291 INFO L225 Difference]: With dead ends: 4367 [2021-11-03 05:04:17,291 INFO L226 Difference]: Without dead ends: 2181 [2021-11-03 05:04:17,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:04:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-03 05:04:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-03 05:04:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2176 states have (on average 1.9002757352941178) internal successors, (4135), 2180 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4135 transitions. [2021-11-03 05:04:17,376 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4135 transitions. Word has length 45 [2021-11-03 05:04:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:17,376 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 4135 transitions. [2021-11-03 05:04:17,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4135 transitions. [2021-11-03 05:04:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 05:04:17,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:17,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:17,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:17,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:17,596 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1809717618, now seen corresponding path program 1 times [2021-11-03 05:04:17,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:17,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493805148] [2021-11-03 05:04:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:17,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:17,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:17,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:04:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:18,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:18,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493805148] [2021-11-03 05:04:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493805148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:18,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:04:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683097379] [2021-11-03 05:04:18,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:18,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:18,272 INFO L87 Difference]: Start difference. First operand 2181 states and 4135 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:18,395 INFO L93 Difference]: Finished difference Result 4340 states and 8242 transitions. [2021-11-03 05:04:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:04:18,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 05:04:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:18,411 INFO L225 Difference]: With dead ends: 4340 [2021-11-03 05:04:18,411 INFO L226 Difference]: Without dead ends: 2181 [2021-11-03 05:04:18,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-03 05:04:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-03 05:04:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2176 states have (on average 1.8975183823529411) internal successors, (4129), 2180 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4129 transitions. [2021-11-03 05:04:18,510 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4129 transitions. Word has length 46 [2021-11-03 05:04:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:18,510 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 4129 transitions. [2021-11-03 05:04:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4129 transitions. [2021-11-03 05:04:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 05:04:18,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:18,513 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] [2021-11-03 05:04:18,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:18,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:18,729 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash -689633981, now seen corresponding path program 1 times [2021-11-03 05:04:18,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:18,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327392324] [2021-11-03 05:04:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:18,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:18,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:18,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:04:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:04:19,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:19,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:19,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:19,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327392324] [2021-11-03 05:04:19,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327392324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:19,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:19,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:04:19,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470869052] [2021-11-03 05:04:19,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:04:19,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:04:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:04:19,458 INFO L87 Difference]: Start difference. First operand 2181 states and 4129 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:19,791 INFO L93 Difference]: Finished difference Result 4334 states and 8225 transitions. [2021-11-03 05:04:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:04:19,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 05:04:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:19,809 INFO L225 Difference]: With dead ends: 4334 [2021-11-03 05:04:19,809 INFO L226 Difference]: Without dead ends: 2178 [2021-11-03 05:04:19,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:04:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-11-03 05:04:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2178. [2021-11-03 05:04:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2173 states have (on average 1.8964565117349286) internal successors, (4121), 2177 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 4121 transitions. [2021-11-03 05:04:19,912 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 4121 transitions. Word has length 51 [2021-11-03 05:04:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 4121 transitions. [2021-11-03 05:04:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 4121 transitions. [2021-11-03 05:04:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:04:19,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:19,916 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] [2021-11-03 05:04:19,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:20,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:20,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:20,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1997109485, now seen corresponding path program 1 times [2021-11-03 05:04:20,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:20,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296582278] [2021-11-03 05:04:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:20,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:20,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:20,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:20,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:04:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:20,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:04:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:20,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:20,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:20,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296582278] [2021-11-03 05:04:20,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296582278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:20,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:20,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:04:20,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145918522] [2021-11-03 05:04:20,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:04:20,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:04:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:04:20,894 INFO L87 Difference]: Start difference. First operand 2178 states and 4121 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:22,805 INFO L93 Difference]: Finished difference Result 8768 states and 16581 transitions. [2021-11-03 05:04:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:04:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 05:04:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:22,848 INFO L225 Difference]: With dead ends: 8768 [2021-11-03 05:04:22,848 INFO L226 Difference]: Without dead ends: 6630 [2021-11-03 05:04:22,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:04:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-11-03 05:04:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 2182. [2021-11-03 05:04:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2177 states have (on average 1.894809370693615) internal successors, (4125), 2181 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 4125 transitions. [2021-11-03 05:04:23,001 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 