./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.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_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/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_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/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_fe42b9df-d26a-403c-82cb-e9c733837bff/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 d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:56:12,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:56:12,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:56:12,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:56:12,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:56:12,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:56:12,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:56:12,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:56:12,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:56:12,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:56:12,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:56:12,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:56:12,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:56:12,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:56:12,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:56:12,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:56:12,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:56:12,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:56:12,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:56:12,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:56:12,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:56:12,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:56:12,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:56:12,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:56:12,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:56:12,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:56:12,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:56:12,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:56:12,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:56:12,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:56:12,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:56:12,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:56:12,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:56:12,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:56:12,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:56:12,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:56:12,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:56:12,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:56:12,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:56:12,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:56:12,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:56:12,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:56:12,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:56:12,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:56:12,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:56:12,371 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:56:12,371 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:56:12,372 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:56:12,372 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:56:12,372 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:56:12,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:56:12,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:56:12,379 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:56:12,380 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:56:12,380 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:56:12,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:56:12,381 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:56:12,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:56:12,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:56:12,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:56:12,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:56:12,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:56:12,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:56:12,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:56:12,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:56:12,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:56:12,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:56:12,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:56:12,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:56:12,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:56:12,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:56:12,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:56:12,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:12,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:56:12,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:56:12,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:56:12,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:56:12,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:56:12,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:56:12,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:56:12,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:56:12,388 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_fe42b9df-d26a-403c-82cb-e9c733837bff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-03 04:56:12,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:56:12,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:56:12,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:56:12,796 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:56:12,797 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:56:12,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-03 04:56:12,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/a8dbdffbe/38ec9497483d419cb95d7fbebcc5686c/FLAGd13d42327 [2021-11-03 04:56:13,600 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:56:13,604 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-03 04:56:13,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/a8dbdffbe/38ec9497483d419cb95d7fbebcc5686c/FLAGd13d42327 [2021-11-03 04:56:13,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/a8dbdffbe/38ec9497483d419cb95d7fbebcc5686c [2021-11-03 04:56:13,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:56:13,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:56:13,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:13,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:56:13,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:56:13,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:13" (1/1) ... [2021-11-03 04:56:13,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426c034e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:13, skipping insertion in model container [2021-11-03 04:56:13,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:13" (1/1) ... [2021-11-03 04:56:13,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:56:13,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:14,308 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_fe42b9df-d26a-403c-82cb-e9c733837bff/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-03 04:56:14,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:14,352 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 04:56:14,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4356ef46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14, skipping insertion in model container [2021-11-03 04:56:14,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:14,353 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:56:14,361 INFO L168 Benchmark]: Toolchain (without parser) took 591.73 ms. Allocated memory is still 155.2 MB. Free memory was 118.1 MB in the beginning and 121.0 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:56:14,362 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 62.4 MB in the beginning and 62.3 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:56:14,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.97 ms. Allocated memory is still 155.2 MB. Free memory was 117.8 MB in the beginning and 121.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:56:14,366 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 62.4 MB in the beginning and 62.3 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 588.97 ms. Allocated memory is still 155.2 MB. Free memory was 117.8 MB in the beginning and 121.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/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_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/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_fe42b9df-d26a-403c-82cb-e9c733837bff/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 d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:56:16,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:56:16,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:56:16,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:56:16,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:56:16,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:56:16,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:56:16,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:56:16,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:56:16,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:56:16,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:56:16,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:56:16,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:56:16,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:56:16,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:56:16,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:56:16,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:56:16,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:56:16,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:56:16,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:56:16,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:56:16,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:56:16,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:56:16,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:56:16,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:56:16,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:56:16,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:56:16,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:56:16,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:56:16,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:56:16,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:56:16,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:56:16,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:56:16,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:56:16,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:56:16,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:56:16,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:56:16,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:56:16,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:56:16,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:56:16,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:56:16,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:56:16,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:56:16,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:56:16,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:56:16,791 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:56:16,791 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:56:16,791 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:56:16,791 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:56:16,791 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:56:16,792 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:56:16,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:56:16,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:56:16,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:56:16,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:56:16,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:56:16,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:56:16,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:56:16,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:56:16,796 