./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:07:59,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:07:59,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:07:59,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:07:59,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:07:59,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:07:59,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:07:59,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:07:59,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:07:59,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:07:59,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:07:59,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:07:59,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:07:59,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:07:59,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:07:59,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:07:59,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:07:59,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:07:59,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:07:59,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:07:59,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:07:59,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:07:59,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:07:59,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:07:59,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:07:59,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:07:59,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:07:59,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:07:59,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:07:59,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:07:59,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:07:59,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:07:59,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:07:59,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:07:59,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:07:59,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:07:59,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:07:59,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:07:59,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:07:59,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:07:59,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:07:59,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:07:59,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:07:59,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:07:59,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:07:59,270 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:07:59,270 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:07:59,271 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:07:59,271 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:07:59,271 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:07:59,271 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:07:59,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:07:59,271 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:07:59,272 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:07:59,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:07:59,272 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:07:59,272 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:07:59,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:07:59,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:07:59,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:07:59,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:07:59,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:07:59,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:07:59,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:07:59,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:07:59,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:07:59,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:07:59,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:07:59,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:07:59,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:07:59,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:07:59,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:07:59,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:07:59,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:07:59,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:07:59,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:07:59,276 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:07:59,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:07:59,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:07:59,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:07:59,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:07:59,277 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_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-03 05:07:59,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:07:59,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:07:59,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:07:59,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:07:59,532 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:07:59,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-03 05:07:59,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/5d0cff72b/81bc50a8121d43c7a13514da3ea0a812/FLAG084dd0c28 [2021-11-03 05:08:00,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:08:00,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-03 05:08:00,245 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/5d0cff72b/81bc50a8121d43c7a13514da3ea0a812/FLAG084dd0c28 [2021-11-03 05:08:00,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/5d0cff72b/81bc50a8121d43c7a13514da3ea0a812 [2021-11-03 05:08:00,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:08:00,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:08:00,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:08:00,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:08:00,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:08:00,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:08:00" (1/1) ... [2021-11-03 05:08:00,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8bc6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:00, skipping insertion in model container [2021-11-03 05:08:00,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:08:00" (1/1) ... [2021-11-03 05:08:00,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:08:00,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:08:01,005 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_fb53f170-552c-40dc-91a5-b34fa06ec332/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-03 05:08:01,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:08:01,028 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:08:01,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5aa2a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:01, skipping insertion in model container [2021-11-03 05:08:01,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:08:01,030 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:08:01,032 INFO L168 Benchmark]: Toolchain (without parser) took 575.55 ms. Allocated memory is still 134.2 MB. Free memory was 98.1 MB in the beginning and 100.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:08:01,032 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory is still 50.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:08:01,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.35 ms. Allocated memory is still 134.2 MB. Free memory was 98.1 MB in the beginning and 100.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:08:01,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory is still 50.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 558.35 ms. Allocated memory is still 134.2 MB. Free memory was 98.1 MB in the beginning and 100.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.6 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_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:08:03,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:08:03,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:08:03,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:08:03,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:08:03,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:08:03,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:08:03,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:08:03,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:08:03,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:08:03,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:08:03,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:08:03,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:08:03,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:08:03,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:08:03,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:08:03,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:08:03,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:08:03,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:08:03,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:08:03,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:08:03,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:08:03,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:08:03,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:08:03,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:08:03,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:08:03,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:08:03,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:08:03,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:08:03,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:08:03,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:08:03,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:08:03,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:08:03,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:08:03,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:08:03,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:08:03,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:08:03,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:08:03,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:08:03,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:08:03,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:08:03,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:08:03,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:08:03,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:08:03,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:08:03,448 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:08:03,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:08:03,449 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:08:03,449 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:08:03,449 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:08:03,450 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:08:03,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:08:03,451 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:08:03,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:08:03,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:08:03,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:08:03,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:08:03,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:08:03,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:08:03,452 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:08:03,453 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:08:03,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:08:03,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:08:03,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:08:03,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:08:03,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:08:03,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:08:03,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:08:03,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:08:03,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:08:03,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:08:03,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:08:03,456 