./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:23,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:23,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:23,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:23,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:23,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:23,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:23,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:23,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:23,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:23,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:23,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:23,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:23,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:23,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:23,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:23,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:23,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:23,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:23,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:23,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:23,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:23,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:23,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:23,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:23,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:23,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:23,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:23,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:23,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:23,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:23,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:23,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:23,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:23,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:23,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:23,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:23,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:23,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:23,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:23,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:23,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:04:23,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:23,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:23,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:23,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:23,992 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:23,992 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:23,992 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:04:23,993 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:23,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:23,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:04:24,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:04:24,000 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:24,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:04:24,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:04:24,001 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:04:24,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:24,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:04:24,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:04:24,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:04:24,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:24,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:24,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:24,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:24,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:24,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:04:24,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:24,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:24,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:24,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:24,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:24,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:24,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:24,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:24,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:24,008 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:04:24,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:04:24,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:24,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:24,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:24,010 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_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2021-11-07 02:04:24,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:24,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:24,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:24,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:24,373 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:24,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-07 02:04:24,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/af2a1067d/f8d6a94f813c4127849881816d2d8d08/FLAG69cec6886 [2021-11-07 02:04:25,049 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:25,050 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-07 02:04:25,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/af2a1067d/f8d6a94f813c4127849881816d2d8d08/FLAG69cec6886 [2021-11-07 02:04:25,291 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/af2a1067d/f8d6a94f813c4127849881816d2d8d08 [2021-11-07 02:04:25,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:25,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:25,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:25,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:25,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:25,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:25" (1/1) ... [2021-11-07 02:04:25,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b34c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:25, skipping insertion in model container [2021-11-07 02:04:25,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:25" (1/1) ... [2021-11-07 02:04:25,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:25,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:25,794 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_24732086-ceaf-4ecf-ae79-5c41a2b7c695/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-07 02:04:25,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:25,921 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:04:25,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46241d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:25, skipping insertion in model container [2021-11-07 02:04:25,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:25,923 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:04:25,925 INFO L168 Benchmark]: Toolchain (without parser) took 628.96 ms. Allocated memory is still 111.1 MB. Free memory was 70.4 MB in the beginning and 79.4 MB in the end (delta: -9.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:25,926 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory was 89.4 MB in the beginning and 89.3 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:04:25,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 626.28 ms. Allocated memory is still 111.1 MB. Free memory was 70.2 MB in the beginning and 79.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:25,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory was 89.4 MB in the beginning and 89.3 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 626.28 ms. Allocated memory is still 111.1 MB. Free memory was 70.2 MB in the beginning and 79.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 475]: 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_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:28,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:28,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:28,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:28,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:28,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:28,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:28,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:28,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:28,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:28,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:28,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:28,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:28,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:28,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:28,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:28,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:28,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:28,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:28,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:28,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:28,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:28,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:28,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:28,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:28,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:28,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:28,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:28,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:28,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:28,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:28,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:28,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:28,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:28,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:28,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:28,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:28,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:28,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:28,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:28,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:28,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:04:28,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:28,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:28,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:28,259 