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:56:16,796 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:56:16,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:56:16,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:56:16,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:56:16,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:56:16,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:56:16,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:56:16,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:56:16,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:16,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:56:16,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:56:16,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:56:16,798 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:56:16,798 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:56:16,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:56:16,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:56:16,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:56:16,800 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_fe42b9df-d26a-403c-82cb-e9c733837bff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-03 04:56:17,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:56:17,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:56:17,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:56:17,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:56:17,220 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:56:17,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-03 04:56:17,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/3b2313bdd/5c107d0c27af4aa9a998351846cb5e4e/FLAG87ceedda6 [2021-11-03 04:56:18,026 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:56:18,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-03 04:56:18,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/3b2313bdd/5c107d0c27af4aa9a998351846cb5e4e/FLAG87ceedda6 [2021-11-03 04:56:18,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/data/3b2313bdd/5c107d0c27af4aa9a998351846cb5e4e [2021-11-03 04:56:18,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:56:18,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:56:18,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:18,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:56:18,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:56:18,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:18" (1/1) ... [2021-11-03 04:56:18,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459b1413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:18, skipping insertion in model container [2021-11-03 04:56:18,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:18" (1/1) ... [2021-11-03 04:56:18,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:56:18,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:18,840 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_fe42b9df-d26a-403c-82cb-e9c733837bff/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-03 04:56:18,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:18,878 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:56:18,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:18,990 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_fe42b9df-d26a-403c-82cb-e9c733837bff/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-03 04:56:18,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:19,001 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:56:19,139 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_fe42b9df-d26a-403c-82cb-e9c733837bff/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-03 04:56:19,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:19,187 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:56:19,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19 WrapperNode [2021-11-03 04:56:19,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:19,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:56:19,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:56:19,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:56:19,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:56:19,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:56:19,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:56:19,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:56:19,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:56:19,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:56:19,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:56:19,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:56:19,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (1/1) ... [2021-11-03 04:56:19,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:56:19,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:56:19,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:56:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:56:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:56:19,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:56:19,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:56:19,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:56:19,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:56:19,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:56:19,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:56:19,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:56:19,862 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:56:28,389 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:56:28,389 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:56:28,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:56:28,397 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:56:28,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:28 BoogieIcfgContainer [2021-11-03 04:56:28,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:56:28,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:56:28,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:56:28,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:56:28,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:56:18" (1/3) ... [2021-11-03 04:56:28,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c682f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:28, skipping insertion in model container [2021-11-03 04:56:28,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:19" (2/3) ... [2021-11-03 04:56:28,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c682f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:28, skipping insertion in model container [2021-11-03 04:56:28,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:28" (3/3) ... [2021-11-03 04:56:28,407 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-2.c [2021-11-03 04:56:28,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:56:28,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:56:28,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:56:28,494 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 04:56:28,495 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:56:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 04:56:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 04:56:28,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:28,522 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:28,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-03 04:56:28,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:28,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695079252] [2021-11-03 04:56:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:28,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:28,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:28,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:56:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:56:28,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:29,202 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 04:56:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:29,431 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 04:56:29,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:29,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695079252] [2021-11-03 04:56:29,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695079252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:29,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:29,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:56:29,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516216351] [2021-11-03 04:56:29,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:29,467 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 04:56:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:29,712 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-03 04:56:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 37 [2021-11-03 04:56:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:29,737 INFO L225 Difference]: With dead ends: 566 [2021-11-03 04:56:29,737 INFO L226 Difference]: Without dead ends: 387 [2021-11-03 04:56:29,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 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 04:56:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-03 04:56:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-03 04:56:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 04:56:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-03 04:56:29,816 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-03 04:56:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:29,817 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-03 04:56:29,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 04:56:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-03 04:56:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:56:29,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:29,820 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] [2021-11-03 04:56:29,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:30,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:30,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1287801256, now seen corresponding path program 1 times [2021-11-03 04:56:30,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:30,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357874248] [2021-11-03 04:56:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:30,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:30,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:30,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:30,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:56:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:30,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:56:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:30,564 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 04:56:30,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:30,826 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 04:56:30,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:30,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357874248] [2021-11-03 04:56:30,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357874248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:30,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:30,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:56:30,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756800680] [2021-11-03 04:56:30,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:30,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:30,830 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 04:56:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:31,594 INFO L93 Difference]: Finished difference Result 884 states and 1359 transitions. [2021-11-03 04:56:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:31,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 04:56:31,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:31,600 INFO L225 Difference]: With dead ends: 884 [2021-11-03 04:56:31,600 INFO L226 Difference]: Without dead ends: 633 [2021-11-03 04:56:31,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 04:56:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-03 04:56:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2021-11-03 04:56:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.5206349206349206) internal successors, (958), 630 