4125 transitions. Word has length 52 [2021-11-03 05:04:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:23,002 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 4125 transitions. [2021-11-03 05:04:23,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 4125 transitions. [2021-11-03 05:04:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:04:23,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:23,005 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] [2021-11-03 05:04:23,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:23,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:23,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1606415413, now seen corresponding path program 1 times [2021-11-03 05:04:23,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:23,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677760143] [2021-11-03 05:04:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:23,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:23,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:23,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:04:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:23,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:04:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:23,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:23,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:23,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677760143] [2021-11-03 05:04:23,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677760143] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:23,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:23,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:04:23,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560388493] [2021-11-03 05:04:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:04:23,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:04:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:04:23,997 INFO L87 Difference]: Start difference. First operand 2182 states and 4125 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:32,739 INFO L93 Difference]: Finished difference Result 5979 states and 11248 transitions. [2021-11-03 05:04:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:04:32,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 53 [2021-11-03 05:04:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:32,788 INFO L225 Difference]: With dead ends: 5979 [2021-11-03 05:04:32,789 INFO L226 Difference]: Without dead ends: 4699 [2021-11-03 05:04:32,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:04:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2021-11-03 05:04:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4008. [2021-11-03 05:04:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4003 states have (on average 1.898825880589558) internal successors, (7601), 4007 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 7601 transitions. [2021-11-03 05:04:33,020 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 7601 transitions. Word has length 53 [2021-11-03 05:04:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:33,020 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 7601 transitions. [2021-11-03 05:04:33,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 7601 transitions. [2021-11-03 05:04:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:04:33,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:33,024 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] [2021-11-03 05:04:33,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 05:04:33,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:33,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -681904201, now seen corresponding path program 1 times [2021-11-03 05:04:33,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:33,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077909082] [2021-11-03 05:04:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:33,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:33,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:33,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:33,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:04:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:04:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:33,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:34,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:34,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077909082] [2021-11-03 05:04:34,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077909082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:34,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:34,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:04:34,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260805223] [2021-11-03 05:04:34,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:34,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:34,091 INFO L87 Difference]: Start difference. First operand 4008 states and 7601 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:35,774 INFO L93 Difference]: Finished difference Result 7574 states and 14250 transitions. [2021-11-03 05:04:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:04:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-03 05:04:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:35,801 INFO L225 Difference]: With dead ends: 7574 [2021-11-03 05:04:35,801 INFO L226 Difference]: Without dead ends: 4460 [2021-11-03 05:04:35,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:04:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-11-03 05:04:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3911. [2021-11-03 05:04:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3911 states, 3906 states have (on average 1.880952380952381) internal successors, (7347), 3910 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 7347 transitions. [2021-11-03 05:04:36,015 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 7347 transitions. Word has length 54 [2021-11-03 05:04:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:36,016 INFO L470 AbstractCegarLoop]: Abstraction has 3911 states and 7347 transitions. [2021-11-03 05:04:36,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 7347 transitions. [2021-11-03 05:04:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 05:04:36,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:36,018 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] [2021-11-03 05:04:36,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:36,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:36,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1383941645, now seen corresponding path program 1 times [2021-11-03 05:04:36,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:36,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312933158] [2021-11-03 05:04:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:36,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:36,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:36,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:04:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:04:36,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:36,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:37,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:37,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312933158] [2021-11-03 05:04:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312933158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:37,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:37,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:04:37,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297377534] [2021-11-03 05:04:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:04:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:04:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:04:37,047 INFO L87 Difference]: Start difference. First operand 3911 states and 7347 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:37,848 INFO L93 Difference]: Finished difference Result 27955 states and 52732 transitions. [2021-11-03 05:04:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:04:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-03 05:04:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:37,912 INFO L225 Difference]: With dead ends: 27955 [2021-11-03 05:04:37,913 INFO L226 Difference]: Without dead ends: 24080 [2021-11-03 05:04:37,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:04:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-11-03 05:04:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 7343. [2021-11-03 05:04:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 7338 states have (on average 1.8856636685745434) internal successors, (13837), 7342 states have internal predecessors, (13837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 13837 transitions. [2021-11-03 05:04:38,366 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 13837 transitions. Word has length 55 [2021-11-03 05:04:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:38,366 INFO L470 AbstractCegarLoop]: Abstraction has 7343 states and 13837 transitions. [2021-11-03 