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:08:03,456 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:08:03,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:08:03,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:08:03,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:08:03,457 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_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-03 05:08:03,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:08:03,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:08:03,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:08:03,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:08:03,895 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:08:03,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-03 05:08:03,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/e5ab8fbe5/8d4e4e2c45194ecab16f529801e6a139/FLAG3cdc524df [2021-11-03 05:08:04,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:08:04,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-03 05:08:04,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/e5ab8fbe5/8d4e4e2c45194ecab16f529801e6a139/FLAG3cdc524df [2021-11-03 05:08:04,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/data/e5ab8fbe5/8d4e4e2c45194ecab16f529801e6a139 [2021-11-03 05:08:04,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:08:04,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:08:04,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:08:04,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:08:04,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:08:04,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:08:04" (1/1) ... [2021-11-03 05:08:04,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3436f4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:04, skipping insertion in model container [2021-11-03 05:08:04,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:08:04" (1/1) ... [2021-11-03 05:08:04,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:08:04,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:08:05,434 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_fb53f170-552c-40dc-91a5-b34fa06ec332/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-03 05:08:05,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:08:05,478 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:08:05,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:08:05,656 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_fb53f170-552c-40dc-91a5-b34fa06ec332/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-03 05:08:05,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:08:05,667 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:08:05,795 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_fb53f170-552c-40dc-91a5-b34fa06ec332/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-03 05:08:05,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:08:05,818 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:08:05,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05 WrapperNode [2021-11-03 05:08:05,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:08:05,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:08:05,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:08:05,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:08:05,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:05,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:05,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:08:05,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:08:05,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:08:05,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:08:05,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:05,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:05,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:05,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:05,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:06,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:06,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:06,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:08:06,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:08:06,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:08:06,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:08:06,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (1/1) ... [2021-11-03 05:08:06,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:08:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:08:06,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:08:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:08:06,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:08:06,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:08:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:08:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:08:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:08:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:08:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:08:06,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:08:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:08:06,389 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 05:08:14,943 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 05:08:14,943 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 05:08:14,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:08:14,955 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:08:14,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:08:14 BoogieIcfgContainer [2021-11-03 05:08:14,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:08:14,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:08:14,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:08:14,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:08:14,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:08:04" (1/3) ... [2021-11-03 05:08:14,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61479c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:08:14, skipping insertion in model container [2021-11-03 05:08:14,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:05" (2/3) ... [2021-11-03 05:08:14,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61479c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:08:14, skipping insertion in model container [2021-11-03 05:08:14,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:08:14" (3/3) ... [2021-11-03 05:08:14,966 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-1.c [2021-11-03 05:08:14,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:08:14,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:08:15,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:08:15,039 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:08:15,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:08:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 05:08:15,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:15,079 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:15,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453275, now seen corresponding path program 1 times [2021-11-03 05:08:15,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:08:15,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505287629] [2021-11-03 05:08:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:15,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:08:15,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:08:15,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:08:15,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:08:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:08:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:08:15,681 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 [2021-11-03 05:08:15,693 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 [2021-11-03 05:08:15,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:15,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 05:08:15,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:15,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 05:08:15,877 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 [2021-11-03 05:08:16,343 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 05:08:16,344 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 [2021-11-03 05:08:16,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:16,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 05:08:16,461 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 [2021-11-03 05:08:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,561 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 [2021-11-03 05:08:16,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,593 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 [2021-11-03 05:08:16,742 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 05:08:16,742 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 [2021-11-03 05:08:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:16,776 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 [2021-11-03 05:08:16,822 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 [2021-11-03 05:08:16,827 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 [2021-11-03 05:08:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:16,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:08:17,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 05:08:17,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 05:08:17,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 05:08:17,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 05:08:17,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 05:08:17,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 05:08:17,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 05:08:17,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:17,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 05:08:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:18,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:08:18,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505287629] [2021-11-03 05:08:18,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505287629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:18,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:18,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:08:18,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080298841] [2021-11-03 05:08:18,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:08:18,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:08:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:08:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:08:18,147 INFO L87 Difference]: Start difference. First operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 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 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:37,059 INFO L93 Difference]: Finished difference Result 323 states and 551 transitions. [2021-11-03 05:08:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:08:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 05:08:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:37,073 INFO L225 Difference]: With dead ends: 323 [2021-11-03 05:08:37,073 INFO L226 Difference]: Without dead ends: 148 [2021-11-03 05:08:37,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:08:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-03 05:08:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-03 05:08:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5714285714285714) internal successors, (231), 147 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 231 transitions. [2021-11-03 05:08:37,119 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 231 transitions. Word has length 46 [2021-11-03 05:08:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:37,120 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 231 transitions. [2021-11-03 05:08:37,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 231 transitions. [2021-11-03 