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 958 transitions. [2021-11-03 04:56:31,660 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 958 transitions. Word has length 61 [2021-11-03 04:56:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:31,661 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 958 transitions. [2021-11-03 04:56:31,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 04:56:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 958 transitions. [2021-11-03 04:56:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 04:56:31,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:31,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:56:31,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:31,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:31,888 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1861684425, now seen corresponding path program 1 times [2021-11-03 04:56:31,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:31,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490894504] [2021-11-03 04:56:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:31,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:31,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:31,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:31,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:56:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:56:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:56:32,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:56:33,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:33,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490894504] [2021-11-03 04:56:33,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490894504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:33,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:33,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:56:33,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085168233] [2021-11-03 04:56:33,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:33,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:33,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:33,106 INFO L87 Difference]: Start difference. First operand 631 states and 958 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 04:56:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:33,531 INFO L93 Difference]: Finished difference Result 1372 states and 2097 transitions. [2021-11-03 04:56:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-03 04:56:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:33,537 INFO L225 Difference]: With dead ends: 1372 [2021-11-03 04:56:33,539 INFO L226 Difference]: Without dead ends: 875 [2021-11-03 04:56:33,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 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 04:56:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-03 04:56:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-03 04:56:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states 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 04:56:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-03 04:56:33,584 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 117 [2021-11-03 04:56:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:33,586 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-03 04:56:33,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 04:56:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-03 04:56:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-03 04:56:33,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:33,596 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:33,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:33,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:33,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1505494372, now seen corresponding path program 1 times [2021-11-03 04:56:33,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:33,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323926254] [2021-11-03 04:56:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:33,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:33,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:33,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:33,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:56:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:56:34,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:56:34,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:56:35,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:35,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323926254] [2021-11-03 04:56:35,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323926254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:35,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:35,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:56:35,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534280471] [2021-11-03 04:56:35,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:35,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:35,165 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:35,582 INFO L93 Difference]: Finished difference Result 1860 states and 2833 transitions. [2021-11-03 04:56:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-03 04:56:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:35,589 INFO L225 Difference]: With dead ends: 1860 [2021-11-03 04:56:35,590 INFO L226 Difference]: Without dead ends: 1119 [2021-11-03 04:56:35,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 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 04:56:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-03 04:56:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-03 04:56:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.5143112701252237) internal successors, (1693), 1118 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 04:56:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1693 transitions. [2021-11-03 04:56:35,635 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1693 transitions. Word has length 146 [2021-11-03 04:56:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:35,636 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1693 transitions. [2021-11-03 04:56:35,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1693 transitions. [2021-11-03 04:56:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 04:56:35,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:35,640 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:35,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:35,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:35,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1562257391, now seen corresponding path program 1 times [2021-11-03 04:56:35,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:35,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542787188] [2021-11-03 04:56:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:35,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:35,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:35,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:56:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:56:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:37,072 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 04:56:37,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:56:37,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:37,183 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:56:37,201 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 04:56:37,700 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:56:37,701 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 849 treesize of output 821 [2021-11-03 04:56:37,796 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:56:37,797 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 04:56:37,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:37,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:56:37,832 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 04:56:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,941 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 04:56:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:37,971 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 04:56:38,079 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:56:38,079 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 04:56:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:38,111 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 04:56:38,145 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 04:56:38,150 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 04:56:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-03 04:56:38,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:39,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:56:39,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:56:39,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:56:39,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:56:39,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:56:39,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:56:39,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:56:39,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:39,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:56:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-03 04:56:39,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:39,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542787188] [2021-11-03 04:56:39,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542787188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:39,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:39,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:56:39,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071532482] [2021-11-03 04:56:39,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:56:39,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:56:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:56:39,991 INFO L87 Difference]: Start difference. First operand 1119 states and 1693 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:01,769 INFO L93 Difference]: Finished difference Result 2235 states and 3382 transitions. [2021-11-03 04:57:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:57:01,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-03 04:57:01,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:01,778 INFO L225 Difference]: With dead ends: 2235 [2021-11-03 04:57:01,779 INFO L226 Difference]: Without dead ends: 1119 [2021-11-03 04:57:01,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 331 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 04:57:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-03 04:57:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-03 04:57:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.513416815742397) internal successors, (1692), 1118 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 04:57:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1692 transitions. [2021-11-03 04:57:01,825 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1692 transitions. Word has length 170 [2021-11-03 04:57:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:01,825 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1692 transitions. [2021-11-03 04:57:01,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1692 transitions. [2021-11-03 04:57:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 04:57:01,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:01,830 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:01,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:02,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:02,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:57:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash 872425901, now seen corresponding path program 1 times [2021-11-03 04:57:02,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:02,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409983860] [2021-11-03 04:57:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:02,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:02,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:02,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:57:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:03,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:57:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:03,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:03,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:03,475 