./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/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_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/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_c4204ece-923b-45d1-a2da-f3a4db3239c0/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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:10,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:10,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:10,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:10,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:10,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:10,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:10,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:10,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:10,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:10,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:10,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:10,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:10,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:10,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:10,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:10,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:10,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:10,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:10,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:10,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:10,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:10,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:10,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:10,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:10,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:10,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:10,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:10,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:10,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:10,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:10,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:10,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:10,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:10,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:10,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:10,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:10,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:10,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:10,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:10,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:10,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:21:10,218 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:10,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:10,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:10,221 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:10,222 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:10,222 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:10,222 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:21:10,222 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:10,222 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:10,223 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:21:10,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:21:10,224 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:10,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:21:10,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:21:10,225 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:21:10,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:10,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:10,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:21:10,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:10,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:10,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:21:10,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:10,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:21:10,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:10,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:10,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:21:10,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:10,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:21:10,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:10,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:10,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:10,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:10,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:10,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:21:10,232 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:21:10,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:21:10,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:21:10,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:10,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:10,233 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-03 04:21:10,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:10,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:10,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:10,567 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:10,567 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:10,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-03 04:21:10,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/eb1dec6f3/3db776439bf44e25aa67f854be5d00f6/FLAG7e21d3c15 [2021-11-03 04:21:11,320 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:11,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-03 04:21:11,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/eb1dec6f3/3db776439bf44e25aa67f854be5d00f6/FLAG7e21d3c15 [2021-11-03 04:21:11,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/eb1dec6f3/3db776439bf44e25aa67f854be5d00f6 [2021-11-03 04:21:11,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:11,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:11,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:11,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:11,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:11,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:11" (1/1) ... [2021-11-03 04:21:11,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af4464e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:11, skipping insertion in model container [2021-11-03 04:21:11,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:11" (1/1) ... [2021-11-03 04:21:11,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:11,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:12,111 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-03 04:21:12,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:12,136 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 04:21:12,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@226fa9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:12, skipping insertion in model container [2021-11-03 04:21:12,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:12,137 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:21:12,139 INFO L168 Benchmark]: Toolchain (without parser) took 611.47 ms. Allocated memory is still 98.6 MB. Free memory was 55.4 MB in the beginning and 65.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:21:12,140 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 98.6 MB. Free memory is still 74.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:21:12,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 605.99 ms. Allocated memory is still 98.6 MB. Free memory was 55.2 MB in the beginning and 65.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:21:12,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 98.6 MB. Free memory is still 74.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 605.99 ms. Allocated memory is still 98.6 MB. Free memory was 55.2 MB in the beginning and 65.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 4.8 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/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_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/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_c4204ece-923b-45d1-a2da-f3a4db3239c0/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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:14,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:14,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:14,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:14,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:14,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:14,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:14,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:14,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:14,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:14,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:14,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:14,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:14,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:14,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:14,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:14,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:14,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:14,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:14,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:14,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:14,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:14,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:14,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:14,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:14,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:14,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:14,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:14,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:14,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:14,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:14,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:14,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:14,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:14,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:14,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:14,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:14,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:14,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:14,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:14,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:14,476 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:21:14,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:14,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:14,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:14,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:14,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:14,519 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:14,520 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:14,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:14,520 