05:08:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 05:08:37,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:37,123 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:37,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:08:37,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:08:37,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash 176126179, now seen corresponding path program 1 times [2021-11-03 05:08:37,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:08:37,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079496590] [2021-11-03 05:08:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:37,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:08:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:08:37,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:08:37,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:08:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:08:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:08:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:08:38,218 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:08:38,219 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 [2021-11-03 05:08:41,559 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:08:41,560 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 [2021-11-03 05:08:49,378 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:08:49,378 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 [2021-11-03 05:08:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:49,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:08:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:57,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:08:57,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079496590] [2021-11-03 05:08:57,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079496590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:57,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:57,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 05:08:57,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662666976] [2021-11-03 05:08:57,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:08:57,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:08:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:08:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 05:08:57,834 INFO L87 Difference]: Start difference. First operand 148 states and 231 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:21,360 INFO L93 Difference]: Finished difference Result 314 states and 490 transitions. [2021-11-03 05:09:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:09:21,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 05:09:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:21,365 INFO L225 Difference]: With dead ends: 314 [2021-11-03 05:09:21,365 INFO L226 Difference]: Without dead ends: 176 [2021-11-03 05:09:21,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-03 05:09:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-03 05:09:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2021-11-03 05:09:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5822784810126582) internal successors, (250), 158 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 250 transitions. [2021-11-03 05:09:21,381 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 250 transitions. Word has length 46 [2021-11-03 05:09:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:09:21,381 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 250 transitions. [2021-11-03 05:09:21,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 250 transitions. [2021-11-03 05:09:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:09:21,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:09:21,385 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, 1, 1, 1] [2021-11-03 05:09:21,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:09:21,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:09:21,591 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:09:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:09:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash 755663040, now seen corresponding path program 1 times [2021-11-03 05:09:21,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:09:21,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906484913] [2021-11-03 05:09:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:09:21,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:09:21,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:09:21,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:09:21,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:09:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:09:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:09:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:09:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:22,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:22,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:09:22,483 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:09:22,484 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 [2021-11-03 05:09:25,632 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:09:25,632 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 [2021-11-03 05:09:33,057 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:09:33,058 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 [2021-11-03 05:09:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:09:33,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:09:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:09:33,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:09:33,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906484913] [2021-11-03 05:09:33,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906484913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:09:33,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:09:33,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:09:33,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760380811] [2021-11-03 05:09:33,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:09:33,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:09:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:09:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:09:33,586 INFO L87 Difference]: Start difference. First operand 159 states and 250 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) [2021-11-03 05:10:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:12,331 INFO L93 Difference]: Finished difference Result 441 states and 691 transitions. [2021-11-03 05:10:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:10:12,333 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 59 [2021-11-03 05:10:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:12,336 INFO L225 Difference]: With dead ends: 441 [2021-11-03 05:10:12,337 INFO L226 Difference]: Without dead ends: 303 [2021-11-03 05:10:12,338 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 [2021-11-03 05:10:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-03 05:10:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 175. [2021-11-03 05:10:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5804597701149425) internal successors, (275), 174 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 275 transitions. [2021-11-03 05:10:12,355 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 275 transitions. Word has length 59 [2021-11-03 05:10:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 275 transitions. [2021-11-03 05:10:12,355 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) [2021-11-03 05:10:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 275 transitions. [2021-11-03 05:10:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:10:12,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:12,374 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, 1, 1, 1] [2021-11-03 05:10:12,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:12,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:12,575 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1854767371, now seen corresponding path program 1 times [2021-11-03 05:10:12,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:12,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246434680] [2021-11-03 05:10:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:12,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:12,578 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:12,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:10:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:10:13,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:13,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:13,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:13,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:13,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:13,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:13,610 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:10:13,610 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 [2021-11-03 05:10:16,840 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:10:16,840 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 [2021-11-03 05:10:23,573 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:10:23,573 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 [2021-11-03 05:10:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:23,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:24,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:24,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246434680] [2021-11-03 05:10:24,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246434680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:24,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:24,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:10:24,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121315266] [2021-11-03 05:10:24,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:10:24,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:10:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:10:24,065 INFO L87 Difference]: Start difference. First operand 175 states and 275 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) [2021-11-03 05:11:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:12,629 INFO L93 Difference]: Finished difference Result 503 states and 791 transitions. [2021-11-03 05:11:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:11:12,630 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 60 [2021-11-03 05:11:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:12,632 INFO L225 Difference]: With dead ends: 503 [2021-11-03 05:11:12,632 INFO L226 Difference]: Without dead ends: 349 [2021-11-03 05:11:12,634 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 [2021-11-03 05:11:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-03 05:11:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 213. [2021-11-03 05:11:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5566037735849056) internal successors, (330), 212 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 330 transitions. [2021-11-03 05:11:12,652 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 330 transitions. Word has length 60 [2021-11-03 05:11:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:12,652 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 330 transitions. [2021-11-03 05:11:12,652 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) [2021-11-03 05:11:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 330 transitions. [2021-11-03 05:11:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:11:12,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:12,653 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, 1, 1, 1] [2021-11-03 05:11:12,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:12,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:11:12,869 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 219231991, now seen corresponding path program 1 times [2021-11-03 05:11:12,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:12,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343545139] [2021-11-03 05:11:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:12,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:12,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:12,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:11:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:13,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:11:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:13,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:13,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:13,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:13,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:13,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:11:13,950 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:11:13,951 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 [2021-11-03 05:11:17,008 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:11:17,008 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 [2021-11-03 05:11:23,757 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:11:23,758 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 [2021-11-03 05:11:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:11:23,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:11:24,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:11:24,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343545139] [2021-11-03 05:11:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343545139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:11:24,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:11:24,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:11:24,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211214292] [2021-11-03 05:11:24,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:11:24,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:11:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:11:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:11:24,190 INFO L87 Difference]: Start difference. First operand 213 states and 330 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) [2021-11-03 05:11:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:11:54,942 INFO L93 Difference]: Finished difference Result 512 states and 796 transitions. [2021-11-03 05:11:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:11:54,944 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 60 [2021-11-03 05:11:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:11:54,947 INFO L225 Difference]: With dead ends: 512 [2021-11-03 05:11:54,947 INFO L226 Difference]: Without dead ends: 347 [2021-11-03 05:11:54,948 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 [2021-11-03 05:11:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-03 05:11:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 226. [2021-11-03 05:11:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5377777777777777) internal successors, (346), 225 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:11:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 346 transitions. [2021-11-03 05:11:54,962 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 346 transitions. Word has length 60 [2021-11-03 05:11:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:11:54,963 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 346 transitions. [2021-11-03 05:11:54,963 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) [2021-11-03 05:11:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 346 transitions. [2021-11-03 05:11:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:11:54,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:11:54,965 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, 1, 1, 1] [2021-11-03 05:11:54,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:11:55,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:11:55,170 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:11:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:11:55,170 INFO L85 PathProgramCache]: Analyzing trace with hash -426584320, now seen corresponding path program 1 times [2021-11-03 05:11:55,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:11:55,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320757724] [2021-11-03 05:11:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:11:55,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:11:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:11:55,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:11:55,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:11:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:11:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:11:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:11:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:55,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:11:55,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:11:56,158 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:11:56,159 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 [2021-11-03 05:11:59,378 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:11:59,378 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 [2021-11-03 05:12:06,916 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:12:06,916 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 [2021-11-03 05:12:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:07,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:07,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320757724] [2021-11-03 05:12:07,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320757724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:07,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:07,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:12:07,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445625514] [2021-11-03 05:12:07,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:12:07,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:12:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:12:07,459 INFO L87 Difference]: Start difference. First operand 226 states and 346 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:49,739 INFO L93 Difference]: Finished difference Result 549 states and 849 transitions. [2021-11-03 05:12:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:12:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-03 05:12:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:49,743 INFO L225 Difference]: With dead ends: 549 [2021-11-03 05:12:49,743 INFO L226 Difference]: Without dead ends: 371 [2021-11-03 05:12:49,744 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 [2021-11-03 05:12:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-03 05:12:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 260. [2021-11-03 05:12:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.528957528957529) internal successors, (396), 259 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:49,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 396 transitions. [2021-11-03 05:12:49,757 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 396 transitions. Word has length 60 [2021-11-03 05:12:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:49,758 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 396 transitions. [2021-11-03 05:12:49,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 396 transitions. [2021-11-03 05:12:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:12:49,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:49,760 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, 1, 1, 1] [2021-11-03 05:12:49,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:12:49,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1898096192, now seen corresponding path program 1 times [2021-11-03 05:12:49,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:49,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827397596] [2021-11-03 05:12:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:49,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:49,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:49,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:49,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:12:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:12:50,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:50,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:12:50,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:12:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:12:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:12:50,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:12:50,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:12:51,050 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:12:51,051 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 [2021-11-03 05:12:54,221 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:12:54,221 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 [2021-11-03 05:13:01,491 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:13:01,492 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 [2021-11-03 05:13:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:01,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:02,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:02,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827397596] [2021-11-03 05:13:02,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827397596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:02,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:02,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:13:02,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484671663] [2021-11-03 05:13:02,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:13:02,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:13:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:13:02,015 INFO L87 Difference]: Start difference. First operand 260 states and 396 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:49,953 INFO L93 Difference]: Finished difference Result 605 states and 927 transitions. [2021-11-03 05:13:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:13:49,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2021-11-03 05:13:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:49,957 INFO L225 Difference]: With dead ends: 605 [2021-11-03 05:13:49,958 INFO L226 Difference]: Without dead ends: 381 [2021-11-03 05:13:49,958 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 [2021-11-03 05:13:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-03 05:13:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 247. [2021-11-03 05:13:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.5203252032520325) internal successors, (374), 246 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 374 transitions. [2021-11-03 05:13:49,972 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 374 transitions. Word has length 60 [2021-11-03 05:13:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:49,972 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 374 transitions. [2021-11-03 05:13:49,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 374 transitions. [2021-11-03 05:13:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:13:49,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:49,974 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, 1, 1, 1] [2021-11-03 05:13:49,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:50,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:50,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1895442121, now seen corresponding path program 1 times [2021-11-03 05:13:50,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:50,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121917907] [2021-11-03 05:13:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:50,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:50,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:50,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:13:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:50,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:50,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:51,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:51,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121917907] [2021-11-03 