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:57:03,476 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 04:57:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:03,908 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:57:03,908 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 04:57:05,338 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:57:05,339 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 04:57:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-03 04:57:05,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-03 04:57:06,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:06,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409983860] [2021-11-03 04:57:06,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409983860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:06,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:06,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:57:06,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046531187] [2021-11-03 04:57:06,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:57:06,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:57:06,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:57:06,301 INFO L87 Difference]: Start difference. First operand 1119 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 04:57:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:39,286 INFO L93 Difference]: Finished difference Result 4218 states and 6404 transitions. [2021-11-03 04:57:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:57:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 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 170 [2021-11-03 04:57:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:39,306 INFO L225 Difference]: With dead ends: 4218 [2021-11-03 04:57:39,306 INFO L226 Difference]: Without dead ends: 3109 [2021-11-03 04:57:39,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:57:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-11-03 04:57:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1343. [2021-11-03 04:57:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.548435171385991) internal successors, (2078), 1342 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 04:57:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2078 transitions. [2021-11-03 04:57:39,399 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2078 transitions. Word has length 170 [2021-11-03 04:57:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:39,399 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2078 transitions. [2021-11-03 04:57:39,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 04:57:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2078 transitions. [2021-11-03 04:57:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 04:57:39,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:39,404 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:39,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:39,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:39,626 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:57:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:39,627 INFO L85 PathProgramCache]: Analyzing trace with hash 437920303, now seen corresponding path program 1 times [2021-11-03 04:57:39,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:39,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446558951] [2021-11-03 04:57:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:39,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:39,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:39,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:57:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:41,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:41,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:41,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:41,403 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:57:41,404 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 04:57:43,201 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:57:43,201 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 04:57:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-03 04:57:43,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-03 04:57:43,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:43,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446558951] [2021-11-03 04:57:43,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446558951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:43,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:43,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:57:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197170668] [2021-11-03 04:57:43,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:57:43,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:57:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:43,902 INFO L87 Difference]: Start difference. First operand 1343 states and 2078 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 04:58:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:05,392 INFO L93 Difference]: Finished difference Result 3248 states and 5026 transitions. [2021-11-03 04:58:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:58:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 170 [2021-11-03 04:58:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:05,412 INFO L225 Difference]: With dead ends: 3248 [2021-11-03 04:58:05,412 INFO L226 Difference]: Without dead ends: 1915 [2021-11-03 04:58:05,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 334 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 04:58:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-11-03 04:58:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1595. [2021-11-03 04:58:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.5803011292346298) internal successors, (2519), 1594 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states 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 04:58:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2519 transitions. [2021-11-03 04:58:05,502 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2519 transitions. Word has length 170 [2021-11-03 04:58:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:05,502 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2519 transitions. [2021-11-03 04:58:05,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 04:58:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2519 transitions. [2021-11-03 04:58:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-03 04:58:05,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:05,508 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:58:05,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:05,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:05,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:58:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2089364194, now seen corresponding path program 1 times [2021-11-03 04:58:05,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:05,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50199999] [2021-11-03 04:58:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:05,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:05,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:05,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:05,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:58:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:07,525 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:58:07,526 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 04:58:08,139 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:58:08,140 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 04:58:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:58:08,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:58:08,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:08,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50199999] [2021-11-03 04:58:08,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50199999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:08,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:08,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:58:08,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359224850] [2021-11-03 04:58:08,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:58:08,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:58:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:58:08,786 INFO L87 Difference]: Start difference. First operand 1595 states and 2519 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 04:58:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:44,895 INFO L93 Difference]: Finished difference Result 4734 states and 7391 transitions. [2021-11-03 04:58:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:58:44,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 183 [2021-11-03 04:58:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:44,926 INFO L225 Difference]: With dead ends: 4734 [2021-11-03 04:58:44,927 INFO L226 Difference]: Without dead ends: 3149 [2021-11-03 04:58:44,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:58:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2021-11-03 04:58:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 1867. [2021-11-03 04:58:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.5819935691318328) internal successors, (2952), 1866 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states 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 04:58:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2952 transitions. [2021-11-03 04:58:45,069 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2952 transitions. Word has length 183 [2021-11-03 04:58:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:45,069 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2952 transitions. [2021-11-03 04:58:45,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 04:58:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2952 transitions. [2021-11-03 04:58:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-03 04:58:45,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:45,075 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:58:45,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:45,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:45,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:58:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1261495379, now seen corresponding path program 1 times [2021-11-03 04:58:45,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:45,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672412349] [2021-11-03 04:58:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:45,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:45,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:45,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:45,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:58:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:47,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:47,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:47,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:47,499 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:58:47,499 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 04:58:47,912 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:58:47,912 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 04:58:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:58:48,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:58:48,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:48,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672412349] [2021-11-03 04:58:48,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672412349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:48,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:48,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:58:48,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221046533] [2021-11-03 