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:28,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:28,259 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:28,259 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:28,259 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:28,260 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:28,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:28,262 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:04:28,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:04:28,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:28,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:28,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:28,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:28,263 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:28,263 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:04:28,263 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:04:28,264 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:04:28,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:28,264 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:28,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:28,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:28,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:04:28,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:28,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:28,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:28,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:28,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:28,266 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:04:28,266 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:28,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:28,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:28,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:28,267 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_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2021-11-07 02:04:28,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:28,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:28,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:28,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:28,646 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:28,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-07 02:04:28,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/b4707e85d/cfe1482a254e474ea84387a74f13c904/FLAG7ee87faab [2021-11-07 02:04:29,482 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:29,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-07 02:04:29,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/b4707e85d/cfe1482a254e474ea84387a74f13c904/FLAG7ee87faab [2021-11-07 02:04:29,737 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/data/b4707e85d/cfe1482a254e474ea84387a74f13c904 [2021-11-07 02:04:29,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:29,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:29,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:29,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:29,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:29,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:29" (1/1) ... [2021-11-07 02:04:29,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5056c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:29, skipping insertion in model container [2021-11-07 02:04:29,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:29" (1/1) ... [2021-11-07 02:04:29,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:29,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:30,220 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_24732086-ceaf-4ecf-ae79-5c41a2b7c695/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-07 02:04:30,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:30,421 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:04:30,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:30,490 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-07 02:04:30,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:30,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:04:30,632 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_24732086-ceaf-4ecf-ae79-5c41a2b7c695/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-07 02:04:30,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:30,737 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:04:30,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30 WrapperNode [2021-11-07 02:04:30,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:30,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:30,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:04:30,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:04:30,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:30,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:31,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:04:31,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:04:31,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:04:31,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:04:31,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:04:31,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:04:31,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:04:31,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (1/1) ... [2021-11-07 02:04:31,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:31,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:04:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:04:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:04:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:04:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:04:31,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:04:40,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:04:40,070 INFO L299 CfgBuilder]: Removed 589 assume(true) statements. [2021-11-07 02:04:40,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:40 BoogieIcfgContainer [2021-11-07 02:04:40,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:04:40,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:04:40,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:04:40,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:04:40,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:04:29" (1/3) ... [2021-11-07 02:04:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d80d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:40, skipping insertion in model container [2021-11-07 02:04:40,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:30" (2/3) ... [2021-11-07 02:04:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d80d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:40, skipping insertion in model container [2021-11-07 02:04:40,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:40" (3/3) ... [2021-11-07 02:04:40,084 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2021-11-07 02:04:40,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:04:40,089 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:04:40,147 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:04:40,153 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:04:40,154 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:04:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 2512 states, 2506 states have (on average 1.892657621707901) internal successors, (4743), 2511 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 02:04:40,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:40,246 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] [2021-11-07 02:04:40,246 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)] === [2021-11-07 02:04:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1633009766, now seen corresponding path program 1 times [2021-11-07 02:04:40,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:40,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544438048] [2021-11-07 02:04:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:40,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:40,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:40,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:04:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:40,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:04:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:40,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:40,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544438048] [2021-11-07 