05:13:51,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121917907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:51,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:51,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:13:51,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672760464] [2021-11-03 05:13:51,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:51,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:51,181 INFO L87 Difference]: Start difference. First operand 247 states and 374 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:51,246 INFO L93 Difference]: Finished difference Result 871 states and 1330 transitions. [2021-11-03 05:13:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:13:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:51,251 INFO L225 Difference]: With dead ends: 871 [2021-11-03 05:13:51,251 INFO L226 Difference]: Without dead ends: 660 [2021-11-03 05:13:51,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-03 05:13:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 452. [2021-11-03 05:13:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5121951219512195) internal successors, (682), 451 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 682 transitions. [2021-11-03 05:13:51,274 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 682 transitions. Word has length 60 [2021-11-03 05:13:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:51,274 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 682 transitions. [2021-11-03 05:13:51,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 682 transitions. [2021-11-03 05:13:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:13:51,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:51,276 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, 1, 1, 1] [2021-11-03 05:13:51,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:51,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:51,499 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash -471252473, now seen corresponding path program 1 times [2021-11-03 05:13:51,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:51,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748651215] [2021-11-03 05:13:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:51,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:51,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:51,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:13:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:13:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:13:52,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:13:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:13:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:13:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:13:52,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:13:52,783 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:13:52,783 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:13:56,063 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:13:56,064 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 [2021-11-03 05:14:02,686 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:14:02,686 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 [2021-11-03 05:14:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:02,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:03,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:03,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748651215] [2021-11-03 05:14:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748651215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:03,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:14:03,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:14:03,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420817265] [2021-11-03 05:14:03,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:14:03,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:14:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:14:03,075 INFO L87 Difference]: Start difference. First operand 452 states and 682 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) [2021-11-03 05:14:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:40,060 INFO L93 Difference]: Finished difference Result 906 states and 1372 transitions. [2021-11-03 05:14:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:14:40,061 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 60 [2021-11-03 05:14:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:40,065 INFO L225 Difference]: With dead ends: 906 [2021-11-03 05:14:40,066 INFO L226 Difference]: Without dead ends: 700 [2021-11-03 05:14:40,066 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 [2021-11-03 05:14:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-03 05:14:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 452. [2021-11-03 05:14:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5099778270509978) internal successors, (681), 451 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 681 transitions. [2021-11-03 05:14:40,088 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 681 transitions. Word has length 60 [2021-11-03 05:14:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:40,089 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 681 transitions. [2021-11-03 05:14:40,089 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) [2021-11-03 05:14:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 681 transitions. [2021-11-03 05:14:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:14:40,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:40,091 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, 1, 1, 1] [2021-11-03 05:14:40,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:40,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:14:40,307 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -385909570, now seen corresponding path program 1 times [2021-11-03 05:14:40,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:40,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450498676] [2021-11-03 05:14:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:40,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:40,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:40,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:40,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:14:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:14:41,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:41,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:41,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:14:41,424 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:14:41,425 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 [2021-11-03 05:14:44,503 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:14:44,504 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 [2021-11-03 05:14:51,816 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:14:51,817 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 [2021-11-03 05:14:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:51,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:52,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:52,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450498676] [2021-11-03 05:14:52,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450498676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:52,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:14:52,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:14:52,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448946276] [2021-11-03 05:14:52,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:14:52,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:14:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:14:52,236 INFO L87 Difference]: Start difference. First operand 452 states and 681 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:15:32,531 INFO L93 Difference]: Finished difference Result 1115 states and 1696 transitions. [2021-11-03 05:15:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:15:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-03 05:15:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:15:32,536 INFO L225 Difference]: With dead ends: 1115 [2021-11-03 05:15:32,536 INFO L226 Difference]: Without dead ends: 700 [2021-11-03 05:15:32,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:15:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-03 05:15:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 399. [2021-11-03 05:15:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.5276381909547738) internal successors, (608), 398 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 608 transitions. [2021-11-03 05:15:32,557 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 608 transitions. Word has length 60 [2021-11-03 05:15:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:15:32,557 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 608 transitions. [2021-11-03 05:15:32,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:15:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 608 transitions. [2021-11-03 05:15:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:15:32,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:15:32,559 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, 1, 1, 1] [2021-11-03 05:15:32,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:32,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:15:32,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:15:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:15:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1920769353, now seen corresponding path program 1 times [2021-11-03 05:15:32,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:15:32,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380589768] [2021-11-03 05:15:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:32,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:15:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:15:32,777 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:15:32,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:15:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:15:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:15:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:15:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:15:33,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:15:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:15:33,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:15:34,039 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:15:34,039 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 [2021-11-03 05:15:37,126 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:15:37,126 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 [2021-11-03 05:15:43,956 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:15:43,957 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 [2021-11-03 05:15:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:15:44,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:15:44,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:15:44,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380589768] [2021-11-03 05:15:44,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380589768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:15:44,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:15:44,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:15:44,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491381068] [2021-11-03 05:15:44,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:15:44,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:15:44,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:15:44,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:15:44,374 INFO L87 Difference]: Start difference. First operand 399 states and 608 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) [2021-11-03 05:16:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:24,702 INFO L93 Difference]: Finished difference Result 1006 states and 1542 transitions. [2021-11-03 05:16:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:16:24,703 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 61 [2021-11-03 05:16:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:24,707 INFO L225 Difference]: With dead ends: 1006 [2021-11-03 05:16:24,707 INFO L226 Difference]: Without dead ends: 644 [2021-11-03 05:16:24,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:16:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-03 05:16:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 424. [2021-11-03 05:16:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.5106382978723405) internal successors, (639), 423 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 639 transitions. [2021-11-03 05:16:24,730 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 639 transitions. Word has length 61 [2021-11-03 05:16:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:24,730 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 639 transitions. [2021-11-03 05:16:24,731 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) [2021-11-03 05:16:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 639 transitions. [2021-11-03 05:16:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 05:16:24,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:24,732 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, 1, 1, 1] [2021-11-03 05:16:24,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:24,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:24,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1011603538, now seen corresponding path program 1 times [2021-11-03 05:16:24,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:24,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251019884] [2021-11-03 05:16:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:24,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:24,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:24,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:16:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:25,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:16:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:25,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:25,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:16:26,213 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:16:26,213 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 [2021-11-03 05:16:29,298 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:16:29,299 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 [2021-11-03 05:16:36,164 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:16:36,165 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 [2021-11-03 05:16:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:36,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:36,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:36,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251019884] [2021-11-03 05:16:36,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251019884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:36,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:36,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:16:36,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772957448] [2021-11-03 05:16:36,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:16:36,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:16:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:16:36,628 INFO L87 Difference]: Start difference. First operand 424 states and 639 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:15,787 INFO L93 Difference]: Finished difference Result 1056 states and 1602 transitions. [2021-11-03 05:17:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:17:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 05:17:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:15,791 INFO L225 Difference]: With dead ends: 1056 [2021-11-03 05:17:15,791 INFO L226 Difference]: Without dead ends: 669 [2021-11-03 05:17:15,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:17:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-03 05:17:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 473. [2021-11-03 05:17:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.4809322033898304) internal successors, (699), 472 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 699 transitions. [2021-11-03 05:17:15,827 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 699 transitions. Word has length 62 [2021-11-03 05:17:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:15,827 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 699 transitions. [2021-11-03 05:17:15,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 699 transitions. [2021-11-03 05:17:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:17:15,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:15,830 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, 1, 1, 1] [2021-11-03 05:17:15,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 05:17:16,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:16,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:16,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:16,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2021179534, now seen corresponding path program 1 times [2021-11-03 05:17:16,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:16,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474574354] [2021-11-03 05:17:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:16,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:16,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:16,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:17:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:17:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:17:17,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:17:17,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:17:17,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:17:17,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:17:17,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:17:17,537 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:17:17,537 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 [2021-11-03 05:17:20,808 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:17:20,808 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 [2021-11-03 05:17:27,954 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:17:27,955 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 [2021-11-03 05:17:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:28,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:28,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:28,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474574354] [2021-11-03 05:17:28,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474574354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:28,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:28,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:17:28,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112454268] [2021-11-03 05:17:28,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:17:28,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:17:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:17:28,397 INFO L87 Difference]: Start difference. First operand 473 states and 699 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:15,943 INFO L93 Difference]: Finished difference Result 1183 states and 1772 transitions. [2021-11-03 05:18:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:18:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 05:18:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:15,948 INFO L225 Difference]: With dead ends: 1183 [2021-11-03 05:18:15,948 INFO L226 Difference]: Without dead ends: 747 [2021-11-03 05:18:15,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:18:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-11-03 05:18:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 504. [2021-11-03 05:18:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.4652087475149105) internal successors, (737), 503 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 737 transitions. [2021-11-03 05:18:15,977 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 737 transitions. Word has length 63 [2021-11-03 05:18:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:15,978 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 737 transitions. [2021-11-03 05:18:15,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 737 transitions. [2021-11-03 05:18:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:18:15,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:15,980 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, 1, 1, 1] [2021-11-03 05:18:16,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:16,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:16,198 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash 485580554, now seen corresponding path program 1 times [2021-11-03 05:18:16,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:16,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422765040] [2021-11-03 05:18:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:16,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:16,200 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:16,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:18:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:17,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:17,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:17,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:17,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:17,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:17,653 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:18:17,653 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 [2021-11-03 05:18:18,658 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:18:18,658 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 [2021-11-03 05:18:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:18,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:18,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:18,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422765040] [2021-11-03 05:18:18,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422765040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:18,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:18,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:18:18,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445912939] [2021-11-03 05:18:18,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:18:18,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:18,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:18:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:18,984 INFO L87 Difference]: Start difference. First operand 504 states and 737 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:34,293 INFO L93 Difference]: Finished difference Result 1028 states and 1510 transitions. [2021-11-03 05:18:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 05:18:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:34,297 INFO L225 Difference]: With dead ends: 1028 [2021-11-03 05:18:34,297 INFO L226 Difference]: Without dead ends: 561 [2021-11-03 05:18:34,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-03 05:18:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 547. [2021-11-03 05:18:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.4542124542124542) internal successors, (794), 546 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 794 transitions. [2021-11-03 05:18:34,326 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 794 transitions. Word has length 63 [2021-11-03 05:18:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:34,326 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 794 transitions. [2021-11-03 05:18:34,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 794 transitions. [2021-11-03 05:18:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:18:34,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:34,328 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, 1, 1, 1] [2021-11-03 05:18:34,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:34,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:34,545 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 467792946, now seen corresponding path program 1 times [2021-11-03 05:18:34,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:34,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514845939] [2021-11-03 05:18:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:34,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:34,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:34,547 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:34,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:18:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:18:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:35,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:35,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:35,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:35,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:35,972 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:18:35,972 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 [2021-11-03 05:18:39,043 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:18:39,043 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 [2021-11-03 05:18:46,040 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:18:46,040 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 [2021-11-03 05:18:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:46,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:46,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:46,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514845939] [2021-11-03 05:18:46,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514845939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:46,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:46,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:18:46,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497508023] [2021-11-03 05:18:46,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:18:46,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:18:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:18:46,495 INFO L87 Difference]: Start difference. First operand 547 states and 794 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:23,150 INFO L93 Difference]: Finished difference Result 1043 states and 1532 transitions. [2021-11-03 05:19:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:19:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 05:19:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:23,155 INFO L225 Difference]: With dead ends: 1043 [2021-11-03 05:19:23,155 INFO L226 Difference]: Without dead ends: 791 [2021-11-03 05:19:23,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:19:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-11-03 05:19:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 547. [2021-11-03 05:19:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.4523809523809523) internal successors, (793), 546 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 793 transitions. [2021-11-03 05:19:23,185 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 793 transitions. Word has length 63 [2021-11-03 05:19:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 793 transitions. [2021-11-03 05:19:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 793 transitions. [2021-11-03 05:19:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:19:23,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:23,187 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, 1, 1] [2021-11-03 05:19:23,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:23,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:23,404 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:19:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1965557864, now seen corresponding path program 1 times [2021-11-03 05:19:23,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:23,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052802251] [2021-11-03 05:19:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:23,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:23,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:23,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:19:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:19:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:24,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:24,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:24,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:24,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:24,773 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:19:24,775 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 [2021-11-03 05:19:24,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:24,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:24,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:25,108 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:19:25,109 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 [2021-11-03 05:19:27,137 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:19:27,137 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 [2021-11-03 05:19:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:19:27,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:19:27,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:27,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052802251] [2021-11-03 05:19:27,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052802251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:27,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:27,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:19:27,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497948759] [2021-11-03 05:19:27,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:19:27,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:19:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:19:27,566 INFO L87 Difference]: Start difference. First operand 547 states and 793 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:57,974 INFO L93 Difference]: Finished difference Result 1536 states and 2278 transitions. [2021-11-03 05:19:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:19:57,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:19:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:57,981 INFO L225 Difference]: With dead ends: 1536 [2021-11-03 05:19:57,982 INFO L226 Difference]: Without dead ends: 1026 [2021-11-03 05:19:57,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:19:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-11-03 05:19:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 653. [2021-11-03 05:19:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.4739263803680982) internal successors, (961), 652 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 961 transitions. [2021-11-03 05:19:58,019 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 961 transitions. Word has length 85 [2021-11-03 05:19:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:58,019 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 961 transitions. [2021-11-03 05:19:58,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 961 transitions. [2021-11-03 05:19:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 05:19:58,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:58,022 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, 1, 1, 1] [2021-11-03 05:19:58,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:58,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:58,239 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:19:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash -660899661, now seen corresponding path program 1 times [2021-11-03 05:19:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:58,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839578045] [2021-11-03 05:19:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:58,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:58,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:58,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:19:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:19:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:59,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:59,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:59,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:59,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:59,721 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:19:59,721 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 [2021-11-03 05:19:59,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:59,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:59,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:00,060 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:20:00,060 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 [2021-11-03 05:20:02,349 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:20:02,349 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 [2021-11-03 05:20:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:20:02,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:20:02,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:02,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839578045] [2021-11-03 05:20:02,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839578045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:02,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:02,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:20:02,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405624138] [2021-11-03 05:20:02,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:20:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:20:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:20:02,854 INFO L87 Difference]: Start difference. First operand 653 states and 961 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:36,611 INFO L93 Difference]: Finished difference Result 1666 states and 2499 transitions. [2021-11-03 05:20:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:20:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 05:20:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:36,617 INFO L225 Difference]: With dead ends: 1666 [2021-11-03 05:20:36,617 INFO L226 Difference]: Without dead ends: 1050 [2021-11-03 05:20:36,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:20:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-03 05:20:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 697. [2021-11-03 05:20:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.5043103448275863) internal successors, (1047), 696 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1047 transitions. [2021-11-03 05:20:36,655 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1047 transitions. Word has length 86 [2021-11-03 05:20:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:36,656 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1047 transitions. [2021-11-03 05:20:36,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1047 transitions. [2021-11-03 05:20:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-03 05:20:36,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:36,659 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, 1, 1, 1] [2021-11-03 05:20:36,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:36,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:36,874 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:20:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1795100272, now seen corresponding path program 1 times [2021-11-03 05:20:36,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:36,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329217273] [2021-11-03 05:20:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:36,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:36,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:36,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:20:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:20:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:38,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:38,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:38,495 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:20:38,495 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 [2021-11-03 05:20:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:38,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:38,863 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:20:38,864 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 [2021-11-03 05:20:40,498 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:20:40,499 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 [2021-11-03 05:20:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:20:40,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:20:41,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:41,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329217273] [2021-11-03 05:20:41,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329217273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:41,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:41,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:20:41,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134965540] [2021-11-03 05:20:41,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:20:41,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:20:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:20:41,051 INFO L87 Difference]: Start difference. First operand 697 states and 1047 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:13,075 INFO L93 Difference]: Finished difference Result 1819 states and 2763 transitions. [2021-11-03 05:21:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:21:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 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 114 [2021-11-03 05:21:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:13,080 INFO L225 Difference]: With dead ends: 1819 [2021-11-03 05:21:13,080 INFO L226 Difference]: Without dead ends: 1159 [2021-11-03 05:21:13,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:21:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-03 05:21:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 796. [2021-11-03 05:21:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.5169811320754718) internal successors, (1206), 795 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1206 transitions. [2021-11-03 05:21:13,141 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1206 transitions. Word has length 114 [2021-11-03 05:21:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:13,142 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1206 transitions. [2021-11-03 05:21:13,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1206 transitions. [2021-11-03 05:21:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-03 05:21:13,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:13,145 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, 1, 1, 1, 1] [2021-11-03 05:21:13,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:13,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:21:13,365 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:21:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash -688905657, now seen corresponding path program 1 times [2021-11-03 05:21:13,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:13,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934530843] [2021-11-03 05:21:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:13,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:13,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:13,367 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:13,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:21:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:21:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:21:14,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:21:15,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:15,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934530843] [2021-11-03 05:21:15,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934530843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:15,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:21:15,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:21:15,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327580774] [2021-11-03 05:21:15,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:21:15,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:21:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:21:15,244 INFO L87 Difference]: Start difference. First operand 796 states and 1206 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:16,188 INFO L93 Difference]: Finished difference Result 2994 states and 4581 transitions. [2021-11-03 05:21:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:21:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 120 [2021-11-03 05:21:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:16,197 INFO L225 Difference]: With dead ends: 2994 [2021-11-03 05:21:16,197 INFO L226 Difference]: Without dead ends: 2235 [2021-11-03 05:21:16,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:21:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-11-03 05:21:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2216. [2021-11-03 05:21:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 1.5115124153498871) internal successors, (3348), 2215 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3348 transitions. [2021-11-03 05:21:16,309 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3348 transitions. Word has length 120 [2021-11-03 05:21:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:16,309 INFO L470 AbstractCegarLoop]: Abstraction has 2216 states and 3348 transitions. [2021-11-03 05:21:16,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3348 transitions. [2021-11-03 05:21:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-03 05:21:16,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:16,315 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, 1, 1, 1, 1] [2021-11-03 05:21:16,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:16,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:21:16,534 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:21:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash -440759163, now seen corresponding path program 1 times [2021-11-03 05:21:16,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:16,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541675842] [2021-11-03 05:21:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:16,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:16,536 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:16,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:21:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:18,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:21:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:18,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:18,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:18,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:18,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:18,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:18,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:18,318 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:21:18,318 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 [2021-11-03 05:21:18,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:18,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:18,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:18,735 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:21:18,735 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 [2021-11-03 05:21:20,933 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:21:20,933 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 [2021-11-03 05:21:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:21:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:21:21,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:21,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541675842] [2021-11-03 05:21:21,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541675842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:21,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:21:21,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:21:21,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423131077] [2021-11-03 05:21:21,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:21:21,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:21:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:21:21,615 INFO L87 Difference]: Start difference. First operand 2216 states and 3348 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:51,731 INFO L93 Difference]: Finished difference Result 5883 states and 8855 transitions. [2021-11-03 05:21:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:21:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 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 120 [2021-11-03 05:21:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:51,763 INFO L225 Difference]: With dead ends: 5883 [2021-11-03 05:21:51,763 INFO L226 Difference]: Without dead ends: 3704 [2021-11-03 05:21:51,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:21:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-11-03 05:21:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2624. [2021-11-03 05:21:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.5211589782691575) internal successors, (3990), 2623 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3990 transitions. [2021-11-03 05:21:51,946 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3990 transitions. Word has length 120 [2021-11-03 05:21:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:51,947 INFO L470 AbstractCegarLoop]: Abstraction has 2624 states and 3990 transitions. [2021-11-03 05:21:51,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3990 transitions. [2021-11-03 05:21:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-03 05:21:51,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:51,953 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, 1, 1, 1, 1] [2021-11-03 05:21:51,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:52,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:21:52,172 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:21:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash -404149718, now seen corresponding path program 1 times [2021-11-03 05:21:52,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:52,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089917466] [2021-11-03 05:21:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:52,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:52,175 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb53f170-552c-40dc-91a5-b34fa06ec332/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:21:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:21:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:53,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:54,061 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:21:54,062 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 [2021-11-03 05:21:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:54,449 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:21:54,449 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 [2021-11-03 05:21:56,723 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:21:56,724 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 [2021-11-03 05:21:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:21:56,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:21:57,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:57,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089917466] [2021-11-03 05:21:57,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089917466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:57,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:21:57,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:21:57,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085145023] [2021-11-03 05:21:57,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:21:57,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:57,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:21:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:21:57,404 INFO L87 Difference]: Start difference. First operand 2624 states and 3990 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)