04:58:48,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:58:48,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:58:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:58:48,708 INFO L87 Difference]: Start difference. First operand 1867 states and 2952 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 04:59:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:23,309 INFO L93 Difference]: Finished difference Result 5141 states and 8023 transitions. [2021-11-03 04:59:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:59:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 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 184 [2021-11-03 04:59:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:23,329 INFO L225 Difference]: With dead ends: 5141 [2021-11-03 04:59:23,329 INFO L226 Difference]: Without dead ends: 3284 [2021-11-03 04:59:23,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:59:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-11-03 04:59:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 1975. [2021-11-03 04:59:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.5597771023302938) internal successors, (3079), 1974 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states 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 04:59:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3079 transitions. [2021-11-03 04:59:23,466 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3079 transitions. Word has length 184 [2021-11-03 04:59:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:23,467 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 3079 transitions. [2021-11-03 04:59:23,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 04:59:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3079 transitions. [2021-11-03 04:59:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-03 04:59:23,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:23,472 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:23,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:23,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:23,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1467880897, now seen corresponding path program 1 times [2021-11-03 04:59:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:23,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390027070] [2021-11-03 04:59:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:23,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:23,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:23,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:23,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:59:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:59:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:25,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:59:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:59:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:59:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:59:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:59:25,898 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:59:25,899 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 04:59:26,374 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:59:26,375 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 04:59:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:59:26,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:59:27,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:27,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390027070] [2021-11-03 04:59:27,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390027070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:27,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:27,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:59:27,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326297238] [2021-11-03 04:59:27,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:59:27,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:59:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:59:27,143 INFO L87 Difference]: Start difference. First operand 1975 states and 3079 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 04:59:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:59,669 INFO L93 Difference]: Finished difference Result 5456 states and 8421 transitions. [2021-11-03 04:59:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:59:59,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 184 [2021-11-03 04:59:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:59,687 INFO L225 Difference]: With dead ends: 5456 [2021-11-03 04:59:59,687 INFO L226 Difference]: Without dead ends: 3491 [2021-11-03 04:59:59,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:59:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2021-11-03 04:59:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 2182. [2021-11-03 04:59:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.5401192113709308) internal successors, (3359), 2181 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states 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 04:59:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 3359 transitions. [2021-11-03 04:59:59,847 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 3359 transitions. Word has length 184 [2021-11-03 04:59:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:59,848 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 3359 transitions. [2021-11-03 04:59:59,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 04:59:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 3359 transitions. [2021-11-03 04:59:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-03 04:59:59,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:59,854 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:59,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:00,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:00:00,070 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:00:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2145835448, now seen corresponding path program 1 times [2021-11-03 05:00:00,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:00,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141828361] [2021-11-03 05:00:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:00,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:00,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:00,073 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:00,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:00:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:00:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:01,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:01,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:01,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:01,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:01,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:01,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:02,164 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:00:02,165 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 05:00:03,028 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:00:03,028 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 05:00:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:00:03,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:00:03,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:03,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141828361] [2021-11-03 05:00:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141828361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:03,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:00:03,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:00:03,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801933377] [2021-11-03 05:00:03,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:00:03,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:00:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:00:03,738 INFO L87 Difference]: Start difference. First operand 2182 states and 3359 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:00:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:46,183 INFO L93 Difference]: Finished difference Result 5537 states and 8450 transitions. [2021-11-03 05:00:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:00:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-03 05:00:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:46,204 INFO L225 Difference]: With dead ends: 5537 [2021-11-03 05:00:46,204 INFO L226 Difference]: Without dead ends: 3365 [2021-11-03 05:00:46,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:00:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-11-03 05:00:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2198. [2021-11-03 05:00:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 1.5316340464269458) internal successors, (3365), 2197 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states 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 05:00:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 3365 transitions. [2021-11-03 05:00:46,387 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 3365 transitions. Word has length 184 [2021-11-03 05:00:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:46,388 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 3365 transitions. [2021-11-03 05:00:46,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:00:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 3365 transitions. [2021-11-03 05:00:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-03 05:00:46,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:46,396 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:00:46,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:46,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:00:46,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:00:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -174328440, now seen corresponding path program 1 times [2021-11-03 05:00:46,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:46,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278995105] [2021-11-03 05:00:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:46,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:46,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:46,601 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:46,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:00:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:48,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:00:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:48,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:49,037 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:00:49,038 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 05:00:49,957 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:00:49,957 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 05:00:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:00:50,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:00:50,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:50,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278995105] [2021-11-03 05:00:50,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278995105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:50,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:00:50,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:00:50,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772090568] [2021-11-03 05:00:50,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:00:50,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:00:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:00:50,722 INFO L87 Difference]: Start difference. First operand 2198 states and 3365 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 05:01:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:27,127 INFO L93 Difference]: Finished difference Result 5652 states and 8610 transitions. [2021-11-03 05:01:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:01:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 184 [2021-11-03 05:01:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:27,148 INFO L225 Difference]: With dead ends: 5652 [2021-11-03 05:01:27,149 INFO L226 Difference]: Without dead ends: 3464 [2021-11-03 05:01:27,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:01:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-03 