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:14,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:14,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:14,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:14,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:14,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:21:14,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:14,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:21:14,524 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:14,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:21:14,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:21:14,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:14,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:21:14,525 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:14,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:21:14,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:14,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:21:14,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:14,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:14,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:14,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:14,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:21:14,526 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:21:14,527 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:14,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:21:14,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:14,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:14,528 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-03 04:21:14,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:14,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:14,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:14,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:14,988 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:14,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-03 04:21:15,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/c1f9ed644/383cd1b3e07f4e3aa5260c02f41501dd/FLAGb5fba7130 [2021-11-03 04:21:15,704 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:15,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-03 04:21:15,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/c1f9ed644/383cd1b3e07f4e3aa5260c02f41501dd/FLAGb5fba7130 [2021-11-03 04:21:15,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/data/c1f9ed644/383cd1b3e07f4e3aa5260c02f41501dd [2021-11-03 04:21:15,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:15,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:15,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:15,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:15,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:15,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:15" (1/1) ... [2021-11-03 04:21:15,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b30a4a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:15, skipping insertion in model container [2021-11-03 04:21:15,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:15" (1/1) ... [2021-11-03 04:21:15,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:16,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:16,519 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-03 04:21:16,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:16,550 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:21:16,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:16,717 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-03 04:21:16,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:16,728 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:21:16,834 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_c4204ece-923b-45d1-a2da-f3a4db3239c0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-03 04:21:16,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:16,854 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:21:16,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16 WrapperNode [2021-11-03 04:21:16,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:16,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:16,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:21:16,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:21:16,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:16,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:16,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:16,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:21:16,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:21:16,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:21:16,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:16,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:16,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:17,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:17,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:17,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:17,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:17,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:21:17,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:21:17,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:21:17,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:21:17,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (1/1) ... [2021-11-03 04:21:17,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:17,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:17,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:21:17,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:21:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:21:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:21:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:21:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:21:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:21:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:21:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:21:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:21:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:21:17,439 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:21:25,215 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:21:25,215 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:21:25,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:21:25,224 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:21:25,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:21:25 BoogieIcfgContainer [2021-11-03 04:21:25,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:21:25,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:21:25,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:21:25,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:21:25,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:21:15" (1/3) ... [2021-11-03 04:21:25,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acc52f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:21:25, skipping insertion in model container [2021-11-03 04:21:25,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:16" (2/3) ... [2021-11-03 04:21:25,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acc52f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:21:25, skipping insertion in model container [2021-11-03 04:21:25,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:21:25" (3/3) ... [2021-11-03 04:21:25,235 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.01.i.cil-1.c [2021-11-03 04:21:25,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:21:25,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:21:25,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:21:25,317 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 04:21:25,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:21:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 04:21:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:21:25,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:25,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:25,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:21:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1383952291, now seen corresponding path program 1 times [2021-11-03 04:21:25,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:25,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156083166] [2021-11-03 04:21:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:25,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:25,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:25,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:25,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:21:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:21:25,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:26,130 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 04:21:26,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:26,469 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 04:21:26,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:26,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156083166] [2021-11-03 04:21:26,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156083166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:26,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:26,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:21:26,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657534548] [2021-11-03 04:21:26,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:21:26,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:21:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:21:26,502 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 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 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 04:21:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:26,705 INFO L93 Difference]: Finished difference Result 553 states and 933 transitions. [2021-11-03 04:21:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:21:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:21:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:26,730 INFO L225 Difference]: With dead ends: 553 [2021-11-03 04:21:26,731 INFO L226 Difference]: Without dead ends: 377 [2021-11-03 04:21:26,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:21:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-03 04:21:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-03 04:21:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.5186170212765957) internal successors, (571), 376 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 04:21:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 571 transitions. [2021-11-03 04:21:26,831 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 571 transitions. Word has length 48 [2021-11-03 04:21:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:26,832 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 571 transitions. [2021-11-03 04:21:26,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 04:21:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 571 transitions. [2021-11-03 04:21:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-03 04:21:26,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:26,845 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:21:26,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:27,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:27,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:21:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash -511791490, now seen corresponding path program 1 times [2021-11-03 04:21:27,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:27,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851864874] [2021-11-03 04:21:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:27,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:27,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:27,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:27,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:21:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:27,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:21:27,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:27,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:21:28,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:28,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851864874] [2021-11-03 04:21:28,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851864874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:28,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:28,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:21:28,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346050198] [2021-11-03 04:21:28,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:21:28,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:21:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:21:28,283 INFO L87 Difference]: Start difference. First operand 377 states and 571 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 04:21:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:28,499 INFO L93 Difference]: Finished difference Result 860 states and 1312 transitions. [2021-11-03 04:21:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:21:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 108 [2021-11-03 04:21:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:28,504 INFO L225 Difference]: With dead ends: 860 [2021-11-03 04:21:28,504 INFO L226 Difference]: Without dead ends: 614 [2021-11-03 04:21:28,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 212 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 04:21:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-03 04:21:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-03 04:21:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.5154975530179446) internal successors, (929), 613 states have internal predecessors, (929), 0 states have call successors, (0), 0 states 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 04:21:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 929 transitions. [2021-11-03 04:21:28,532 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 929 transitions. Word has length 108 [2021-11-03 04:21:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:28,533 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 929 transitions. [2021-11-03 04:21:28,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 04:21:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 929 transitions. [2021-11-03 04:21:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-03 04:21:28,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:28,536 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:21:28,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:28,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:28,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:21:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -868750118, now seen corresponding path program 1 times [2021-11-03 04:21:28,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:28,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124330910] [2021-11-03 04:21:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:28,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:28,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:28,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:21:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:21:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-03 04:21:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-03 04:21:30,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:30,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124330910] [2021-11-03 04:21:30,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124330910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:30,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:30,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:21:30,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892490111] [2021-11-03 04:21:30,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:21:30,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:21:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:21:30,407 INFO L87 Difference]: Start difference. First operand 614 states and 929 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 04:21:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:30,718 INFO L93 Difference]: Finished difference Result 1336 states and 2029 transitions. [2021-11-03 04:21:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:21:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 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 169 [2021-11-03 04:21:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:30,724 INFO L225 Difference]: With dead ends: 1336 [2021-11-03 04:21:30,724 INFO L226 Difference]: Without dead ends: 853 [2021-11-03 04:21:30,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 334 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 04:21:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-03 04:21:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-03 04:21:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.511737089201878) internal successors, (1288), 852 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states 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 04:21:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1288 transitions. [2021-11-03 04:21:30,761 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1288 transitions. Word has length 169 [2021-11-03 04:21:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:30,762 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1288 transitions. [2021-11-03 04:21:30,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 04:21:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1288 transitions. [2021-11-03 04:21:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-03 04:21:30,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:30,774 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-03 04:21:30,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:30,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:30,986 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:21:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -438302228, now seen corresponding path program 1 times [2021-11-03 04:21:30,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:30,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435585760] [2021-11-03 04:21:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:30,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:30,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:30,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:21:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:21:31,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:31,910 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 04:21:31,920 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 04:21:32,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:32,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-03 04:21:32,025 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 169 treesize of output 158 [2021-11-03 04:21:32,500 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:21:32,501 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 469 treesize of output 441 [2021-11-03 04:21:32,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:32,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-03 04:21:32,587 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 169 treesize of output 158 [2021-11-03 04:21:32,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,708 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 77 treesize of output 49 [2021-11-03 04:21:32,831 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:21:32,831 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 04:21:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:32,874 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 04:21:32,908 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 04:21:32,915 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 04:21:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-03 04:21:33,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:34,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:34,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:21:34,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:34,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:21:34,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:34,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-03 04:21:34,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:34,464 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 404 [2021-11-03 04:21:34,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:34,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 461 [2021-11-03 04:21:34,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:21:34,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 578 [2021-11-03 04:21:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-03 04:21:34,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:34,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435585760] [2021-11-03 04:21:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435585760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:34,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:21:34,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795470033] [2021-11-03 04:21:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:21:34,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:21:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:21:34,783 INFO L87 Difference]: Start difference. First operand 853 states and 1288 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:21:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:54,567 INFO L93 Difference]: Finished difference Result 1703 states and 2572 transitions. [2021-11-03 04:21:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:21:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 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 210 [2021-11-03 04:21:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:54,574 INFO L225 Difference]: With dead ends: 1703 [2021-11-03 04:21:54,575 INFO L226 Difference]: Without dead ends: 853 [2021-11-03 04:21:54,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 411 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 04:21:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-03 04:21:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-03 04:21:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.5105633802816902) internal successors, (1287), 852 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states 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 04:21:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1287 transitions. [2021-11-03 04:21:54,623 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1287 transitions. Word has length 210 [2021-11-03 04:21:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:54,623 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1287 transitions. [2021-11-03 04:21:54,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:21:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1287 transitions. [2021-11-03 04:21:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-03 04:21:54,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:54,628 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-03 04:21:54,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:21:54,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:54,849 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:21:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1311967830, now seen corresponding path program 1 times [2021-11-03 04:21:54,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:54,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846071282] [2021-11-03 04:21:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:54,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:54,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:54,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:21:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:21:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:56,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:56,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:56,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:56,305 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:21:56,306 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 38 [2021-11-03 04:21:56,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:56,747 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:21:56,747 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 70 treesize of output 87 [2021-11-03 04:21:58,294 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:21:58,295 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 108 treesize of output 36 [2021-11-03 04:21:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-03 04:21:58,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-03 04:22:00,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:00,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846071282] [2021-11-03 04:22:00,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846071282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:00,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:00,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:22:00,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405290829] [2021-11-03 04:22:00,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:22:00,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:22:00,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:22:00,074 INFO L87 Difference]: Start difference. First operand 853 states and 1287 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 04:22:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:14,707 INFO L93 Difference]: Finished difference Result 2002 states and 3019 transitions. [2021-11-03 04:22:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:22:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 210 [2021-11-03 04:22:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:14,716 INFO L225 Difference]: With dead ends: 2002 [2021-11-03 04:22:14,717 INFO L226 Difference]: Without dead ends: 1159 [2021-11-03 04:22:14,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 412 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-03 04:22:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1003. [2021-11-03 04:22:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.5419161676646707) internal successors, (1545), 1002 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states 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 04:22:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1545 transitions. [2021-11-03 04:22:14,783 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1545 transitions. Word has length 210 [2021-11-03 04:22:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:14,784 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1545 transitions. [2021-11-03 04:22:14,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 04:22:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1545 transitions. [2021-11-03 04:22:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-03 04:22:14,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:14,789 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-03 04:22:14,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:15,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:15,010 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:22:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash 95758120, now seen corresponding path program 1 times [2021-11-03 04:22:15,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:15,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732153250] [2021-11-03 04:22:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:15,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:15,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:15,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:15,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:22:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:16,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:16,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:16,860 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:22:16,861 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 76 [2021-11-03 04:22:19,285 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:22:19,286 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 109 treesize of output 37 [2021-11-03 04:22:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:22:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:22:20,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:20,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732153250] [2021-11-03 04:22:20,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732153250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:20,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:20,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:22:20,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756307749] [2021-11-03 04:22:20,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:20,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:20,293 INFO L87 Difference]: Start difference. First operand 1003 states and 1545 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 04:22:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:58,439 INFO L93 Difference]: Finished difference Result 3404 states and 5227 transitions. [2021-11-03 04:22:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:22:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 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 210 [2021-11-03 04:22:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:58,458 INFO L225 Difference]: With dead ends: 3404 [2021-11-03 04:22:58,458 INFO L226 Difference]: Without dead ends: 2411 [2021-11-03 04:22:58,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 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 04:22:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-11-03 04:22:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1282. [2021-11-03 04:22:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.604215456674473) internal successors, (2055), 1281 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states 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 04:22:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2055 transitions. [2021-11-03 04:22:58,544 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2055 transitions. Word has length 210 [2021-11-03 04:22:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:58,544 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 2055 transitions. [2021-11-03 04:22:58,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 04:22:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2055 transitions. [2021-11-03 04:22:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-03 04:22:58,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:58,550 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-03 04:22:58,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:58,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:58,774 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:22:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash -149215637, now seen corresponding path program 1 times [2021-11-03 04:22:58,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:58,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790161627] [2021-11-03 04:22:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:58,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:58,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:58,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:58,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:23:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:23:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:00,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:00,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:00,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:00,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:00,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:00,786 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:23:00,786 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 76 [2021-11-03 04:23:03,372 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:23:03,372 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 109 treesize of output 37 [2021-11-03 04:23:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:23:03,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:23:04,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:04,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790161627] [2021-11-03 04:23:04,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790161627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:04,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:04,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:23:04,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422677472] [2021-11-03 04:23:04,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:23:04,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:23:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:23:04,493 INFO L87 Difference]: Start difference. First operand 1282 states and 2055 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 04:23:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:45,075 INFO L93 Difference]: Finished difference Result 3934 states and 6207 transitions. [2021-11-03 04:23:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:23:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 211 [2021-11-03 04:23:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:45,095 INFO L225 Difference]: With dead ends: 3934 [2021-11-03 04:23:45,095 INFO L226 Difference]: Without dead ends: 2662 [2021-11-03 04:23:45,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 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 04:23:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-11-03 04:23:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1562. [2021-11-03 