05:04:38,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 13837 transitions. [2021-11-03 05:04:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 05:04:38,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:38,368 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] [2021-11-03 05:04:38,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 05:04:38,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:38,583 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1517955151, now seen corresponding path program 1 times [2021-11-03 05:04:38,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:38,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431529951] [2021-11-03 05:04:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:38,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:38,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:04:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:04:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:39,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:39,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:39,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431529951] [2021-11-03 05:04:39,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431529951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:39,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:39,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:04:39,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979143971] [2021-11-03 05:04:39,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:39,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:39,440 INFO L87 Difference]: Start difference. First operand 7343 states and 13837 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:40,261 INFO L93 Difference]: Finished difference Result 22152 states and 41795 transitions. [2021-11-03 05:04:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:04:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-03 05:04:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:40,303 INFO L225 Difference]: With dead ends: 22152 [2021-11-03 05:04:40,303 INFO L226 Difference]: Without dead ends: 17932 [2021-11-03 05:04:40,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:04:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17932 states. [2021-11-03 05:04:40,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17932 to 11294. [2021-11-03 05:04:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11294 states, 11289 states have (on average 1.8861723801931083) internal successors, (21293), 11293 states have internal predecessors, (21293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11294 states to 11294 states and 21293 transitions. [2021-11-03 05:04:40,789 INFO L78 Accepts]: Start accepts. Automaton has 11294 states and 21293 transitions. Word has length 55 [2021-11-03 05:04:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:40,790 INFO L470 AbstractCegarLoop]: Abstraction has 11294 states and 21293 transitions. [2021-11-03 05:04:40,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 11294 states and 21293 transitions. [2021-11-03 05:04:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:04:40,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:40,792 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] [2021-11-03 05:04:40,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:41,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:41,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -464517445, now seen corresponding path program 1 times [2021-11-03 05:04:41,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:41,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065008999] [2021-11-03 05:04:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:41,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:41,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:41,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:04:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:04:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:41,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:41,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065008999] [2021-11-03 05:04:41,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065008999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:41,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:41,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:04:41,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422815999] [2021-11-03 05:04:41,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:04:41,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:04:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:04:41,975 INFO L87 Difference]: Start difference. First operand 11294 states and 21293 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:44,586 INFO L93 Difference]: Finished difference Result 60514 states and 114479 transitions. [2021-11-03 05:04:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:04:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 57 [2021-11-03 05:04:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:44,728 INFO L225 Difference]: With dead ends: 60514 [2021-11-03 05:04:44,728 INFO L226 Difference]: Without dead ends: 52343 [2021-11-03 05:04:44,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:04:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52343 states. [2021-11-03 05:04:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52343 to 17974. [2021-11-03 05:04:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17974 states, 17969 states have (on average 1.8894763203294562) internal successors, (33952), 17973 states have internal predecessors, (33952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17974 states to 17974 states and 33952 transitions. [2021-11-03 05:04:45,955 INFO L78 Accepts]: Start accepts. Automaton has 17974 states and 33952 transitions. Word has length 57 [2021-11-03 05:04:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 17974 states and 33952 transitions. [2021-11-03 05:04:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17974 states and 33952 transitions. [2021-11-03 05:04:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:04:45,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:45,958 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:45,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 05:04:46,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:46,186 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1030522672, now seen corresponding path program 1 times [2021-11-03 05:04:46,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:46,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254976158] [2021-11-03 05:04:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:46,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:46,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:46,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:04:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:46,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:46,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:46,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254976158] [2021-11-03 05:04:46,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254976158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:46,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:46,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:04:46,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328604060] [2021-11-03 05:04:46,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:46,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:46,974 INFO L87 Difference]: Start difference. First operand 17974 states and 33952 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:48,280 INFO L93 Difference]: Finished difference Result 43556 states and 81883 transitions. [2021-11-03 05:04:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:04:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 05:04:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:48,327 INFO L225 Difference]: With dead ends: 43556 [2021-11-03 05:04:48,327 INFO L226 Difference]: Without dead ends: 26955 [2021-11-03 05:04:48,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26955 states. [2021-11-03 05:04:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26955 to 17851. [2021-11-03 05:04:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17851 states, 17846 states have (on average 1.8773394598229296) internal successors, (33503), 17850 states have internal predecessors, (33503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 33503 transitions. [2021-11-03 05:04:49,177 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 33503 transitions. Word has length 64 [2021-11-03 05:04:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:49,177 INFO L470 AbstractCegarLoop]: Abstraction has 17851 states and 33503 transitions. [2021-11-03 05:04:49,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 33503 transitions. [2021-11-03 05:04:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:04:49,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:49,180 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:49,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:49,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:49,406 