05:01:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2252. [2021-11-03 05:01:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.5233229675699689) internal successors, (3429), 2251 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 05:01:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3429 transitions. [2021-11-03 05:01:27,375 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3429 transitions. Word has length 184 [2021-11-03 05:01:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:27,375 INFO L470 AbstractCegarLoop]: Abstraction has 2252 states and 3429 transitions. [2021-11-03 05:01:27,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 05:01:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3429 transitions. [2021-11-03 05:01:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-03 05:01:27,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:27,382 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:27,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:27,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:27,606 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:01:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:27,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1652102553, now seen corresponding path program 1 times [2021-11-03 05:01:27,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:27,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332744842] [2021-11-03 05:01:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:27,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:27,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:27,608 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:27,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:01:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:29,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:01:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:29,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:29,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:01:29,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:01:29,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:01:29,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:01:29,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:01:29,969 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:01:29,970 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 05:01:30,442 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:01:30,442 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 05:01:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:01:30,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:01:31,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:31,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332744842] [2021-11-03 05:01:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332744842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:31,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:31,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:01:31,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154144207] [2021-11-03 05:01:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:01:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:01:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:01:31,056 INFO L87 Difference]: Start difference. First operand 2252 states and 3429 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 05:02:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:06,421 INFO L93 Difference]: Finished difference Result 5755 states and 8724 transitions. [2021-11-03 05:02:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:02:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 185 [2021-11-03 05:02:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:06,446 INFO L225 Difference]: With dead ends: 5755 [2021-11-03 05:02:06,447 INFO L226 Difference]: Without dead ends: 3513 [2021-11-03 05:02:06,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:02:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-11-03 05:02:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2265. [2021-11-03 05:02:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 1.5048586572438163) internal successors, (3407), 2264 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states 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 05:02:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3407 transitions. [2021-11-03 05:02:06,621 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3407 transitions. Word has length 185 [2021-11-03 05:02:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 3407 transitions. [2021-11-03 05:02:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 05:02:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3407 transitions. [2021-11-03 05:02:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-03 05:02:06,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:06,630 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:02:06,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 05:02:06,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:06,858 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:02:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1026052826, now seen corresponding path program 1 times [2021-11-03 05:02:06,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:06,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873666672] [2021-11-03 05:02:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:06,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:06,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:06,860 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:06,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:02:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:02:09,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:09,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:09,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:09,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:09,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:09,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:09,884 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:02:09,885 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 05:02:10,553 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:02:10,554 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 05:02:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:02:10,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:02:11,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:11,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873666672] [2021-11-03 05:02:11,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873666672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:11,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:11,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:02:11,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173571915] [2021-11-03 05:02:11,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:02:11,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:02:11,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:02:11,478 INFO L87 Difference]: Start difference. First operand 2265 states and 3407 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:43,328 INFO L93 Difference]: Finished difference Result 5860 states and 8791 transitions. [2021-11-03 05:02:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:02:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-03 05:02:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:43,341 INFO L225 Difference]: With dead ends: 5860 [2021-11-03 05:02:43,341 INFO L226 Difference]: Without dead ends: 3609 [2021-11-03 05:02:43,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:02:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-11-03 05:02:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2468. [2021-11-03 05:02:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.4880421564653425) internal successors, (3671), 2467 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states 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 05:02:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3671 transitions. [2021-11-03 05:02:43,529 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3671 transitions. Word has length 186 [2021-11-03 05:02:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:43,530 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3671 transitions. [2021-11-03 05:02:43,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3671 transitions. [2021-11-03 05:02:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-03 05:02:43,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:43,537 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:02:43,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:43,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:43,750 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:02:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash 237091604, now seen corresponding path program 1 times [2021-11-03 05:02:43,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:43,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877410222] [2021-11-03 05:02:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:43,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:43,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:43,753 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:43,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:02:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:02:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:46,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:46,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:46,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:46,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:46,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:46,669 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:02:46,669 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 05:02:47,480 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:02:47,481 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 05:02:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:02:47,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:02:48,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:48,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877410222] [2021-11-03 05:02:48,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877410222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:48,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:48,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:02:48,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839021586] [2021-11-03 05:02:48,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:02:48,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:48,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:02:48,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:02:48,467 INFO L87 Difference]: Start difference. First operand 2468 states and 3671 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:20,839 INFO L93 Difference]: Finished difference Result 6108 states and 9080 transitions. [2021-11-03 05:03:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:03:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-03 05:03:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:20,852 INFO L225 Difference]: With dead ends: 6108 [2021-11-03 05:03:20,852 INFO L226 Difference]: Without dead ends: 3655 [2021-11-03 05:03:20,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:03:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-11-03 05:03:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2596. [2021-11-03 05:03:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 1.4685934489402697) internal successors, (3811), 2595 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states 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 05:03:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3811 transitions. [2021-11-03 05:03:21,030 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3811 transitions. Word has length 187 [2021-11-03 05:03:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:21,031 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3811 transitions. [2021-11-03 05:03:21,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3811 