02:04:40,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544438048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:40,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:40,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:04:40,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090938926] [2021-11-07 02:04:40,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:04:40,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:04:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:40,955 INFO L87 Difference]: Start difference. First operand has 2512 states, 2506 states have (on average 1.892657621707901) internal successors, (4743), 2511 states have internal predecessors, (4743), 0 states have call successors, (0), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:41,089 INFO L93 Difference]: Finished difference Result 2531 states and 4766 transitions. [2021-11-07 02:04:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:04:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-07 02:04:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:41,124 INFO L225 Difference]: With dead ends: 2531 [2021-11-07 02:04:41,124 INFO L226 Difference]: Without dead ends: 2508 [2021-11-07 02:04:41,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-07 02:04:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2021-11-07 02:04:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2503 states have (on average 1.8901318417898523) internal successors, (4731), 2507 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4731 transitions. [2021-11-07 02:04:41,303 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4731 transitions. Word has length 37 [2021-11-07 02:04:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:41,304 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 4731 transitions. [2021-11-07 02:04:41,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4731 transitions. [2021-11-07 02:04:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 02:04:41,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:41,316 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] [2021-11-07 02:04:41,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:41,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:41,526 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)] === [2021-11-07 02:04:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1228149007, now seen corresponding path program 1 times [2021-11-07 02:04:41,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:41,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307166757] [2021-11-07 02:04:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:41,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:41,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:41,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:04:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:42,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:42,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:42,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307166757] [2021-11-07 02:04:42,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307166757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:42,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:42,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:42,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040453845] [2021-11-07 02:04:42,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:42,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:42,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:42,169 INFO L87 Difference]: Start difference. First operand 2508 states and 4731 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:42,321 INFO L93 Difference]: Finished difference Result 5003 states and 9443 transitions. [2021-11-07 02:04:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 02:04:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:42,338 INFO L225 Difference]: With dead ends: 5003 [2021-11-07 02:04:42,339 INFO L226 Difference]: Without dead ends: 2508 [2021-11-07 02:04:42,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-07 02:04:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2021-11-07 02:04:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2503 states have (on average 1.8877347183379944) internal successors, (4725), 2507 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4725 transitions. [2021-11-07 02:04:42,472 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4725 transitions. Word has length 39 [2021-11-07 02:04:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:42,473 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 4725 transitions. [2021-11-07 02:04:42,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4725 transitions. [2021-11-07 02:04:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:04:42,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:42,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:42,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:42,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:42,698 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)] === [2021-11-07 02:04:42,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash -56341435, now seen corresponding path program 1 times [2021-11-07 02:04:42,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:42,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654035055] [2021-11-07 02:04:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:42,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:42,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:42,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:42,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:04:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:43,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:43,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:43,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654035055] [2021-11-07 02:04:43,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654035055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:43,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:43,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:43,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886423356] [2021-11-07 02:04:43,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:43,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:43,300 INFO L87 Difference]: Start difference. First operand 2508 states and 4725 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:43,503 INFO L93 Difference]: Finished difference Result 4967 states and 9366 transitions. [2021-11-07 02:04:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:04:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:43,520 INFO L225 Difference]: With dead ends: 4967 [2021-11-07 02:04:43,520 INFO L226 Difference]: Without dead ends: 2481 [2021-11-07 02:04:43,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:04:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-07 02:04:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-07 02:04:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2476 states have (on average 1.885702746365105) internal successors, (4669), 2480 states have internal predecessors, (4669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4669 transitions. [2021-11-07 02:04:43,677 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4669 transitions. Word has length 44 [2021-11-07 02:04:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:43,677 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 4669 transitions. [2021-11-07 02:04:43,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4669 transitions. [2021-11-07 02:04:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:04:43,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:43,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:43,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:43,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:43,900 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)] === [2021-11-07 02:04:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2055500003, now seen corresponding path program 1 times [2021-11-07 02:04:43,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:43,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159123379] [2021-11-07 02:04:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:43,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:43,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:43,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:04:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:44,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:44,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:44,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:44,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159123379] [2021-11-07 02:04:44,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159123379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:44,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:44,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:44,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442552845] [2021-11-07 02:04:44,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:44,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:44,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:44,577 INFO L87 Difference]: Start difference. First operand 2481 states and 4669 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:44,725 INFO L93 Difference]: Finished difference Result 4940 states and 9310 transitions. [2021-11-07 02:04:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:04:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:44,741 INFO L225 Difference]: With dead ends: 4940 [2021-11-07 02:04:44,741 INFO L226 Difference]: Without dead ends: 2481 [2021-11-07 02:04:44,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-07 02:04:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-07 02:04:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2476 states have (on average 1.8832794830371566) internal successors, (4663), 2480 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4663 transitions. [2021-11-07 02:04:44,879 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4663 transitions. Word has length 45 [2021-11-07 02:04:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 4663 transitions. [2021-11-07 02:04:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4663 transitions. [2021-11-07 02:04:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:04:44,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:44,883 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] [2021-11-07 02:04:44,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:45,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:45,097 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)] === [2021-11-07 02:04:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2113423090, now seen corresponding path program 1 times [2021-11-07 02:04:45,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:45,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970162863] [2021-11-07 02:04:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:45,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:45,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:45,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:45,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:04:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:04:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:45,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:45,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:45,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970162863] [2021-11-07 02:04:45,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970162863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:45,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:45,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:04:45,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293983037] [2021-11-07 02:04:45,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:04:45,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:04:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:04:45,803 INFO L87 Difference]: Start difference. First operand 2481 states and 4663 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:46,080 INFO L93 Difference]: Finished difference Result 4934 states and 9293 transitions. [2021-11-07 02:04:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:04:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 02:04:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:46,097 INFO L225 Difference]: With dead ends: 4934 [2021-11-07 02:04:46,098 INFO L226 Difference]: Without dead ends: 2478 [2021-11-07 02:04:46,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:04:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-11-07 02:04:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2478. [2021-11-07 02:04:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2473 states have (on average 1.8823291548726244) internal successors, (4655), 2477 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 4655 transitions. [2021-11-07 02:04:46,230 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 4655 transitions. Word has length 50 [2021-11-07 02:04:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:46,230 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 4655 transitions. [2021-11-07 02:04:46,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 4655 transitions. [2021-11-07 02:04:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:04:46,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:46,233 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] [2021-11-07 02:04:46,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:46,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:46,448 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)] === [2021-11-07 02:04:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -976794846, now seen corresponding path program 1 times [2021-11-07 02:04:46,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:46,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513421736] [2021-11-07 02:04:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:46,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:46,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:46,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:46,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:04:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:47,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:47,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:47,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513421736] [2021-11-07 02:04:47,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513421736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:47,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:47,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:04:47,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156282721] [2021-11-07 02:04:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:04:47,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:04:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:04:47,216 INFO L87 Difference]: Start difference. First operand 2478 states and 4655 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:49,097 INFO L93 Difference]: Finished difference Result 9968 states and 18723 transitions. [2021-11-07 02:04:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:04:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:04:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:49,146 INFO L225 Difference]: With dead ends: 9968 [2021-11-07 02:04:49,146 INFO L226 Difference]: Without dead ends: 7530 [2021-11-07 02:04:49,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:04:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2021-11-07 02:04:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 2482. [2021-11-07 02:04:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2477 states have (on average 1.8809043197416229) internal successors, (4659), 2481 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 4659 transitions. [2021-11-07 02:04:49,394 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 4659 transitions. Word has length 51 [2021-11-07 02:04:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:49,395 INFO L470 AbstractCegarLoop]: Abstraction has 2482 states and 4659 transitions. [2021-11-07 02:04:49,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 4659 transitions. [2021-11-07 02:04:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:04:49,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:49,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:49,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:49,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:49,612 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)] === [2021-11-07 02:04:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash 559828842, now seen corresponding path program 1 times [2021-11-07 02:04:49,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:49,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676873528] [2021-11-07 02:04:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:49,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:49,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:49,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:04:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:50,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:50,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:50,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:50,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676873528] [2021-11-07 02:04:50,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676873528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:50,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:50,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:04:50,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815303472] [2021-11-07 02:04:50,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:04:50,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:04:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:04:50,379 INFO L87 Difference]: Start difference. First operand 2482 states and 4659 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) [2021-11-07 02:04:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:57,265 INFO L93 Difference]: Finished difference Result 6729 states and 12592 transitions. [2021-11-07 02:04:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:04:57,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 52 [2021-11-07 02:04:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:57,307 INFO L225 Difference]: With dead ends: 6729 [2021-11-07 02:04:57,307 INFO L226 Difference]: Without dead ends: 5299 [2021-11-07 02:04:57,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-11-07 02:04:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4608. [2021-11-07 02:04:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4603 states have (on average 1.8833369541603302) internal successors, (8669), 4607 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 8669 transitions. [2021-11-07 02:04:57,626 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 8669 transitions. Word has length 52 [2021-11-07 02:04:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:57,628 INFO L470 AbstractCegarLoop]: Abstraction has 4608 states and 8669 transitions. [2021-11-07 02:04:57,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) [2021-11-07 02:04:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 8669 transitions. [2021-11-07 02:04:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:04:57,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:57,634 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] [2021-11-07 02:04:57,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:57,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:57,848 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)] === [2021-11-07 02:04:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 285251702, now seen corresponding path program 1 times [2021-11-07 02:04:57,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:57,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579363321] [2021-11-07 02:04:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:57,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:57,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:57,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:04:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:58,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:58,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:58,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:58,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579363321] [2021-11-07 02:04:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579363321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:58,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:58,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:58,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960496881] [2021-11-07 02:04:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:58,722 INFO L87 Difference]: Start difference. First operand 4608 states and 8669 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:00,425 INFO L93 Difference]: Finished difference Result 8624 states and 16131 transitions. [2021-11-07 02:05:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:05:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2021-11-07 02:05:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:00,438 INFO L225 Difference]: With dead ends: 8624 [2021-11-07 02:05:00,439 INFO L226 Difference]: Without dead ends: 5060 [2021-11-07 02:05:00,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:05:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-11-07 02:05:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 4511. [2021-11-07 02:05:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4506 states have (on average 1.8681757656458056) internal successors, (8418), 4510 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 8418 transitions. [2021-11-07 02:05:00,720 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 8418 transitions. Word has length 53 [2021-11-07 02:05:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:00,720 INFO L470 AbstractCegarLoop]: Abstraction has 4511 states and 8418 transitions. [2021-11-07 02:05:00,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 8418 transitions. [2021-11-07 02:05:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:05:00,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:00,723 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] [2021-11-07 02:05:00,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:00,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:00,937 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)] === [2021-11-07 02:05:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash -679920574, now seen corresponding path program 1 times [2021-11-07 02:05:00,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:00,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322496846] [2021-11-07 02:05:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:00,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:00,940 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:00,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:05:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:01,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:05:01,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:01,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:01,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:01,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322496846] [2021-11-07 02:05:01,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322496846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:01,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:01,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:05:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477484105] [2021-11-07 02:05:01,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:05:01,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:05:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:05:01,838 INFO L87 Difference]: Start difference. First operand 4511 states and 8418 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 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) [2021-11-07 02:05:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:03,035 INFO L93 Difference]: Finished difference Result 32149 states and 60220 transitions. [2021-11-07 02:05:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:05:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 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 [2021-11-07 02:05:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:03,107 INFO L225 Difference]: With dead ends: 32149 [2021-11-07 02:05:03,107 INFO L226 Difference]: Without dead ends: 27674 [2021-11-07 02:05:03,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27674 states. [2021-11-07 02:05:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27674 to 8441. [2021-11-07 02:05:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8436 states have (on average 1.8724513987671882) internal successors, (15796), 8440 states have internal predecessors, (15796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 15796 transitions. [2021-11-07 02:05:03,682 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 15796 transitions. Word has length 54 [2021-11-07 02:05:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:03,682 INFO L470 AbstractCegarLoop]: Abstraction has 8441 states and 15796 transitions. [2021-11-07 02:05:03,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 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) [2021-11-07 02:05:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 15796 transitions. [2021-11-07 02:05:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:05:03,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:03,685 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] [2021-11-07 02:05:03,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:03,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:03,898 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)] === [2021-11-07 02:05:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1809608388, now seen corresponding path program 1 times [2021-11-07 02:05:03,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:03,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475606252] [2021-11-07 02:05:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:03,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:03,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:03,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:05:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:04,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:04,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:04,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:04,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:04,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475606252] [2021-11-07 02:05:04,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475606252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:04,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:04,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:04,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289268880] [2021-11-07 02:05:04,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:04,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:04,762 INFO L87 Difference]: Start difference. First operand 8441 states and 15796 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) [2021-11-07 02:05:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:05,595 INFO L93 Difference]: Finished difference Result 25650 states and 48038 transitions. [2021-11-07 02:05:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:05:05,596 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 [2021-11-07 02:05:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:05,640 INFO L225 Difference]: With dead ends: 25650 [2021-11-07 02:05:05,640 INFO L226 Difference]: Without dead ends: 20830 [2021-11-07 02:05:05,650 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 [2021-11-07 02:05:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20830 states. [2021-11-07 02:05:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20830 to 12992. [2021-11-07 02:05:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12992 states, 12987 states have (on average 1.872872872872873) internal successors, (24323), 12991 states have internal predecessors, (24323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12992 states to 12992 states and 24323 transitions. [2021-11-07 02:05:06,374 INFO L78 Accepts]: Start accepts. Automaton has 12992 states and 24323 transitions. Word has length 54 [2021-11-07 02:05:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:06,375 INFO L470 AbstractCegarLoop]: Abstraction has 12992 states and 24323 transitions. [2021-11-07 02:05:06,375 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) [2021-11-07 02:05:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 12992 states and 24323 transitions. [2021-11-07 02:05:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:05:06,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:06,378 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] [2021-11-07 02:05:06,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:06,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:06,592 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)] === [2021-11-07 02:05:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash -554203782, now seen corresponding path program 1 times [2021-11-07 02:05:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:06,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663061269] [2021-11-07 02:05:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:06,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:06,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:06,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:05:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:07,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:07,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:07,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663061269] [2021-11-07 02:05:07,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663061269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:07,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:07,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:05:07,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769055491] [2021-11-07 02:05:07,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:07,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:07,497 INFO L87 Difference]: Start difference. First operand 12992 states and 24323 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:10,534 INFO L93 Difference]: Finished difference Result 70612 states and 132473 transitions. [2021-11-07 02:05:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:05:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:05:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:10,644 INFO L225 Difference]: With dead ends: 70612 [2021-11-07 02:05:10,645 INFO L226 Difference]: Without dead ends: 61241 [2021-11-07 02:05:10,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:05:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61241 states. [2021-11-07 02:05:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61241 to 20872. [2021-11-07 02:05:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20872 states, 20867 states have (on average 1.8746345905017492) internal successors, (39118), 20871 states have internal predecessors, (39118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20872 states to 20872 states and 39118 transitions. [2021-11-07 02:05:12,025 INFO L78 Accepts]: Start accepts. Automaton has 20872 states and 39118 transitions. Word has length 56 [2021-11-07 02:05:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:12,025 INFO L470 AbstractCegarLoop]: Abstraction has 20872 states and 39118 transitions. [2021-11-07 02:05:12,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 20872 states and 39118 transitions. [2021-11-07 02:05:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:05:12,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:12,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:12,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:12,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:12,246 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)] === [2021-11-07 02:05:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash 775229, now seen corresponding path program 1 times [2021-11-07 02:05:12,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:12,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393778740] [2021-11-07 02:05:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:12,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:12,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:12,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:12,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:05:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:12,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:05:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:12,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:13,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:13,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393778740] [2021-11-07 02:05:13,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393778740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:13,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:13,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:13,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185407859] [2021-11-07 02:05:13,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:13,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:13,020 INFO L87 Difference]: Start difference. First operand 20872 states and 39118 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:14,441 INFO L93 Difference]: Finished difference Result 50354 states and 94057 transitions. [2021-11-07 02:05:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:05:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:14,480 INFO L225 Difference]: With dead ends: 50354 [2021-11-07 02:05:14,480 INFO L226 Difference]: Without dead ends: 31053 [2021-11-07 02:05:14,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31053 states. [2021-11-07 02:05:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31053 to 20749. [2021-11-07 02:05:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20749 states, 20744 states have (on average 1.864105283455457) internal successors, (38669), 20748 states have internal predecessors, (38669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20749 states to 20749 states and 38669 transitions. [2021-11-07 02:05:15,626 INFO L78 Accepts]: Start accepts. Automaton has 20749 states and 38669 transitions. Word has length 63 [2021-11-07 02:05:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:15,627 INFO L470 AbstractCegarLoop]: Abstraction has 20749 states and 38669 transitions. [2021-11-07 02:05:15,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 20749 states and 38669 transitions. [2021-11-07 02:05:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:05:15,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:15,630 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:15,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:15,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:15,845 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)] === [2021-11-07 02:05:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1250208026, now seen corresponding path program 1 times [2021-11-07 02:05:15,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:15,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381712809] [2021-11-07 02:05:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:15,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:15,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:15,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:15,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:05:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:05:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:16,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:16,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:16,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381712809] [2021-11-07 02:05:16,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381712809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:16,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:16,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:16,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144873672] [2021-11-07 02:05:16,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:16,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:16,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:16,682 INFO L87 Difference]: Start difference. First operand 20749 states and 38669 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:17,463 INFO L93 Difference]: Finished difference Result 38021 states and 70799 transitions. [2021-11-07 02:05:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:05:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:17,488 INFO L225 Difference]: With dead ends: 38021 [2021-11-07 02:05:17,488 INFO L226 Difference]: Without dead ends: 20764 [2021-11-07 02:05:17,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20764 states. [2021-11-07 02:05:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20764 to 20749. [2021-11-07 02:05:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20749 states, 20744 states have (on average 1.857259930582337) internal successors, (38527), 20748 states have internal predecessors, (38527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20749 states to 20749 states and 38527 transitions. [2021-11-07 02:05:18,385 INFO L78 Accepts]: Start accepts. Automaton has 20749 states and 38527 transitions. Word has length 63 [2021-11-07 02:05:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 20749 states and 38527 transitions. [2021-11-07 02:05:18,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20749 states and 38527 transitions. [2021-11-07 02:05:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:05:18,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:18,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:18,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:18,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:18,605 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)] === [2021-11-07 02:05:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1104184383, now seen corresponding path program 1 times [2021-11-07 02:05:18,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:18,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884738008] [2021-11-07 02:05:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:18,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:18,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:18,608 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:18,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:05:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:19,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:19,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:19,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884738008] [2021-11-07 02:05:19,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884738008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:19,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:19,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:05:19,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945461641] [2021-11-07 02:05:19,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:19,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:19,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:19,648 INFO L87 Difference]: Start difference. First operand 20749 states and 38527 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:22,413 INFO L93 Difference]: Finished difference Result 59670 states and 110701 transitions. [2021-11-07 02:05:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:05:22,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:05:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:22,461 INFO L225 Difference]: With dead ends: 59670 [2021-11-07 02:05:22,461 INFO L226 Difference]: Without dead ends: 42714 [2021-11-07 02:05:22,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:05:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42714 states. [2021-11-07 02:05:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42714 to 17161. [2021-11-07 02:05:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17161 states, 17156 states have (on average 1.8492072744229424) internal successors, (31725), 17160 states have internal predecessors, (31725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17161 states to 17161 states and 31725 transitions. [2021-11-07 02:05:23,255 INFO L78 Accepts]: Start accepts. Automaton has 17161 states and 31725 transitions. Word has length 64 [2021-11-07 02:05:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:23,256 INFO L470 AbstractCegarLoop]: Abstraction has 17161 states and 31725 transitions. [2021-11-07 02:05:23,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 17161 states and 31725 transitions. [2021-11-07 02:05:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:05:23,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:23,257 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:23,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:05:23,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:23,458 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)] === [2021-11-07 02:05:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash 517378369, now seen corresponding path program 1 times [2021-11-07 02:05:23,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:23,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480952397] [2021-11-07 02:05:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:23,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:23,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:23,462 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:23,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:05:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:24,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:24,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:24,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480952397] [2021-11-07 02:05:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480952397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:24,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:24,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:05:24,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930215456] [2021-11-07 02:05:24,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:24,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:24,412 INFO L87 Difference]: Start difference. First operand 17161 states and 31725 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:26,461 INFO L93 Difference]: Finished difference Result 65586 states and 121299 transitions. [2021-11-07 02:05:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:05:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:26,518 INFO L225 Difference]: With dead ends: 65586 [2021-11-07 02:05:26,518 INFO L226 Difference]: Without dead ends: 48598 [2021-11-07 02:05:26,534 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 [2021-11-07 02:05:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48598 states. [2021-11-07 02:05:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48598 to 48568. [2021-11-07 02:05:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48568 states, 48563 states have (on average 1.8443877025719169) internal successors, (89569), 48567 states have internal predecessors, (89569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48568 states to 48568 states and 89569 transitions. [2021-11-07 02:05:28,685 INFO L78 Accepts]: Start accepts. Automaton has 48568 states and 89569 transitions. Word has length 64 [2021-11-07 02:05:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:28,686 INFO L470 AbstractCegarLoop]: Abstraction has 48568 states and 89569 transitions. [2021-11-07 02:05:28,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 48568 states and 89569 transitions. [2021-11-07 02:05:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:05:28,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:28,688 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:28,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:28,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:28,888 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)] === [2021-11-07 02:05:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1627692692, now seen corresponding path program 1 times [2021-11-07 02:05:29,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:29,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307250982] [2021-11-07 02:05:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:29,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:29,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:29,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24732086-ceaf-4ecf-ae79-5c41a2b7c695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:05:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:29,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:29,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:29,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307250982] [2021-11-07 02:05:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307250982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:29,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:29,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:05:29,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058490697] [2021-11-07 02:05:29,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:29,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:29,995 INFO L87 Difference]: Start difference. First operand 48568 states and 89569 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:35,377 INFO L93 Difference]: Finished difference Result 189147 states and 348704 transitions. [2021-11-07 02:05:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:05:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:35,628 INFO L225 Difference]: With dead ends: 189147 [2021-11-07 02:05:35,629 INFO L226 Difference]: Without dead ends: 140753 [2021-11-07 02:05:35,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140753 states.