./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product26.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_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/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_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/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_6a79da80-cd51-4077-a9f6-a84a40c830ec/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 82ac70e4cab6ba17956a8bc3031bcd401426df4beecacca096cae721fbfd8afd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:37,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:37,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:37,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:37,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:37,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:37,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:37,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:37,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:37,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:37,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:37,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:37,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:37,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:37,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:37,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:37,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:37,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:37,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:37,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:37,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:37,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:37,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:37,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:37,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:37,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:37,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:37,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:37,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:37,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:37,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:37,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:37,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:37,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:37,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:37,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:37,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:37,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:37,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:37,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:37,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:37,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:40:38,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:38,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:38,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:38,021 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:38,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:38,022 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:38,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:40:38,022 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:38,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:38,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:40:38,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:40:38,023 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:38,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:40:38,028 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:40:38,028 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:40:38,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:38,029 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:38,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:40:38,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:38,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:38,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:38,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:38,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:38,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:38,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:38,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:38,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:38,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:38,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:38,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:38,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:38,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:38,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:38,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:38,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:40:38,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:40:38,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:38,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:38,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:38,036 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_6a79da80-cd51-4077-a9f6-a84a40c830ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82ac70e4cab6ba17956a8bc3031bcd401426df4beecacca096cae721fbfd8afd [2021-11-07 01:40:38,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:38,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:38,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:38,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:38,321 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:38,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product26.cil.c [2021-11-07 01:40:38,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/2c7ed02e4/47b03aa9cab64ef9aa342a0d26f9f422/FLAG4587588e3 [2021-11-07 01:40:38,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:38,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/sv-benchmarks/c/product-lines/email_spec9_product26.cil.c [2021-11-07 01:40:38,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/2c7ed02e4/47b03aa9cab64ef9aa342a0d26f9f422/FLAG4587588e3 [2021-11-07 01:40:39,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/2c7ed02e4/47b03aa9cab64ef9aa342a0d26f9f422 [2021-11-07 01:40:39,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:39,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:39,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:39,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:39,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:39,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:39" (1/1) ... [2021-11-07 01:40:39,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163559bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:39, skipping insertion in model container [2021-11-07 01:40:39,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:39" (1/1) ... [2021-11-07 01:40:39,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:39,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:39,733 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_6a79da80-cd51-4077-a9f6-a84a40c830ec/sv-benchmarks/c/product-lines/email_spec9_product26.cil.c[24949,24962] [2021-11-07 01:40:39,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:40,003 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:40:40,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39ddd7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:40, skipping insertion in model container [2021-11-07 01:40:40,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:40,005 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:40:40,007 INFO L168 Benchmark]: Toolchain (without parser) took 794.22 ms. Allocated memory is still 96.5 MB. Free memory was 52.1 MB in the beginning and 56.6 MB in the end (delta: -4.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:40:40,008 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 53.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:40:40,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 791.65 ms. Allocated memory is still 96.5 MB. Free memory was 51.9 MB in the beginning and 56.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:40:40,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 53.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 791.65 ms. Allocated memory is still 96.5 MB. Free memory was 51.9 MB in the beginning and 56.