transitions. [2021-11-03 05:03:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-03 05:03:21,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:21,038 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:21,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:21,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2008453910, now seen corresponding path program 1 times [2021-11-03 05:03:21,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:21,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403190950] [2021-11-03 05:03:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:21,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:21,266 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:21,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:03:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:23,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:23,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:03:23,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:03:23,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:03:23,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:03:23,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:03:24,239 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:03:24,240 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 05:03:25,152 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:03:25,153 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 05:03:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:03:25,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:03:25,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:25,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403190950] [2021-11-03 05:03:25,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403190950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:25,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:25,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:03:25,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048114540] [2021-11-03 05:03:25,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:03:25,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:03:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:03:25,868 INFO L87 Difference]: Start difference. First operand 2596 states and 3811 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 05:03:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:59,157 INFO L93 Difference]: Finished difference Result 6072 states and 8928 transitions. [2021-11-03 05:03:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:03:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 187 [2021-11-03 05:03:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:59,175 INFO L225 Difference]: With dead ends: 6072 [2021-11-03 05:03:59,176 INFO L226 Difference]: Without dead ends: 3782 [2021-11-03 05:03:59,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:03:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-11-03 05:03:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 2775. [2021-11-03 05:03:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 1.4513338139870224) internal successors, (4026), 2774 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states 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 05:03:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 4026 transitions. [2021-11-03 05:03:59,374 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 4026 transitions. Word has length 187 [2021-11-03 05:03:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:59,374 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 4026 transitions. [2021-11-03 05:03:59,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 05:03:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 4026 transitions. [2021-11-03 05:03:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:03:59,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:59,381 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:59,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:59,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:59,602 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 462252043, now seen corresponding path program 1 times [2021-11-03 05:03:59,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:59,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599289302] [2021-11-03 05:03:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:59,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:59,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:59,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:04:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:01,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:01,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:02,219 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:04:02,219 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 56 treesize of output 74 [2021-11-03 05:04:03,074 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:04:03,074 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 05:04:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:04:03,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:04:03,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:03,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599289302] [2021-11-03 05:04:03,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599289302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:03,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:03,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:04:03,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833181416] [2021-11-03 05:04:03,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:04:03,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:04:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:04:03,768 INFO L87 Difference]: Start difference. First operand 2775 states and 4026 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:39,645 INFO L93 Difference]: Finished difference Result 6425 states and 9334 transitions. [2021-11-03 05:04:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:04:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 188 [2021-11-03 05:04:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:39,658 INFO L225 Difference]: With dead ends: 6425 [2021-11-03 05:04:39,659 INFO L226 Difference]: Without dead ends: 3976 [2021-11-03 05:04:39,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:04:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-11-03 05:04:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 2969. [2021-11-03 05:04:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2968 states have (on average 1.434299191374663) internal successors, (4257), 2968 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 4257 transitions. [2021-11-03 05:04:40,043 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 4257 transitions. Word has length 188 [2021-11-03 05:04:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:40,043 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 4257 transitions. [2021-11-03 05:04:40,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 4257 transitions. [2021-11-03 05:04:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-03 05:04:40,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:40,051 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:40,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:40,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:40,270 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:04:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 993833957, now seen corresponding path program 1 times [2021-11-03 05:04:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:40,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572522421] [2021-11-03 05:04:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:40,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:40,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:40,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:04:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:42,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:42,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:43,360 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:04:43,361 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 05:04:44,498 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:04:44,499 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 107 treesize of output 35 [2021-11-03 05:04:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:04:44,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:04:45,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:45,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572522421] [2021-11-03 05:04:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572522421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:45,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:45,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:04:45,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528414432] [2021-11-03 05:04:45,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:04:45,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:04:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:04:45,366 INFO L87 Difference]: Start difference. First operand 2969 states and 4257 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:05:21,711 INFO L93 Difference]: Finished difference Result 6746 states and 9701 transitions. [2021-11-03 05:05:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:05:21,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-03 05:05:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:05:21,719 INFO L225 Difference]: With dead ends: 6746 [2021-11-03 05:05:21,719 INFO L226 Difference]: Without dead ends: 4130 [2021-11-03 05:05:21,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:05:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2021-11-03 05:05:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 3166. [2021-11-03 05:05:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3166 states, 3165 states have (on average 1.4186413902053712) internal successors, (4490), 3165 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 4490 transitions. [2021-11-03 05:05:21,985 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 4490 transitions. Word has length 189 [2021-11-03 05:05:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:05:21,986 INFO L470 AbstractCegarLoop]: Abstraction has 3166 states and 4490 transitions. [2021-11-03 05:05:21,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 4490 transitions. [2021-11-03 05:05:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-03 05:05:21,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:05:21,992 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:05:22,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:05:22,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:05:22,212 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:05:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:05:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1722993591, now seen corresponding path program 1 times [2021-11-03 05:05:22,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:05:22,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16941531] [2021-11-03 05:05:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:05:22,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:05:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:05:22,217 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:05:22,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:05:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:05:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:05:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:05:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:25,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:25,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:25,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:25,487 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:05:25,487 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 05:05:26,705 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:05:26,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:05:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:05:26,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:05:27,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:27,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16941531] [2021-11-03 