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash -952811629, now seen corresponding path program 1 times [2021-11-03 05:04:49,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:49,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913624466] [2021-11-03 05:04:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:49,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:49,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:49,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:04:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:49,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:49,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:50,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:50,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:50,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913624466] [2021-11-03 05:04:50,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913624466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:50,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:50,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:04:50,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984647095] [2021-11-03 05:04:50,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:50,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:50,164 INFO L87 Difference]: Start difference. First operand 17851 states and 33503 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) [2021-11-03 05:04:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:50,945 INFO L93 Difference]: Finished difference Result 32723 states and 61355 transitions. [2021-11-03 05:04:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:04:50,945 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 64 [2021-11-03 05:04:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:50,969 INFO L225 Difference]: With dead ends: 32723 [2021-11-03 05:04:50,969 INFO L226 Difference]: Without dead ends: 17866 [2021-11-03 05:04:50,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17866 states. [2021-11-03 05:04:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17866 to 17851. [2021-11-03 05:04:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17851 states, 17846 states have (on average 1.8693824946766782) internal successors, (33361), 17850 states have internal predecessors, (33361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 33361 transitions. [2021-11-03 05:04:51,738 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 33361 transitions. Word has length 64 [2021-11-03 05:04:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:51,738 INFO L470 AbstractCegarLoop]: Abstraction has 17851 states and 33361 transitions. [2021-11-03 05:04:51,738 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) [2021-11-03 05:04:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 33361 transitions. [2021-11-03 05:04:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 05:04:51,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:51,740 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] [2021-11-03 05:04:51,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:51,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:51,950 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash -12378986, now seen corresponding path program 1 times [2021-11-03 05:04:51,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:51,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032334939] [2021-11-03 05:04:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:51,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:51,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:51,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:04:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:04:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:52,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:52,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:52,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032334939] [2021-11-03 05:04:52,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032334939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:52,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:52,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:04:52,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931447345] [2021-11-03 05:04:52,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:04:52,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:52,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:04:52,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:04:52,916 INFO L87 Difference]: Start difference. First operand 17851 states and 33361 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:55,244 INFO L93 Difference]: Finished difference Result 51372 states and 95917 transitions. [2021-11-03 05:04:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:04:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 [2021-11-03 05:04:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:55,284 INFO L225 Difference]: With dead ends: 51372 [2021-11-03 05:04:55,284 INFO L226 Difference]: Without dead ends: 36816 [2021-11-03 05:04:55,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:04:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36816 states. [2021-11-03 05:04:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36816 to 14863. [2021-11-03 05:04:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14863 states, 14858 states have (on average 1.8596042536007538) internal successors, (27630), 14862 states have internal predecessors, (27630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 27630 transitions. [2021-11-03 05:04:56,058 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 27630 transitions. Word has length 65 [2021-11-03 05:04:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:56,059 INFO L470 AbstractCegarLoop]: Abstraction has 14863 states and 27630 transitions. [2021-11-03 05:04:56,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 27630 transitions. [2021-11-03 05:04:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 05:04:56,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:56,067 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] [2021-11-03 05:04:56,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:04:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:56,281 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:04:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1023496236, now seen corresponding path program 1 times [2021-11-03 05:04:56,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:56,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201146528] [2021-11-03 05:04:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:56,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:56,284 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:56,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:04:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:04:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:57,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:57,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:57,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201146528] [2021-11-03 05:04:57,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201146528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:57,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:57,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:04:57,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49913583] [2021-11-03 05:04:57,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:04:57,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:57,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:04:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:04:57,360 INFO L87 Difference]: Start difference. First operand 14863 states and 27630 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:05:07,917 INFO L93 Difference]: Finished difference Result 99954 states and 185320 transitions. [2021-11-03 05:05:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 05:05:07,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 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 [2021-11-03 05:05:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:05:08,037 INFO L225 Difference]: With dead ends: 99954 [2021-11-03 05:05:08,037 INFO L226 Difference]: Without dead ends: 86520 [2021-11-03 05:05:08,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:05:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86520 states. [2021-11-03 05:05:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86520 to 35694. [2021-11-03 05:05:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35694 states, 35689 states have (on average 1.865196559163888) internal successors, (66567), 35693 states have internal predecessors, (66567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35694 states to 35694 states and 66567 transitions. [2021-11-03 05:05:10,106 INFO L78 Accepts]: Start accepts. Automaton has 35694 states and 66567 transitions. Word has length 65 [2021-11-03 05:05:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:05:10,106 INFO L470 AbstractCegarLoop]: Abstraction has 35694 states and 66567 transitions. [2021-11-03 05:05:10,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 35694 states and 66567 transitions. [2021-11-03 05:05:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:05:10,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:05:10,108 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] [2021-11-03 05:05:10,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:05:10,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:05:10,318 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:05:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:05:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2042978228, now seen corresponding path program 1 times [2021-11-03 05:05:10,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:05:10,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193395458] [2021-11-03 05:05:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:05:10,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:05:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:05:10,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:05:10,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:05:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:05:10,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:05:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:05:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:11,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:11,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:11,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193395458] [2021-11-03 05:05:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193395458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:11,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:11,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:05:11,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974295793] [2021-11-03 05:05:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:05:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:05:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:05:11,282 INFO L87 Difference]: Start difference. First operand 35694 states and 66567 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:05:13,962 INFO L93 Difference]: Finished difference Result 105146 states and 196212 transitions. [2021-11-03 05:05:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:05:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 05:05:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:05:14,050 INFO L225 Difference]: With dead ends: 105146 [2021-11-03 05:05:14,050 INFO L226 Difference]: Without dead ends: 70937 [2021-11-03 05:05:14,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:05:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70937 states. [2021-11-03 05:05:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70937 to 70935. [2021-11-03 05:05:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70935 states, 70930 states have (on average 1.866149725081066) internal successors, (132366), 70934 states have internal predecessors, (132366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70935 states to 70935 states and 132366 transitions. [2021-11-03 05:05:17,261 INFO L78 Accepts]: Start accepts. Automaton has 70935 states and 132366 transitions. Word has length 66 [2021-11-03 05:05:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:05:17,261 INFO L470 AbstractCegarLoop]: Abstraction has 70935 states and 132366 transitions. [2021-11-03 05:05:17,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 70935 states and 132366 transitions. [2021-11-03 05:05:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:05:17,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:05:17,263 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] [2021-11-03 05:05:17,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:05:17,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:05:17,464 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:05:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:05:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1461013053, now seen corresponding path program 1 times [2021-11-03 05:05:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:05:17,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575106292] [2021-11-03 05:05:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:05:17,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:05:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:05:17,465 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:05:17,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:05:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:05:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:05:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:05:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:18,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:18,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:18,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575106292] [2021-11-03 05:05:18,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575106292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:18,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:18,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 05:05:18,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911631404] [2021-11-03 05:05:18,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:05:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:05:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:05:18,710 INFO L87 Difference]: Start difference. First operand 70935 states and 132366 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:05:24,813 INFO L93 Difference]: Finished difference Result 100934 states and 188433 transitions. [2021-11-03 05:05:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:05:24,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 [2021-11-03 05:05:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:05:24,954 INFO L225 Difference]: With dead ends: 100934 [2021-11-03 05:05:24,954 INFO L226 Difference]: Without dead ends: 100917 [2021-11-03 05:05:24,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:05:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100917 states. [2021-11-03 05:05:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100917 to 79732. [2021-11-03 05:05:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79732 states, 79727 states have (on average 1.8661808421237474) internal successors, (148785), 79731 states have internal predecessors, (148785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79732 states to 79732 states and 148785 transitions. [2021-11-03 05:05:28,725 INFO L78 Accepts]: Start accepts. Automaton has 79732 states and 148785 transitions. Word has length 67 [2021-11-03 05:05:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:05:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 79732 states and 148785 transitions. [2021-11-03 05:05:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 79732 states and 148785 transitions. [2021-11-03 05:05:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:05:28,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:05:28,727 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] [2021-11-03 05:05:28,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:05:28,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:05:28,928 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:05:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:05:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash -593313736, now seen corresponding path program 1 times [2021-11-03 05:05:28,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:05:28,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191135455] [2021-11-03 05:05:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:05:28,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:05:28,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:05:28,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:05:28,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655964f-a2d6-4110-a213-abd4503f0bf1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:05:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:05:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:05:29,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:05:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:29,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:29,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:29,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191135455] [2021-11-03 05:05:29,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191135455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:29,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:29,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:05:29,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788338814] [2021-11-03 05:05:29,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:05:29,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:05:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:05:29,840 INFO L87 Difference]: Start difference. First operand 79732 states and 148785 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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)