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/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_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/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_6a79da80-cd51-4077-a9f6-a84a40c830ec/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 82ac70e4cab6ba17956a8bc3031bcd401426df4beecacca096cae721fbfd8afd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:42,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:42,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:42,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:42,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:42,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:42,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:42,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:42,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:42,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:42,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:42,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:42,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:42,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:42,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:42,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:42,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:42,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:42,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:42,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:42,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:42,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:42,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:42,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:42,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:42,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:42,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:42,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:42,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:42,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:42,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:42,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:42,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:42,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:42,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:42,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:42,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:42,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:42,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:42,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:42,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:42,318 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:40:42,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:42,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:42,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:42,365 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:42,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:42,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:42,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:42,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:42,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:42,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:42,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:42,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:42,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:42,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:42,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:42,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:42,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:42,371 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:40:42,371 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:40:42,371 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:42,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:42,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:42,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:42,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:42,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:40:42,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:42,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:42,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:42,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:42,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:42,374 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:40:42,374 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:42,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:42,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:42,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:42,376 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_6a79da80-cd51-4077-a9f6-a84a40c830ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82ac70e4cab6ba17956a8bc3031bcd401426df4beecacca096cae721fbfd8afd [2021-11-07 01:40:42,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:42,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:42,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:42,786 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:42,787 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:42,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product26.cil.c [2021-11-07 01:40:42,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/f2e256948/515f1d6b1634406ea0137eaccb051309/FLAGe9fa5d380 [2021-11-07 01:40:43,620 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:43,622 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/sv-benchmarks/c/product-lines/email_spec9_product26.cil.c [2021-11-07 01:40:43,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/f2e256948/515f1d6b1634406ea0137eaccb051309/FLAGe9fa5d380 [2021-11-07 01:40:43,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/data/f2e256948/515f1d6b1634406ea0137eaccb051309 [2021-11-07 01:40:43,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:43,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:43,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:43,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:43,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:43,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:43" (1/1) ... [2021-11-07 01:40:43,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d987a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:43, skipping insertion in model container [2021-11-07 01:40:43,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:43" (1/1) ... [2021-11-07 01:40:43,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:43,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:44,424 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_6a79da80-cd51-4077-a9f6-a84a40c830ec/sv-benchmarks/c/product-lines/email_spec9_product26.cil.c[24949,24962] [2021-11-07 01:40:44,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:44,681 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:40:44,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:44,752 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_6a79da80-cd51-4077-a9f6-a84a40c830ec/sv-benchmarks/c/product-lines/email_spec9_product26.cil.c[24949,24962] [2021-11-07 01:40:44,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:44,798 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:40:44,836 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/sv-benchmarks/c/product-lines/email_spec9_product26.cil.c[24949,24962] [2021-11-07 01:40:44,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:44,906 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:40:44,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44 WrapperNode [2021-11-07 01:40:44,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:44,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:44,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:40:44,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:40:44,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:44,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:45,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:40:45,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:40:45,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:40:45,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:40:45,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:40:45,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:40:45,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:40:45,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (1/1) ... [2021-11-07 01:40:45,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:45,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:40:45,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:40:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:40:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:40:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:40:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:40:45,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:40:51,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:40:51,031 INFO L299 CfgBuilder]: Removed 725 assume(true) statements. [2021-11-07 01:40:51,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:51 BoogieIcfgContainer [2021-11-07 01:40:51,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:40:51,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:40:51,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:40:51,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:40:51,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:43" (1/3) ... [2021-11-07 01:40:51,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51242c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:51, skipping insertion in model container [2021-11-07 01:40:51,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:44" (2/3) ... [2021-11-07 01:40:51,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51242c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:51, skipping insertion in model container [2021-11-07 01:40:51,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:51" (3/3) ... [2021-11-07 01:40:51,042 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product26.cil.c [2021-11-07 01:40:51,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:40:51,048 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:40:51,143 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:40:51,153 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 01:40:51,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:40:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 1038 states, 1031 states have (on average 1.729388942774006) internal successors, (1783), 1037 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:40:51,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:51,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:51,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1931887788, now seen corresponding path program 1 times [2021-11-07 01:40:51,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:51,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079247179] [2021-11-07 01:40:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:51,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:51,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:51,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:40:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:51,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:40:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:51,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:51,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:51,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079247179] [2021-11-07 01:40:51,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079247179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:51,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:51,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:40:51,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928214819] [2021-11-07 01:40:52,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:40:52,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:40:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:40:52,021 INFO L87 Difference]: Start difference. First operand has 1038 states, 1031 states have (on average 1.729388942774006) internal successors, (1783), 1037 states have internal predecessors, (1783), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:52,181 INFO L93 Difference]: Finished difference Result 1787 states and 3036 transitions. [2021-11-07 01:40:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:40:52,182 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:40:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:52,208 INFO L225 Difference]: With dead ends: 1787 [2021-11-07 01:40:52,208 INFO L226 Difference]: Without dead ends: 886 [2021-11-07 01:40:52,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:40:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-11-07 01:40:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2021-11-07 01:40:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 880 states have (on average 1.731818181818182) internal successors, (1524), 885 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1524 transitions. [2021-11-07 01:40:52,410 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1524 transitions. Word has length 44 [2021-11-07 01:40:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:52,410 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1524 transitions. [2021-11-07 01:40:52,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1524 transitions. [2021-11-07 01:40:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:40:52,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:52,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:52,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:52,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:52,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:52,625 INFO L85 PathProgramCache]: Analyzing trace with hash 113440919, now seen corresponding path program 1 times [2021-11-07 01:40:52,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:52,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967722701] [2021-11-07 01:40:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:52,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:52,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:52,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:52,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:40:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:53,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:53,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:53,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967722701] [2021-11-07 01:40:53,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967722701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:53,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:53,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:53,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346876386] [2021-11-07 01:40:53,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:53,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:53,372 INFO L87 Difference]: Start difference. First operand 886 states and 1524 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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 01:40:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:53,574 INFO L93 Difference]: Finished difference Result 2628 states and 4524 transitions. [2021-11-07 01:40:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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 45 [2021-11-07 01:40:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:53,594 INFO L225 Difference]: With dead ends: 2628 [2021-11-07 01:40:53,594 INFO L226 Difference]: Without dead ends: 1757 [2021-11-07 01:40:53,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-11-07 01:40:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 885. [2021-11-07 01:40:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 879 states have (on average 1.7281001137656429) internal successors, (1519), 884 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1519 transitions. [2021-11-07 01:40:53,706 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1519 transitions. Word has length 45 [2021-11-07 01:40:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:53,708 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1519 transitions. [2021-11-07 01:40:53,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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 01:40:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1519 transitions. [2021-11-07 01:40:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:40:53,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:53,718 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] [2021-11-07 01:40:53,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:53,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:53,940 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:53,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1212366589, now seen corresponding path program 1 times [2021-11-07 01:40:53,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:53,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419792012] [2021-11-07 01:40:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:53,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:53,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:53,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:40:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:54,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:54,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:54,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419792012] [2021-11-07 01:40:54,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419792012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:54,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:54,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:54,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570353831] [2021-11-07 01:40:54,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:54,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:54,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:54,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:54,686 INFO L87 Difference]: Start difference. First operand 885 states and 1519 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:55,047 INFO L93 Difference]: Finished difference Result 3457 states and 5938 transitions. [2021-11-07 01:40:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:55,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:40:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:55,064 INFO L225 Difference]: With dead ends: 3457 [2021-11-07 01:40:55,064 INFO L226 Difference]: Without dead ends: 2590 [2021-11-07 01:40:55,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:40:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-11-07 01:40:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 884. [2021-11-07 01:40:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.7255125284738042) internal successors, (1515), 883 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1515 transitions. [2021-11-07 01:40:55,142 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1515 transitions. Word has length 47 [2021-11-07 01:40:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1515 transitions. [2021-11-07 01:40:55,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1515 transitions. [2021-11-07 01:40:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:40:55,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:55,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:55,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:55,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:55,359 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 300266512, now seen corresponding path program 1 times [2021-11-07 01:40:55,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:55,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276909299] [2021-11-07 01:40:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:55,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:55,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:55,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:40:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:55,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:56,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:56,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276909299] [2021-11-07 01:40:56,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276909299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:56,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:56,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:56,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092162923] [2021-11-07 01:40:56,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:56,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:56,071 INFO L87 Difference]: Start difference. First operand 884 states and 1515 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:56,188 INFO L93 Difference]: Finished difference Result 1765 states and 3027 transitions. [2021-11-07 01:40:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:56,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:40:56,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:56,195 INFO L225 Difference]: With dead ends: 1765 [2021-11-07 01:40:56,195 INFO L226 Difference]: Without dead ends: 889 [2021-11-07 01:40:56,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-11-07 01:40:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 884. [2021-11-07 01:40:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.7220956719817768) internal successors, (1512), 883 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1512 transitions. [2021-11-07 01:40:56,262 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1512 transitions. Word has length 48 [2021-11-07 01:40:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:56,262 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1512 transitions. [2021-11-07 01:40:56,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1512 transitions. [2021-11-07 01:40:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:40:56,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:56,265 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] [2021-11-07 01:40:56,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:56,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:56,485 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1328180709, now seen corresponding path program 1 times [2021-11-07 01:40:56,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:56,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447237346] [2021-11-07 01:40:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:56,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:56,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:56,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:40:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:56,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:57,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:57,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:57,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447237346] [2021-11-07 01:40:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447237346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:57,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:57,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:57,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428825159] [2021-11-07 01:40:57,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:57,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:57,247 INFO L87 Difference]: Start difference. First operand 884 states and 1512 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:57,654 INFO L93 Difference]: Finished difference Result 3444 states and 5914 transitions. [2021-11-07 01:40:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:57,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:40:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:57,672 INFO L225 Difference]: With dead ends: 3444 [2021-11-07 01:40:57,672 INFO L226 Difference]: Without dead ends: 2586 [2021-11-07 01:40:57,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:40:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-11-07 01:40:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 884. [2021-11-07 01:40:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.7186788154897494) internal successors, (1509), 883 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1509 transitions. [2021-11-07 01:40:57,772 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1509 transitions. Word has length 49 [2021-11-07 01:40:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1509 transitions. [2021-11-07 01:40:57,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1509 transitions. [2021-11-07 01:40:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:40:57,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:57,776 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 01:40:57,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:57,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:57,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -394054560, now seen corresponding path program 1 times [2021-11-07 01:40:57,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:57,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501472598] [2021-11-07 01:40:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:57,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:57,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:58,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:40:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:58,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:58,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:58,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501472598] [2021-11-07 01:40:58,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501472598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:58,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:58,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:58,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7286374] [2021-11-07 01:40:58,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:58,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:58,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:58,673 INFO L87 Difference]: Start difference. First operand 884 states and 1509 transitions. Second operand has 4 states, 4 states have (on average 13.5) 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 01:40:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:58,830 INFO L93 Difference]: Finished difference Result 2339 states and 3985 transitions. [2021-11-07 01:40:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) 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 51 [2021-11-07 01:40:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:58,841 INFO L225 Difference]: With dead ends: 2339 [2021-11-07 01:40:58,841 INFO L226 Difference]: Without dead ends: 1742 [2021-11-07 01:40:58,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-11-07 01:40:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1145. [2021-11-07 01:40:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1139 states have (on average 1.7462686567164178) internal successors, (1989), 1144 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1989 transitions. [2021-11-07 01:40:58,953 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1989 transitions. Word has length 51 [2021-11-07 01:40:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:58,953 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1989 transitions. [2021-11-07 01:40:58,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) 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 01:40:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1989 transitions. [2021-11-07 01:40:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:40:58,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:58,956 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:58,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:59,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:59,172 INFO L85 PathProgramCache]: Analyzing trace with hash 135332625, now seen corresponding path program 1 times [2021-11-07 01:40:59,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:59,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536713560] [2021-11-07 01:40:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:59,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:59,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:59,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:40:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:59,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:59,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:59,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:59,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:59,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536713560] [2021-11-07 01:40:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536713560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:59,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297128360] [2021-11-07 01:40:59,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:59,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:59,940 INFO L87 Difference]: Start difference. First operand 1145 states and 1989 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:00,124 INFO L93 Difference]: Finished difference Result 3012 states and 5226 transitions. [2021-11-07 01:41:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:41:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:00,137 INFO L225 Difference]: With dead ends: 3012 [2021-11-07 01:41:00,137 INFO L226 Difference]: Without dead ends: 1951 [2021-11-07 01:41:00,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-11-07 01:41:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1354. [2021-11-07 01:41:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1348 states have (on average 1.7596439169139466) internal successors, (2372), 1353 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 2372 transitions. [2021-11-07 01:41:00,274 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 2372 transitions. Word has length 63 [2021-11-07 01:41:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:00,275 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 2372 transitions. [2021-11-07 01:41:00,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 2372 transitions. [2021-11-07 01:41:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:41:00,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:00,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:00,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:00,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:00,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash 9772784, now seen corresponding path program 1 times [2021-11-07 01:41:00,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:00,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808554678] [2021-11-07 01:41:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:00,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:00,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:00,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:00,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:41:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:01,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:01,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:01,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808554678] [2021-11-07 01:41:01,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808554678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:01,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:01,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:01,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404165561] [2021-11-07 01:41:01,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:01,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:01,309 INFO L87 Difference]: Start difference. First operand 1354 states and 2372 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:01,527 INFO L93 Difference]: Finished difference Result 3671 states and 6440 transitions. [2021-11-07 01:41:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:41:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:01,542 INFO L225 Difference]: With dead ends: 3671 [2021-11-07 01:41:01,542 INFO L226 Difference]: Without dead ends: 2409 [2021-11-07 01:41:01,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-11-07 01:41:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1812. [2021-11-07 01:41:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1806 states have (on average 1.7796234772978958) internal successors, (3214), 1811 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3214 transitions. [2021-11-07 01:41:01,687 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3214 transitions. Word has length 64 [2021-11-07 01:41:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:01,688 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 3214 transitions. [2021-11-07 01:41:01,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3214 transitions. [2021-11-07 01:41:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:41:01,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:01,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:01,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:01,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:01,912 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash 475639615, now seen corresponding path program 1 times [2021-11-07 01:41:01,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:01,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444427578] [2021-11-07 01:41:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:01,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:01,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:01,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:41:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:02,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:02,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444427578] [2021-11-07 01:41:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444427578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:02,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:02,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:02,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774801177] [2021-11-07 01:41:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:02,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:02,746 INFO L87 Difference]: Start difference. First operand 1812 states and 3214 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:03,008 INFO L93 Difference]: Finished difference Result 5025 states and 8935 transitions. [2021-11-07 01:41:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:41:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:03,031 INFO L225 Difference]: With dead ends: 5025 [2021-11-07 01:41:03,032 INFO L226 Difference]: Without dead ends: 3313 [2021-11-07 01:41:03,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:03,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2021-11-07 01:41:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2716. [2021-11-07 01:41:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2710 states have (on average 1.799630996309963) internal successors, (4877), 2715 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 4877 transitions. [2021-11-07 01:41:03,247 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 4877 transitions. Word has length 65 [2021-11-07 01:41:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:03,248 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 4877 transitions. [2021-11-07 01:41:03,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 4877 transitions. [2021-11-07 01:41:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:41:03,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:03,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:03,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:03,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:03,467 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -731902785, now seen corresponding path program 1 times [2021-11-07 01:41:03,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:03,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278547077] [2021-11-07 01:41:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:03,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:03,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:03,470 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:03,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:41:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:04,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:04,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:04,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278547077] [2021-11-07 01:41:04,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278547077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:04,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:04,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:04,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533893718] [2021-11-07 01:41:04,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:04,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:04,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:04,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:04,275 INFO L87 Difference]: Start difference. First operand 2716 states and 4877 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:04,569 INFO L93 Difference]: Finished difference Result 7473 states and 13443 transitions. [2021-11-07 01:41:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:41:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:04,625 INFO L225 Difference]: With dead ends: 7473 [2021-11-07 01:41:04,625 INFO L226 Difference]: Without dead ends: 4891 [2021-11-07 01:41:04,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-11-07 01:41:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 4294. [2021-11-07 01:41:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4288 states have (on average 1.8138992537313432) internal successors, (7778), 4293 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 7778 transitions. [2021-11-07 01:41:04,956 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 7778 transitions. Word has length 66 [2021-11-07 01:41:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:04,956 INFO L470 AbstractCegarLoop]: Abstraction has 4294 states and 7778 transitions. [2021-11-07 01:41:04,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 7778 transitions. [2021-11-07 01:41:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:41:04,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:04,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:04,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:05,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:05,185 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 676905328, now seen corresponding path program 1 times [2021-11-07 01:41:05,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:05,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232527677] [2021-11-07 01:41:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:05,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:05,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:41:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:05,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:05,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:05,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:06,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:06,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232527677] [2021-11-07 01:41:06,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232527677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:06,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:06,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:06,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640734871] [2021-11-07 01:41:06,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:06,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:06,133 INFO L87 Difference]: Start difference. First operand 4294 states and 7778 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:06,556 INFO L93 Difference]: Finished difference Result 11923 states and 21629 transitions. [2021-11-07 01:41:06,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:06,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:41:06,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:06,576 INFO L225 Difference]: With dead ends: 11923 [2021-11-07 01:41:06,577 INFO L226 Difference]: Without dead ends: 7797 [2021-11-07 01:41:06,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2021-11-07 01:41:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7200. [2021-11-07 01:41:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7194 states have (on average 1.8230469835974423) internal successors, (13115), 7199 states have internal predecessors, (13115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 13115 transitions. [2021-11-07 01:41:07,149 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 13115 transitions. Word has length 67 [2021-11-07 01:41:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:07,150 INFO L470 AbstractCegarLoop]: Abstraction has 7200 states and 13115 transitions. [2021-11-07 01:41:07,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 13115 transitions. [2021-11-07 01:41:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:41:07,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:07,162 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:07,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:07,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:07,376 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1278722608, now seen corresponding path program 1 times [2021-11-07 01:41:07,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:07,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355366765] [2021-11-07 01:41:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:07,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:07,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:07,379 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:07,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:41:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:07,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:07,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:08,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:08,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:08,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355366765] [2021-11-07 01:41:08,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355366765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:08,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:08,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:08,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737366845] [2021-11-07 01:41:08,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:08,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:08,297 INFO L87 Difference]: Start difference. First operand 7200 states and 13115 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:09,056 INFO L93 Difference]: Finished difference Result 20967 states and 38251 transitions. [2021-11-07 01:41:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:09,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:41:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:09,091 INFO L225 Difference]: With dead ends: 20967 [2021-11-07 01:41:09,091 INFO L226 Difference]: Without dead ends: 13943 [2021-11-07 01:41:09,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13943 states. [2021-11-07 01:41:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13943 to 13346. [2021-11-07 01:41:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13346 states, 13340 states have (on average 1.8287856071964017) internal successors, (24396), 13345 states have internal predecessors, (24396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13346 states to 13346 states and 24396 transitions. [2021-11-07 01:41:09,943 INFO L78 Accepts]: Start accepts. Automaton has 13346 states and 24396 transitions. Word has length 68 [2021-11-07 01:41:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:09,943 INFO L470 AbstractCegarLoop]: Abstraction has 13346 states and 24396 transitions. [2021-11-07 01:41:09,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 13346 states and 24396 transitions. [2021-11-07 01:41:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:41:09,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:09,952 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:09,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:41:10,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:10,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 584243968, now seen corresponding path program 1 times [2021-11-07 01:41:10,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:10,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342554074] [2021-11-07 01:41:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:10,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:10,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:10,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:10,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:41:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:10,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:11,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:11,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342554074] [2021-11-07 01:41:11,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342554074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:11,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:11,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:11,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434288815] [2021-11-07 01:41:11,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:11,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:11,149 INFO L87 Difference]: Start difference. First operand 13346 states and 24396 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:14,362 INFO L93 Difference]: Finished difference Result 33135 states and 60553 transitions. [2021-11-07 01:41:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:41:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:14,415 INFO L225 Difference]: With dead ends: 33135 [2021-11-07 01:41:14,415 INFO L226 Difference]: Without dead ends: 20086 [2021-11-07 01:41:14,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:41:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20086 states. [2021-11-07 01:41:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20086 to 13313. [2021-11-07 01:41:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13313 states, 13307 states have (on average 1.8234012174043737) internal successors, (24264), 13312 states have internal predecessors, (24264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13313 states to 13313 states and 24264 transitions. [2021-11-07 01:41:15,450 INFO L78 Accepts]: Start accepts. Automaton has 13313 states and 24264 transitions. Word has length 69 [2021-11-07 01:41:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:15,450 INFO L470 AbstractCegarLoop]: Abstraction has 13313 states and 24264 transitions. [2021-11-07 01:41:15,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13313 states and 24264 transitions. [2021-11-07 01:41:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:41:15,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:15,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:15,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:15,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:15,672 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1187975263, now seen corresponding path program 1 times [2021-11-07 01:41:15,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:15,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114193963] [2021-11-07 01:41:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:15,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:15,675 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:15,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:41:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:16,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:16,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:16,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114193963] [2021-11-07 01:41:16,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114193963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:16,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:16,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:16,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474163335] [2021-11-07 01:41:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:16,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:16,600 INFO L87 Difference]: Start difference. First operand 13313 states and 24264 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:17,543 INFO L93 Difference]: Finished difference Result 39138 states and 71405 transitions. [2021-11-07 01:41:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:41:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:17,593 INFO L225 Difference]: With dead ends: 39138 [2021-11-07 01:41:17,593 INFO L226 Difference]: Without dead ends: 26008 [2021-11-07 01:41:17,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26008 states. [2021-11-07 01:41:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26008 to 25411. [2021-11-07 01:41:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25411 states, 25405 states have (on average 1.8255067900019681) internal successors, (46377), 25410 states have internal predecessors, (46377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25411 states to 25411 states and 46377 transitions. [2021-11-07 01:41:19,130 INFO L78 Accepts]: Start accepts. Automaton has 25411 states and 46377 transitions. Word has length 69 [2021-11-07 01:41:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:19,131 INFO L470 AbstractCegarLoop]: Abstraction has 25411 states and 46377 transitions. [2021-11-07 01:41:19,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25411 states and 46377 transitions. [2021-11-07 01:41:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:41:19,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:19,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:19,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:19,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:19,368 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 34652959, now seen corresponding path program 1 times [2021-11-07 01:41:19,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:19,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678889080] [2021-11-07 01:41:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:19,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:19,371 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:19,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:41:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:20,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:20,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:20,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678889080] [2021-11-07 01:41:20,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678889080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:20,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:20,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:20,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749599409] [2021-11-07 01:41:20,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:20,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:20,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:20,536 INFO L87 Difference]: Start difference. First operand 25411 states and 46377 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:22,078 INFO L93 Difference]: Finished difference Result 70071 states and 127480 transitions. [2021-11-07 01:41:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:41:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:22,151 INFO L225 Difference]: With dead ends: 70071 [2021-11-07 01:41:22,151 INFO L226 Difference]: Without dead ends: 44890 [2021-11-07 01:41:22,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44890 states. [2021-11-07 01:41:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44890 to 44293. [2021-11-07 01:41:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44293 states, 44287 states have (on average 1.8145731252963624) internal successors, (80362), 44292 states have internal predecessors, (80362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44293 states to 44293 states and 80362 transitions. [2021-11-07 01:41:24,792 INFO L78 Accepts]: Start accepts. Automaton has 44293 states and 80362 transitions. Word has length 70 [2021-11-07 01:41:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:24,793 INFO L470 AbstractCegarLoop]: Abstraction has 44293 states and 80362 transitions. [2021-11-07 01:41:24,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44293 states and 80362 transitions. [2021-11-07 01:41:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:41:24,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:24,803 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:24,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:25,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:25,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 91591622, now seen corresponding path program 1 times [2021-11-07 01:41:25,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:25,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638512160] [2021-11-07 01:41:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:25,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:25,019 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:25,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:41:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:41:25,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:41:26,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:26,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638512160] [2021-11-07 01:41:26,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638512160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:26,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:26,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:26,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826216303] [2021-11-07 01:41:26,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:26,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:26,085 INFO L87 Difference]: Start difference. First operand 44293 states and 80362 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:33,743 INFO L93 Difference]: Finished difference Result 172440 states and 312749 transitions. [2021-11-07 01:41:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:41:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:41:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:34,085 INFO L225 Difference]: With dead ends: 172440 [2021-11-07 01:41:34,085 INFO L226 Difference]: Without dead ends: 128443 [2021-11-07 01:41:34,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128443 states. [2021-11-07 01:41:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128443 to 44035. [2021-11-07 01:41:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44035 states, 44029 states have (on average 1.8017670171932136) internal successors, (79330), 44034 states have internal predecessors, (79330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44035 states to 44035 states and 79330 transitions. [2021-11-07 01:41:37,077 INFO L78 Accepts]: Start accepts. Automaton has 44035 states and 79330 transitions. Word has length 71 [2021-11-07 01:41:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:37,077 INFO L470 AbstractCegarLoop]: Abstraction has 44035 states and 79330 transitions. [2021-11-07 01:41:37,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 44035 states and 79330 transitions. [2021-11-07 01:41:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:41:37,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:37,084 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:37,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:37,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:37,294 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -235771804, now seen corresponding path program 1 times [2021-11-07 01:41:37,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:37,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352539166] [2021-11-07 01:41:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:37,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:37,296 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:37,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:41:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:38,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:38,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:38,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:38,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352539166] [2021-11-07 01:41:38,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352539166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:38,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:38,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:41:38,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177081876] [2021-11-07 01:41:38,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:38,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:38,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:38,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:38,458 INFO L87 Difference]: Start difference. First operand 44035 states and 79330 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:40,344 INFO L93 Difference]: Finished difference Result 88365 states and 159148 transitions. [2021-11-07 01:41:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:40,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:41:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:40,404 INFO L225 Difference]: With dead ends: 88365 [2021-11-07 01:41:40,405 INFO L226 Difference]: Without dead ends: 44632 [2021-11-07 01:41:40,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44632 states. [2021-11-07 01:41:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44632 to 44035. [2021-11-07 01:41:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44035 states, 44029 states have (on average 1.7988598423766153) internal successors, (79202), 44034 states have internal predecessors, (79202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44035 states to 44035 states and 79202 transitions. [2021-11-07 01:41:42,711 INFO L78 Accepts]: Start accepts. Automaton has 44035 states and 79202 transitions. Word has length 71 [2021-11-07 01:41:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:42,711 INFO L470 AbstractCegarLoop]: Abstraction has 44035 states and 79202 transitions. [2021-11-07 01:41:42,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 44035 states and 79202 transitions. [2021-11-07 01:41:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:41:42,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:42,717 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:42,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:42,920 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2126228655, now seen corresponding path program 1 times [2021-11-07 01:41:42,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:42,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414288329] [2021-11-07 01:41:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:42,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:42,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:42,921 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:42,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a79da80-cd51-4077-a9f6-a84a40c830ec/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:41:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:43,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:43,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:43,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414288329] [2021-11-07 01:41:43,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414288329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:43,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:43,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:43,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245347785] [2021-11-07 01:41:43,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:43,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:43,930 INFO L87 Difference]: Start difference. First operand 44035 states and 79202 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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)