05:05:27,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16941531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:27,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:27,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:05:27,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067945745] [2021-11-03 05:05:27,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:05:27,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:05:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:05:27,596 INFO L87 Difference]: Start difference. First operand 3166 states and 4490 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 05:06:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:01,689 INFO L93 Difference]: Finished difference Result 7440 states and 10584 transitions. [2021-11-03 05:06:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:06:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 192 [2021-11-03 05:06:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:01,700 INFO L225 Difference]: With dead ends: 7440 [2021-11-03 05:06:01,700 INFO L226 Difference]: Without dead ends: 4295 [2021-11-03 05:06:01,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:06:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-11-03 05:06:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 3350. [2021-11-03 05:06:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.4045983875783816) internal successors, (4704), 3349 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states 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 05:06:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4704 transitions. [2021-11-03 05:06:02,015 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4704 transitions. Word has length 192 [2021-11-03 05:06:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:02,015 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 4704 transitions. [2021-11-03 05:06:02,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 05:06:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4704 transitions. [2021-11-03 05:06:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-03 05:06:02,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:02,034 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:02,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:06:02,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:06:02,235 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:02,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:02,235 INFO L85 PathProgramCache]: Analyzing trace with hash -459825679, now seen corresponding path program 1 times [2021-11-03 05:06:02,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:06:02,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701834712] [2021-11-03 05:06:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:02,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:06:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:06:02,237 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:06:02,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:06:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:06:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:06:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:04,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:04,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:04,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:05,303 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:06:05,303 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 05:06:06,301 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:06:06,302 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 05:06:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:06:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:06:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:06:07,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:06:07,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701834712] [2021-11-03 05:06:07,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701834712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:07,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:07,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:06:07,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111380833] [2021-11-03 05:06:07,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:06:07,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:06:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:06:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:06:07,011 INFO L87 Difference]: Start difference. First operand 3350 states and 4704 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 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) [2021-11-03 05:06:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:31,419 INFO L93 Difference]: Finished difference Result 7570 states and 10696 transitions. [2021-11-03 05:06:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:06:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 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) Word has length 193 [2021-11-03 05:06:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:31,424 INFO L225 Difference]: With dead ends: 7570 [2021-11-03 05:06:31,425 INFO L226 Difference]: Without dead ends: 4241 [2021-11-03 05:06:31,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:06:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-11-03 05:06:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3358. [2021-11-03 05:06:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3358 states, 3357 states have (on average 1.3982722669049747) internal successors, (4694), 3357 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states 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 05:06:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 4694 transitions. [2021-11-03 05:06:31,651 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 4694 transitions. Word has length 193 [2021-11-03 05:06:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:31,651 INFO L470 AbstractCegarLoop]: Abstraction has 3358 states and 4694 transitions. [2021-11-03 05:06:31,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 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) [2021-11-03 05:06:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 4694 transitions. [2021-11-03 05:06:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-03 05:06:31,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:31,657 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:31,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:06:31,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:06:31,878 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1522578341, now seen corresponding path program 1 times [2021-11-03 05:06:31,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:06:31,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131824081] [2021-11-03 05:06:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:31,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:06:31,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:06:31,881 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:06:31,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:06:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:06:34,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:06:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:34,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:34,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:34,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:34,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:35,291 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:06:35,291 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 05:06:36,772 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:06:36,773 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 05:06:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:06:37,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:06:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:06:37,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:06:37,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131824081] [2021-11-03 05:06:37,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131824081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:37,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:37,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:06:37,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423297910] [2021-11-03 05:06:37,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:06:37,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:06:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:06:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:06:37,719 INFO L87 Difference]: Start difference. First operand 3358 states and 4694 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 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 05:07:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:07,185 INFO L93 Difference]: Finished difference Result 7529 states and 10596 transitions. [2021-11-03 05:07:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:07:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 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 193 [2021-11-03 05:07:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:07,191 INFO L225 Difference]: With dead ends: 7529 [2021-11-03 05:07:07,191 INFO L226 Difference]: Without dead ends: 4192 [2021-11-03 05:07:07,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:07:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2021-11-03 05:07:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 3375. [2021-11-03 05:07:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3375 states, 3374 states have (on average 1.3959691760521635) internal successors, (4710), 3374 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states 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 05:07:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 4710 transitions. [2021-11-03 05:07:07,437 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 4710 transitions. Word has length 193 [2021-11-03 05:07:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:07,438 INFO L470 AbstractCegarLoop]: Abstraction has 3375 states and 4710 transitions. [2021-11-03 05:07:07,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 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 05:07:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 4710 transitions. [2021-11-03 05:07:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-03 05:07:07,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:07,443 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:07,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:07,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:07:07,666 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash -424111708, now seen corresponding path program 1 times [2021-11-03 05:07:07,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:07:07,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261762373] [2021-11-03 05:07:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:07,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:07:07,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:07:07,669 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:07:07,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe42b9df-d26a-403c-82cb-e9c733837bff/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:07:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:07:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:10,580 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 162 treesize of output 138 [2021-11-03 05:07:10,586 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 138 treesize of output 90 [2021-11-03 05:07:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:10,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:10,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:10,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:10,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:10,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:10,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver