./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:51:12,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:51:12,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:51:12,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:51:12,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:51:12,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:51:12,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:51:12,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:51:12,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:51:12,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:51:12,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:51:12,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:51:12,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:51:12,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:51:12,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:51:12,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:51:12,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:51:12,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:51:12,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:51:12,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:51:12,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:51:12,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:51:12,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:51:12,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:51:12,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:51:12,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:51:12,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:51:12,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:51:12,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:51:12,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:51:12,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:51:12,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:51:12,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:51:12,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:51:12,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:51:12,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:51:12,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:51:12,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:51:12,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:51:12,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:51:12,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:51:12,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:51:13,023 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:51:13,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:51:13,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:51:13,025 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:51:13,025 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:51:13,025 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:51:13,025 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:51:13,025 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:51:13,026 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:51:13,026 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:51:13,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:51:13,026 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:51:13,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:51:13,027 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:51:13,027 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:51:13,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:51:13,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:51:13,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:51:13,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:51:13,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:51:13,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:51:13,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:51:13,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:51:13,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:51:13,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:51:13,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:51:13,030 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:51:13,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:51:13,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:51:13,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:51:13,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:51:13,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:51:13,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:51:13,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:51:13,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:51:13,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:51:13,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:51:13,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:51:13,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:51:13,032 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-07 01:51:13,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:51:13,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:51:13,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:51:13,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:51:13,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:51:13,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-07 01:51:13,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/15654c224/392f324fec56436d8f95ea078c014cee/FLAG654da590f [2021-11-07 01:51:13,982 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:51:13,982 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-07 01:51:14,023 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/15654c224/392f324fec56436d8f95ea078c014cee/FLAG654da590f [2021-11-07 01:51:14,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/15654c224/392f324fec56436d8f95ea078c014cee [2021-11-07 01:51:14,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:51:14,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:51:14,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:14,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:51:14,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:51:14,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:14" (1/1) ... [2021-11-07 01:51:14,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74468410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:14, skipping insertion in model container [2021-11-07 01:51:14,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:14" (1/1) ... [2021-11-07 01:51:14,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:51:14,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:51:14,786 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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-07 01:51:14,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:14,810 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 01:51:14,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5139869e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:14, skipping insertion in model container [2021-11-07 01:51:14,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:14,811 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:51:14,814 INFO L168 Benchmark]: Toolchain (without parser) took 560.52 ms. Allocated memory is still 107.0 MB. Free memory was 71.3 MB in the beginning and 73.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:14,814 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:51:14,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.01 ms. Allocated memory is still 107.0 MB. Free memory was 71.1 MB in the beginning and 73.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:14,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 558.01 ms. Allocated memory is still 107.0 MB. Free memory was 71.1 MB in the beginning and 73.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:51:17,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:51:17,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:51:17,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:51:17,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:51:17,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:51:17,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:51:17,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:51:17,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:51:17,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:51:17,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:51:17,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:51:17,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:51:17,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:51:17,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:51:17,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:51:17,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:51:17,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:51:17,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:51:17,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:51:17,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:51:17,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:51:17,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:51:17,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:51:17,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:51:17,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:51:17,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:51:17,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:51:17,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:51:17,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:51:17,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:51:17,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:51:17,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:51:17,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:51:17,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:51:17,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:51:17,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:51:17,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:51:17,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:51:17,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:51:17,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:51:17,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:51:17,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:51:17,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:51:17,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:51:17,266 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:51:17,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:51:17,266 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:51:17,267 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:51:17,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:51:17,267 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:51:17,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:51:17,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:51:17,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:51:17,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:51:17,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:51:17,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:51:17,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:51:17,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:51:17,271 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:51:17,272 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:51:17,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:51:17,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:51:17,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:51:17,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:51:17,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:51:17,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:51:17,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:51:17,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:51:17,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:51:17,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:51:17,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:51:17,275 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:51:17,275 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:17,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:51:17,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:51:17,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:51:17,276 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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-07 01:51:17,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:51:17,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:51:17,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:51:17,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:51:17,711 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:51:17,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-07 01:51:17,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/ce4f450ba/4f41d32839984136abd8e223cc9cc899/FLAGe92f6032a [2021-11-07 01:51:18,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:51:18,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-07 01:51:18,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/ce4f450ba/4f41d32839984136abd8e223cc9cc899/FLAGe92f6032a [2021-11-07 01:51:18,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/data/ce4f450ba/4f41d32839984136abd8e223cc9cc899 [2021-11-07 01:51:18,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:51:18,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:51:18,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:18,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:51:18,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:51:18,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:18" (1/1) ... [2021-11-07 01:51:18,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c54ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:18, skipping insertion in model container [2021-11-07 01:51:18,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:18" (1/1) ... [2021-11-07 01:51:18,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:51:18,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:51:19,312 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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-07 01:51:19,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:19,339 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:51:19,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:51:19,539 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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-07 01:51:19,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:19,563 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:51:19,716 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_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-07 01:51:19,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:19,739 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:51:19,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19 WrapperNode [2021-11-07 01:51:19,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:19,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:51:19,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:51:19,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:51:19,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:19,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:19,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:51:19,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:51:19,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:51:19,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:51:19,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:19,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:19,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:19,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:19,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:20,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:20,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:20,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:51:20,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:51:20,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:51:20,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:51:20,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (1/1) ... [2021-11-07 01:51:20,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:51:20,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:51:20,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:51:20,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:51:20,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:51:20,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:51:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:51:20,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:51:20,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:51:20,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:51:20,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:51:20,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:51:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:51:20,356 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:51:29,905 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:51:29,905 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:51:29,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:51:29,914 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:51:29,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:51:29 BoogieIcfgContainer [2021-11-07 01:51:29,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:51:29,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:51:29,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:51:29,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:51:29,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:51:18" (1/3) ... [2021-11-07 01:51:29,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3c1cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:51:29, skipping insertion in model container [2021-11-07 01:51:29,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:19" (2/3) ... [2021-11-07 01:51:29,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3c1cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:51:29, skipping insertion in model container [2021-11-07 01:51:29,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:51:29" (3/3) ... [2021-11-07 01:51:29,924 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-11-07 01:51:29,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:51:29,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:51:29,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:51:29,982 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 01:51:29,983 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:51:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 01:51:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:51:30,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:30,010 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] [2021-11-07 01:51:30,011 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-11-07 01:51:30,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:30,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309972567] [2021-11-07 01:51:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:30,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:30,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:51:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:51:30,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:51:30,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:51:30,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:30,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:51:30,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:30,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:51:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-07 01:51:31,239 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:51:31,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-07 01:51:31,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:31,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:51:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:51:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-07 01:51:31,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:51:31,588 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:51:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:51:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:31,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:51:31,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 01:51:31,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 01:51:31,815 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 01:51:31,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:32,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:51:32,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:51:32,204 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:51:32,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:51:32,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:51:32,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:51:32,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:51:32,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:32,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:51:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:32,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:32,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309972567] [2021-11-07 01:51:32,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309972567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:32,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:32,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:51:32,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398714620] [2021-11-07 01:51:32,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:51:32,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:51:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:51:32,918 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:54,225 INFO L93 Difference]: Finished difference Result 295 states and 495 transitions. [2021-11-07 01:51:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:51:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 01:51:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:54,238 INFO L225 Difference]: With dead ends: 295 [2021-11-07 01:51:54,238 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 01:51:54,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:51:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 01:51:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-07 01:51:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.5263157894736843) internal successors, (203), 133 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 01:51:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2021-11-07 01:51:54,282 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 43 [2021-11-07 01:51:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:54,283 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2021-11-07 01:51:54,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2021-11-07 01:51:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:51:54,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:54,286 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] [2021-11-07 01:51:54,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:54,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:54,494 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2115802661, now seen corresponding path program 1 times [2021-11-07 01:51:54,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:54,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96186689] [2021-11-07 01:51:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:54,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:54,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:54,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:54,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:51:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:51:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:55,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:55,491 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:51:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:51:58,816 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:51:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:52:06,677 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:52:06,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:52:06,789 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 01:52:06,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:15,082 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 01:52:15,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:15,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96186689] [2021-11-07 01:52:15,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96186689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:15,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:15,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 01:52:15,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267096326] [2021-11-07 01:52:15,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:15,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-07 01:52:15,085 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:52:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:42,882 INFO L93 Difference]: Finished difference Result 286 states and 434 transitions. [2021-11-07 01:52:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:52:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-11-07 01:52:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:42,885 INFO L225 Difference]: With dead ends: 286 [2021-11-07 01:52:42,885 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 01:52:42,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-07 01:52:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 01:52:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-11-07 01:52:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 01:52:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-11-07 01:52:42,900 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 43 [2021-11-07 01:52:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-11-07 01:52:42,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:52:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-11-07 01:52:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:52:42,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:42,904 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:52:42,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:43,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:43,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:52:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash -964647941, now seen corresponding path program 1 times [2021-11-07 01:52:43,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:43,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051626431] [2021-11-07 01:52:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:43,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:43,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:43,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:52:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:43,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:43,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:43,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:43,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:44,046 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:52:44,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:52:47,227 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:52:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:52:54,574 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:52:54,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:52:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:54,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:55,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:55,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051626431] [2021-11-07 01:52:55,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051626431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:55,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:55,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:52:55,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469054242] [2021-11-07 01:52:55,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:52:55,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:52:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:52:55,032 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 01:53:41,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:41,401 INFO L93 Difference]: Finished difference Result 417 states and 637 transitions. [2021-11-07 01:53:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:41,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 56 [2021-11-07 01:53:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:41,406 INFO L225 Difference]: With dead ends: 417 [2021-11-07 01:53:41,406 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 01:53:41,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:53:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 01:53:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 174. [2021-11-07 01:53:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5491329479768785) internal successors, (268), 173 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 01:53:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 268 transitions. [2021-11-07 01:53:41,429 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 268 transitions. Word has length 56 [2021-11-07 01:53:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:41,430 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 268 transitions. [2021-11-07 01:53:41,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 01:53:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 268 transitions. [2021-11-07 01:53:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:53:41,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:41,433 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:53:41,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:53:41,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:41,650 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash 573692089, now seen corresponding path program 1 times [2021-11-07 01:53:41,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:41,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686467163] [2021-11-07 01:53:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:41,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:41,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:41,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:53:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:42,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:42,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:42,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:53:42,827 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:53:42,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:53:46,211 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:53:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:53:53,821 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:53:53,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:53:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:53,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:54,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:54,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686467163] [2021-11-07 01:53:54,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686467163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:54,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:54,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:53:54,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608527716] [2021-11-07 01:53:54,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:54,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:54,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:54,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:53:54,345 INFO L87 Difference]: Start difference. First operand 174 states and 268 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 01:54:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:40,237 INFO L93 Difference]: Finished difference Result 449 states and 687 transitions. [2021-11-07 01:54:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 56 [2021-11-07 01:54:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:40,240 INFO L225 Difference]: With dead ends: 449 [2021-11-07 01:54:40,240 INFO L226 Difference]: Without dead ends: 309 [2021-11-07 01:54:40,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:54:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-07 01:54:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 161. [2021-11-07 01:54:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.54375) internal successors, (247), 160 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 01:54:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2021-11-07 01:54:40,254 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 56 [2021-11-07 01:54:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:40,254 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2021-11-07 01:54:40,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 01:54:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2021-11-07 01:54:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:54:40,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:40,258 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:54:40,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:40,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:40,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash 370114448, now seen corresponding path program 1 times [2021-11-07 01:54:40,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:40,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790156044] [2021-11-07 01:54:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:40,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:40,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:40,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:54:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:41,547 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:54:41,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:54:44,659 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:54:44,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:54:51,398 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:54:51,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:54:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:51,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:51,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:51,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790156044] [2021-11-07 01:54:51,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790156044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:51,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:51,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:54:51,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404738991] [2021-11-07 01:54:51,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:54:51,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:54:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:54:51,786 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 01:55:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:28,699 INFO L93 Difference]: Finished difference Result 431 states and 660 transitions. [2021-11-07 01:55:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 57 [2021-11-07 01:55:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:28,703 INFO L225 Difference]: With dead ends: 431 [2021-11-07 01:55:28,703 INFO L226 Difference]: Without dead ends: 291 [2021-11-07 01:55:28,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:55:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-07 01:55:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 172. [2021-11-07 01:55:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 171 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 01:55:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 261 transitions. [2021-11-07 01:55:28,715 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 261 transitions. Word has length 57 [2021-11-07 01:55:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:28,715 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 261 transitions. [2021-11-07 01:55:28,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 01:55:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 261 transitions. [2021-11-07 01:55:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:55:28,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:28,718 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:55:28,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:28,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:28,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:55:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash -633507548, now seen corresponding path program 1 times [2021-11-07 01:55:28,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:28,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45385502] [2021-11-07 01:55:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:28,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:28,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:28,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:28,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:55:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:30,084 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:55:30,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:55:33,299 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:55:33,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:55:40,078 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:55:40,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:55:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:40,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:40,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:40,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45385502] [2021-11-07 01:55:40,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45385502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:40,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:40,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:55:40,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618393179] [2021-11-07 01:55:40,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:55:40,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:55:40,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:55:40,461 INFO L87 Difference]: Start difference. First operand 172 states and 261 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 01:56:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:21,843 INFO L93 Difference]: Finished difference Result 462 states and 702 transitions. [2021-11-07 01:56:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 57 [2021-11-07 01:56:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:21,847 INFO L225 Difference]: With dead ends: 462 [2021-11-07 01:56:21,847 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 01:56:21,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:56:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 01:56:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 215. [2021-11-07 01:56:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.5046728971962617) internal successors, (322), 214 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 01:56:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 322 transitions. [2021-11-07 01:56:21,859 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 322 transitions. Word has length 57 [2021-11-07 01:56:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:21,859 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 322 transitions. [2021-11-07 01:56:21,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 01:56:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 322 transitions. [2021-11-07 01:56:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:56:21,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:21,862 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:56:21,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:22,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:22,074 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:56:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1501432389, now seen corresponding path program 1 times [2021-11-07 01:56:22,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:22,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884163535] [2021-11-07 01:56:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:22,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:22,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:22,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:56:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:22,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:22,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:22,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:22,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:23,111 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:56:23,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:56:26,371 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:56:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:56:33,885 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:56:33,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:56:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:34,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:34,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:34,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884163535] [2021-11-07 01:56:34,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884163535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:34,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:34,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:56:34,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508390641] [2021-11-07 01:56:34,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:56:34,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:56:34,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:56:34,335 INFO L87 Difference]: Start difference. First operand 215 states and 322 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:13,590 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2021-11-07 01:57:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:13,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:57:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:13,593 INFO L225 Difference]: With dead ends: 528 [2021-11-07 01:57:13,593 INFO L226 Difference]: Without dead ends: 343 [2021-11-07 01:57:13,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:57:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-07 01:57:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2021-11-07 01:57:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5043103448275863) internal successors, (349), 232 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 01:57:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 349 transitions. [2021-11-07 01:57:13,605 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 349 transitions. Word has length 57 [2021-11-07 01:57:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:13,605 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 349 transitions. [2021-11-07 01:57:13,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 349 transitions. [2021-11-07 01:57:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:57:13,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:13,607 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:57:13,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:13,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:13,822 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash -766087557, now seen corresponding path program 1 times [2021-11-07 01:57:13,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:13,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440810958] [2021-11-07 01:57:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:13,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:13,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:13,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:57:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:14,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:14,953 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:57:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:57:18,164 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:57:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:57:25,441 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:57:25,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:57:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:25,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:25,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:25,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440810958] [2021-11-07 01:57:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440810958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:25,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:25,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:57:25,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481776800] [2021-11-07 01:57:25,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:57:25,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:57:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:57:25,842 INFO L87 Difference]: Start difference. First operand 233 states and 349 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:00,148 INFO L93 Difference]: Finished difference Result 545 states and 823 transitions. [2021-11-07 01:58:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:58:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:00,152 INFO L225 Difference]: With dead ends: 545 [2021-11-07 01:58:00,152 INFO L226 Difference]: Without dead ends: 342 [2021-11-07 01:58:00,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:58:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-07 01:58:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 232. [2021-11-07 01:58:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.4935064935064934) internal successors, (345), 231 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 01:58:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 345 transitions. [2021-11-07 01:58:00,164 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 345 transitions. Word has length 57 [2021-11-07 01:58:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:00,165 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 345 transitions. [2021-11-07 01:58:00,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 345 transitions. [2021-11-07 01:58:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:58:00,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:00,166 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:00,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:00,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:00,382 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash -189606874, now seen corresponding path program 1 times [2021-11-07 01:58:00,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:00,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145783224] [2021-11-07 01:58:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:00,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:00,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:58:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:58:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:01,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:01,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:01,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145783224] [2021-11-07 01:58:01,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145783224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:01,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:01,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:01,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529495321] [2021-11-07 01:58:01,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:01,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:01,385 INFO L87 Difference]: Start difference. First operand 232 states and 345 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:01,436 INFO L93 Difference]: Finished difference Result 835 states and 1253 transitions. [2021-11-07 01:58:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:58:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:01,441 INFO L225 Difference]: With dead ends: 835 [2021-11-07 01:58:01,441 INFO L226 Difference]: Without dead ends: 633 [2021-11-07 01:58:01,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 01:58:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-07 01:58:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2021-11-07 01:58:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.4849884526558892) internal successors, (643), 433 states have internal predecessors, (643), 0 states have call successors, (0), 0 states 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 01:58:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 643 transitions. [2021-11-07 01:58:01,470 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 643 transitions. Word has length 57 [2021-11-07 01:58:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:01,470 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 643 transitions. [2021-11-07 01:58:01,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 643 transitions. [2021-11-07 01:58:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:58:01,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:01,472 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:58:01,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:01,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:01,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1087000152, now seen corresponding path program 1 times [2021-11-07 01:58:01,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:01,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237085961] [2021-11-07 01:58:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:01,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:01,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:01,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:58:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:02,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:02,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:02,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:02,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:58:03,120 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:58:03,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:58:06,464 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:58:06,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:58:13,259 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:58:13,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:58:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:13,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:13,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:13,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237085961] [2021-11-07 01:58:13,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237085961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:13,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:13,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:58:13,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618551694] [2021-11-07 01:58:13,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:58:13,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:58:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:58:13,679 INFO L87 Difference]: Start difference. First operand 434 states and 643 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 01:58:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:43,652 INFO L93 Difference]: Finished difference Result 1056 states and 1573 transitions. [2021-11-07 01:58:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:43,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 57 [2021-11-07 01:58:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:43,658 INFO L225 Difference]: With dead ends: 1056 [2021-11-07 01:58:43,658 INFO L226 Difference]: Without dead ends: 659 [2021-11-07 01:58:43,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:58:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-07 01:58:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 430. [2021-11-07 01:58:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.4825174825174825) internal successors, (636), 429 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 01:58:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 636 transitions. [2021-11-07 01:58:43,690 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 636 transitions. Word has length 57 [2021-11-07 01:58:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:43,690 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 636 transitions. [2021-11-07 01:58:43,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 01:58:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 636 transitions. [2021-11-07 01:58:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:58:43,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:43,692 INFO L513 BasicCegarLoop]: trace histogram [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 01:58:43,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:43,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:43,906 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash 471915876, now seen corresponding path program 1 times [2021-11-07 01:58:43,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:43,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232387281] [2021-11-07 01:58:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:43,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:43,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:43,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:58:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:44,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:58:45,227 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:58:45,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:58:48,475 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:58:48,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:58:55,406 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:58:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:58:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:55,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:55,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:55,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232387281] [2021-11-07 01:58:55,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232387281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:55,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:55,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:58:55,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839901693] [2021-11-07 01:58:55,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:58:55,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:58:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:58:55,858 INFO L87 Difference]: Start difference. First operand 430 states and 636 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 01:59:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:33,026 INFO L93 Difference]: Finished difference Result 1052 states and 1564 transitions. [2021-11-07 01:59:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:59:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 58 [2021-11-07 01:59:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:33,031 INFO L225 Difference]: With dead ends: 1052 [2021-11-07 01:59:33,031 INFO L226 Difference]: Without dead ends: 659 [2021-11-07 01:59:33,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:59:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-07 01:59:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 455. [2021-11-07 01:59:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.460352422907489) internal successors, (663), 454 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 01:59:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 663 transitions. [2021-11-07 01:59:33,061 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 663 transitions. Word has length 58 [2021-11-07 01:59:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:33,061 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 663 transitions. [2021-11-07 01:59:33,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 01:59:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 663 transitions. [2021-11-07 01:59:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:59:33,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:33,063 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:59:33,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:33,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:33,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash 466535849, now seen corresponding path program 1 times [2021-11-07 01:59:33,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:33,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416001382] [2021-11-07 01:59:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:33,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:33,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:33,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:59:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:34,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:34,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:59:34,719 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:59:34,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:59:38,123 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:59:38,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:59:45,128 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:59:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:59:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:45,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:45,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:45,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416001382] [2021-11-07 01:59:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416001382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:45,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:45,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:59:45,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047820146] [2021-11-07 01:59:45,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:59:45,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:59:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:59:45,551 INFO L87 Difference]: Start difference. First operand 455 states and 663 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:19,467 INFO L93 Difference]: Finished difference Result 1077 states and 1583 transitions. [2021-11-07 02:00:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:00:19,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:00:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:19,471 INFO L225 Difference]: With dead ends: 1077 [2021-11-07 02:00:19,471 INFO L226 Difference]: Without dead ends: 659 [2021-11-07 02:00:19,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:00:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-07 02:00:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 457. [2021-11-07 02:00:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.4407894736842106) internal successors, (657), 456 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 657 transitions. [2021-11-07 02:00:19,497 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 657 transitions. Word has length 59 [2021-11-07 02:00:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 657 transitions. [2021-11-07 02:00:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 657 transitions. [2021-11-07 02:00:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:00:19,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:19,499 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:00:19,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:19,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:19,717 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash 385987209, now seen corresponding path program 1 times [2021-11-07 02:00:19,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:19,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039537870] [2021-11-07 02:00:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:19,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:19,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:19,719 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:19,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:00:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:00:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:00:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:00:20,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:00:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:00:20,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:00:20,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:00:21,241 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:00:21,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 02:00:24,597 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:00:24,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 02:00:31,680 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:00:31,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 02:00:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:31,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:32,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:32,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039537870] [2021-11-07 02:00:32,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039537870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:32,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:32,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:00:32,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392204079] [2021-11-07 02:00:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:00:32,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:00:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:00:32,139 INFO L87 Difference]: Start difference. First operand 457 states and 657 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:12,292 INFO L93 Difference]: Finished difference Result 1071 states and 1566 transitions. [2021-11-07 02:01:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:01:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:12,297 INFO L225 Difference]: With dead ends: 1071 [2021-11-07 02:01:12,297 INFO L226 Difference]: Without dead ends: 651 [2021-11-07 02:01:12,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:01:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-07 02:01:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 451. [2021-11-07 02:01:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.4288888888888889) internal successors, (643), 450 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 643 transitions. [2021-11-07 02:01:12,328 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 643 transitions. Word has length 60 [2021-11-07 02:01:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:12,328 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 643 transitions. [2021-11-07 02:01:12,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 643 transitions. [2021-11-07 02:01:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:01:12,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:12,330 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 02:01:12,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:12,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:12,550 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1516075505, now seen corresponding path program 1 times [2021-11-07 02:01:12,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:12,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242741661] [2021-11-07 02:01:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:12,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:12,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:12,553 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:12,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:01:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:01:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:13,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:13,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:13,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:14,060 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 02:01:14,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 02:01:15,184 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:01:15,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 02:01:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:15,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:15,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242741661] [2021-11-07 02:01:15,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242741661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:15,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:15,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:01:15,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177933626] [2021-11-07 02:01:15,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:01:15,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:01:15,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:01:15,514 INFO L87 Difference]: Start difference. First operand 451 states and 643 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:33,818 INFO L93 Difference]: Finished difference Result 922 states and 1323 transitions. [2021-11-07 02:01:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:01:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:33,826 INFO L225 Difference]: With dead ends: 922 [2021-11-07 02:01:33,826 INFO L226 Difference]: Without dead ends: 508 [2021-11-07 02:01:33,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-07 02:01:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2021-11-07 02:01:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4198782961460445) internal successors, (700), 493 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 700 transitions. [2021-11-07 02:01:33,851 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 700 transitions. Word has length 60 [2021-11-07 02:01:33,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:33,851 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 700 transitions. [2021-11-07 02:01:33,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 700 transitions. [2021-11-07 02:01:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:01:33,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:33,853 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 02:01:33,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:34,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:34,061 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 340073590, now seen corresponding path program 1 times [2021-11-07 02:01:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:34,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899242902] [2021-11-07 02:01:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:34,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:34,062 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:34,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:01:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:01:35,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:35,423 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:01:35,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 02:01:35,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:35,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:01:35,854 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:01:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 02:01:38,229 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:01:38,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 02:01:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:01:38,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:01:38,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:38,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899242902] [2021-11-07 02:01:38,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899242902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:38,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:38,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:01:38,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120493578] [2021-11-07 02:01:38,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:01:38,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:01:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:01:38,696 INFO L87 Difference]: Start difference. First operand 494 states and 700 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:09,205 INFO L93 Difference]: Finished difference Result 1390 states and 2010 transitions. [2021-11-07 02:02:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:02:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:02:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:09,212 INFO L225 Difference]: With dead ends: 1390 [2021-11-07 02:02:09,212 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 02:02:09,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 02:02:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 602. [2021-11-07 02:02:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.4509151414309485) internal successors, (872), 601 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 872 transitions. [2021-11-07 02:02:09,256 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 872 transitions. Word has length 82 [2021-11-07 02:02:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:09,256 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 872 transitions. [2021-11-07 02:02:09,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 872 transitions. [2021-11-07 02:02:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:02:09,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:09,259 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 02:02:09,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:09,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:09,473 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1945814063, now seen corresponding path program 1 times [2021-11-07 02:02:09,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:09,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936031075] [2021-11-07 02:02:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:09,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:09,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:09,478 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:09,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:02:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:10,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:11,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:11,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:11,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:02:11,113 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:02:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 02:02:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:02:11,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:02:11,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:02:11,575 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:02:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 02:02:13,986 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:02:13,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 02:02:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:02:14,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:02:14,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:14,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936031075] [2021-11-07 02:02:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936031075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:14,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:14,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:02:14,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186489096] [2021-11-07 02:02:14,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:02:14,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:02:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:14,436 INFO L87 Difference]: Start difference. First operand 602 states and 872 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:01,647 INFO L93 Difference]: Finished difference Result 1528 states and 2247 transitions. [2021-11-07 02:03:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:01,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:03:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:01,657 INFO L225 Difference]: With dead ends: 1528 [2021-11-07 02:03:01,657 INFO L226 Difference]: Without dead ends: 963 [2021-11-07 02:03:01,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:03:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-07 02:03:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 646. [2021-11-07 02:03:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.4852713178294574) internal successors, (958), 645 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 958 transitions. [2021-11-07 02:03:01,697 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 958 transitions. Word has length 83 [2021-11-07 02:03:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 958 transitions. [2021-11-07 02:03:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 958 transitions. [2021-11-07 02:03:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 02:03:01,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:01,705 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 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] [2021-11-07 02:03:01,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:03:01,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:01,925 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:03:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash -794443931, now seen corresponding path program 1 times [2021-11-07 02:03:01,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:01,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427497031] [2021-11-07 02:03:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:01,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:01,928 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:01,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:03:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:03,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:03,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:03,891 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:03:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 02:03:03,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:03,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:03,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:04,393 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:03:04,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 02:03:06,678 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:03:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 02:03:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:03:06,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:03:07,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:07,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427497031] [2021-11-07 02:03:07,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427497031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:07,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:07,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:03:07,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515825407] [2021-11-07 02:03:07,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:03:07,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:03:07,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:07,467 INFO L87 Difference]: Start difference. First operand 646 states and 958 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:39,780 INFO L93 Difference]: Finished difference Result 1663 states and 2492 transitions. [2021-11-07 02:03:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 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 111 [2021-11-07 02:03:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:39,787 INFO L225 Difference]: With dead ends: 1663 [2021-11-07 02:03:39,788 INFO L226 Difference]: Without dead ends: 1054 [2021-11-07 02:03:39,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:03:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-11-07 02:03:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 745. [2021-11-07 02:03:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.5013440860215055) internal successors, (1117), 744 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1117 transitions. [2021-11-07 02:03:39,834 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1117 transitions. Word has length 111 [2021-11-07 02:03:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:39,834 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1117 transitions. [2021-11-07 02:03:39,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1117 transitions. [2021-11-07 02:03:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 02:03:39,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:39,838 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 02:03:39,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:03:40,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:40,055 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:03:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1179895462, now seen corresponding path program 1 times [2021-11-07 02:03:40,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:40,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841596099] [2021-11-07 02:03:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:40,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:40,057 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:03:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:41,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:41,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:41,783 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:03:41,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 02:03:41,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:41,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:41,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:42,184 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:03:42,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 02:03:44,493 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:03:44,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 02:03:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:03:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:03:45,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:45,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841596099] [2021-11-07 02:03:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841596099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:45,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:45,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:03:45,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205869725] [2021-11-07 02:03:45,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:03:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:03:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:45,250 INFO L87 Difference]: Start difference. First operand 745 states and 1117 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:18,670 INFO L93 Difference]: Finished difference Result 1877 states and 2824 transitions. [2021-11-07 02:04:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:18,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 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 116 [2021-11-07 02:04:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:18,676 INFO L225 Difference]: With dead ends: 1877 [2021-11-07 02:04:18,676 INFO L226 Difference]: Without dead ends: 1169 [2021-11-07 02:04:18,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:04:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-11-07 02:04:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 854. [2021-11-07 02:04:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.5169988276670574) internal successors, (1294), 853 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1294 transitions. [2021-11-07 02:04:18,729 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1294 transitions. Word has length 116 [2021-11-07 02:04:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:18,730 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1294 transitions. [2021-11-07 02:04:18,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1294 transitions. [2021-11-07 02:04:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 02:04:18,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:18,734 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 02:04:18,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:18,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:18,950 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -801583245, now seen corresponding path program 1 times [2021-11-07 02:04:18,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:18,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042599923] [2021-11-07 02:04:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:18,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:18,952 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:18,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:04:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:20,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:20,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:20,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:20,781 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:04:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 02:04:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:20,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:20,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:21,177 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:04:21,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 02:04:23,703 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:04:23,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 02:04:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:04:23,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:04:24,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:24,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042599923] [2021-11-07 02:04:24,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042599923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:24,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:24,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:04:24,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224925047] [2021-11-07 02:04:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:04:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:04:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:04:24,414 INFO L87 Difference]: Start difference. First operand 854 states and 1294 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:55,659 INFO L93 Difference]: Finished difference Result 1978 states and 2985 transitions. [2021-11-07 02:04:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 117 [2021-11-07 02:04:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:55,667 INFO L225 Difference]: With dead ends: 1978 [2021-11-07 02:04:55,667 INFO L226 Difference]: Without dead ends: 1161 [2021-11-07 02:04:55,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:04:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-07 02:04:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 854. [2021-11-07 02:04:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.5123094958968346) internal successors, (1290), 853 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1290 transitions. [2021-11-07 02:04:55,743 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1290 transitions. Word has length 117 [2021-11-07 02:04:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:55,744 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1290 transitions. [2021-11-07 02:04:55,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1290 transitions. [2021-11-07 02:04:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 02:04:55,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:55,748 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 02:04:55,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:55,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,976 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2033381055, now seen corresponding path program 1 times [2021-11-07 02:04:55,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:55,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501544743] [2021-11-07 02:04:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:55,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:55,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:55,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:04:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:57,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:04:58,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:04:58,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:58,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501544743] [2021-11-07 02:04:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501544743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:58,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:58,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:58,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801306519] [2021-11-07 02:04:58,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:58,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:58,566 INFO L87 Difference]: Start difference. First operand 854 states and 1290 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:59,600 INFO L93 Difference]: Finished difference Result 3151 states and 4786 transitions. [2021-11-07 02:04:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 125 [2021-11-07 02:04:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:59,614 INFO L225 Difference]: With dead ends: 3151 [2021-11-07 02:04:59,615 INFO L226 Difference]: Without dead ends: 2334 [2021-11-07 02:04:59,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-11-07 02:04:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2324. [2021-11-07 02:04:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 1.5126990959965563) internal successors, (3514), 2323 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3514 transitions. [2021-11-07 02:04:59,877 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3514 transitions. Word has length 125 [2021-11-07 02:04:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:59,878 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 3514 transitions. [2021-11-07 02:04:59,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3514 transitions. [2021-11-07 02:04:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 02:04:59,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:59,918 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 02:04:59,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:00,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:00,119 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2053704705, now seen corresponding path program 1 times [2021-11-07 02:05:00,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:00,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887737217] [2021-11-07 02:05:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:00,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:00,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:00,122 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:00,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab5b2ebe-1c4f-43fe-829e-2c89a71c3e69/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:05:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:02,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:05:02,601 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:05:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 02:05:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:05:02,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:05:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:05:03,169 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:05:03,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 02:05:06,188 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:05:06,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 02:05:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:05:06,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:05:07,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:07,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887737217] [2021-11-07 02:05:07,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887737217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:07,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:07,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-07 02:05:07,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34266915] [2021-11-07 02:05:07,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:05:07,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:07,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:05:07,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:05:07,871 INFO L87 Difference]: Start difference. First operand 2324 states and 3514 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)