04:23:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 1.6483023702754644) internal successors, (2573), 1561 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states 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 04:23:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2573 transitions. [2021-11-03 04:23:45,209 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2573 transitions. Word has length 211 [2021-11-03 04:23:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:45,210 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 2573 transitions. [2021-11-03 04:23:45,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 04:23:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2573 transitions. [2021-11-03 04:23:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-03 04:23:45,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:45,218 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-11-03 04:23:45,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:45,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:45,434 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:23:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -299491700, now seen corresponding path program 1 times [2021-11-03 04:23:45,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:45,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603393856] [2021-11-03 04:23:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:45,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:45,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:45,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:45,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:23:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:23:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:47,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:47,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:47,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:47,882 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:23:47,882 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 76 [2021-11-03 04:23:49,901 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:23:49,901 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 109 treesize of output 37 [2021-11-03 04:23:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-03 04:23:50,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-03 04:23:51,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:51,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603393856] [2021-11-03 04:23:51,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603393856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:51,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:51,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:23:51,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220920990] [2021-11-03 04:23:51,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:23:51,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:23:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:23:51,253 INFO L87 Difference]: Start difference. First operand 1562 states and 2573 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 04:24:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:33,767 INFO L93 Difference]: Finished difference Result 4592 states and 7463 transitions. [2021-11-03 04:24:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:24:33,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 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 240 [2021-11-03 04:24:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:33,786 INFO L225 Difference]: With dead ends: 4592 [2021-11-03 04:24:33,786 INFO L226 Difference]: Without dead ends: 3040 [2021-11-03 04:24:33,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 474 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 04:24:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-11-03 04:24:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 1978. [2021-11-03 04:24:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.682346990389479) internal successors, (3326), 1977 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states 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 04:24:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3326 transitions. [2021-11-03 04:24:33,908 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3326 transitions. Word has length 240 [2021-11-03 04:24:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:33,909 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3326 transitions. [2021-11-03 04:24:33,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 04:24:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3326 transitions. [2021-11-03 04:24:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-03 04:24:33,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:33,916 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-03 04:24:33,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:24:34,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:24:34,129 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:24:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash -961340692, now seen corresponding path program 1 times [2021-11-03 04:24:34,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:24:34,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670844196] [2021-11-03 04:24:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:34,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:24:34,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:24:34,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:24:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:24:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:24:36,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:36,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:36,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:36,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:36,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:36,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:36,799 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:24:36,800 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 76 [2021-11-03 04:24:39,276 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:24:39,277 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 109 treesize of output 37 [2021-11-03 04:24:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-03 04:24:39,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-03 04:24:40,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:24:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670844196] [2021-11-03 04:24:40,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670844196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:40,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:40,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:24:40,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682969032] [2021-11-03 04:24:40,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:24:40,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:24:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:24:40,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:24:40,508 INFO L87 Difference]: Start difference. First operand 1978 states and 3326 transitions. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 04:25:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:19,449 INFO L93 Difference]: Finished difference Result 5302 states and 8686 transitions. [2021-11-03 04:25:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:25:19,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 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 244 [2021-11-03 04:25:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:19,476 INFO L225 Difference]: With dead ends: 5302 [2021-11-03 04:25:19,476 INFO L226 Difference]: Without dead ends: 3334 [2021-11-03 04:25:19,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 482 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 04:25:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-11-03 04:25:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2237. [2021-11-03 04:25:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 1.6940966010733454) internal successors, (3788), 2236 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states 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 04:25:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3788 transitions. [2021-11-03 04:25:19,629 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3788 transitions. Word has length 244 [2021-11-03 04:25:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:19,630 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 3788 transitions. [2021-11-03 04:25:19,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 04:25:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3788 transitions. [2021-11-03 04:25:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-03 04:25:19,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:19,640 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-03 04:25:19,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:19,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:25:19,867 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:25:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash 434387151, now seen corresponding path program 1 times [2021-11-03 04:25:19,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:19,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454774626] [2021-11-03 04:25:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:19,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:19,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:19,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:25:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:25:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:25:21,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:25:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:25:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:25:21,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:25:21,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:25:22,318 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:25:22,319 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 76 [2021-11-03 04:25:25,034 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:25:25,034 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 109 treesize of output 37 [2021-11-03 04:25:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-03 04:25:25,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-03 04:25:26,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:26,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454774626] [2021-11-03 04:25:26,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454774626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:26,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:26,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:25:26,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854851102] [2021-11-03 04:25:26,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:25:26,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:25:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:25:26,383 INFO L87 Difference]: Start difference. First operand 2237 states and 3788 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 04:26:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:11,051 INFO L93 Difference]: Finished difference Result 5528 states and 9088 transitions. [2021-11-03 04:26:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:26:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 245 [2021-11-03 04:26:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:11,069 INFO L225 Difference]: With dead ends: 5528 [2021-11-03 04:26:11,070 INFO L226 Difference]: Without dead ends: 3301 [2021-11-03 04:26:11,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 484 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 04:26:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2021-11-03 04:26:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2237. [2021-11-03 04:26:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 1.68783542039356) internal successors, (3774), 2236 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states 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 04:26:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3774 transitions. [2021-11-03 04:26:11,244 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3774 transitions. Word has length 245 [2021-11-03 04:26:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:11,245 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 3774 transitions. [2021-11-03 04:26:11,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 04:26:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3774 transitions. [2021-11-03 04:26:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-03 04:26:11,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:11,253 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-11-03 04:26:11,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:11,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:11,470 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:26:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1190000932, now seen corresponding path program 1 times [2021-11-03 04:26:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:11,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373461285] [2021-11-03 04:26:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:11,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:11,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:11,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:11,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:26:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:14,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:26:14,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:26:14,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:26:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:26:14,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:26:14,899 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:26:14,899 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 76 [2021-11-03 04:26:15,864 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:26:15,865 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 109 treesize of output 37 [2021-11-03 04:26:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-03 04:26:16,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-03 04:26:17,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:17,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373461285] [2021-11-03 04:26:17,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373461285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:17,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:17,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:26:17,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363500314] [2021-11-03 04:26:17,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:26:17,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:26:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:26:17,282 INFO L87 Difference]: Start difference. First operand 2237 states and 3774 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:02,562 INFO L93 Difference]: Finished difference Result 5808 states and 9544 transitions. [2021-11-03 04:27:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:27:02,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-03 04:27:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:02,584 INFO L225 Difference]: With dead ends: 5808 [2021-11-03 04:27:02,584 INFO L226 Difference]: Without dead ends: 3581 [2021-11-03 04:27:02,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 500 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 04:27:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2021-11-03 04:27:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 2349. [2021-11-03 04:27:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 1.6707836456558773) internal successors, (3923), 2348 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states 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 04:27:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3923 transitions. [2021-11-03 04:27:02,745 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3923 transitions. Word has length 253 [2021-11-03 04:27:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:02,746 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3923 transitions. [2021-11-03 04:27:02,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3923 transitions. [2021-11-03 04:27:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-03 04:27:02,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:02,753 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-03 04:27:02,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:02,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,979 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:27:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2046774459, now seen corresponding path program 1 times [2021-11-03 04:27:02,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:02,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81866521] [2021-11-03 04:27:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:02,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:02,981 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:02,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:27:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:27:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:27:05,555 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:27:05,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:27:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:27:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:27:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:27:06,020 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:27:06,021 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 70 treesize of output 87 [2021-11-03 04:27:08,823 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:27:08,824 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 108 treesize of output 36 [2021-11-03 04:27:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-03 04:27:08,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-03 04:27:09,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:09,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81866521] [2021-11-03 04:27:09,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81866521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:09,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:09,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:27:09,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384754952] [2021-11-03 04:27:09,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:27:09,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:09,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:27:09,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:27:09,759 INFO L87 Difference]: Start difference. First operand 2349 states and 3923 transitions. Second operand has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 04:27:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:58,937 INFO L93 Difference]: Finished difference Result 6877 states and 11142 transitions. [2021-11-03 04:27:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:27:58,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 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 254 [2021-11-03 04:27:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:58,967 INFO L225 Difference]: With dead ends: 6877 [2021-11-03 04:27:58,968 INFO L226 Difference]: Without dead ends: 4538 [2021-11-03 04:27:58,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:27:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-11-03 04:27:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2842. [2021-11-03 04:27:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 1.6860260471664907) internal successors, (4790), 2841 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states 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 04:27:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 4790 transitions. [2021-11-03 04:27:59,195 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 4790 transitions. Word has length 254 [2021-11-03 04:27:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:59,196 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 4790 transitions. [2021-11-03 04:27:59,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 04:27:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 4790 transitions. [2021-11-03 04:27:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-03 04:27:59,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:59,206 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-03 04:27:59,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:59,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:59,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:27:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1562207625, now seen corresponding path program 1 times [2021-11-03 04:27:59,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:59,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380979431] [2021-11-03 04:27:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:59,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:59,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:59,427 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:59,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:28:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:28:02,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:02,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:02,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:02,610 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:28:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:28:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:03,199 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:28:03,200 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 70 treesize of output 87 [2021-11-03 04:28:06,143 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:28:06,144 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 108 treesize of output 36 [2021-11-03 04:28:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-03 04:28:06,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-03 04:28:07,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:07,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380979431] [2021-11-03 04:28:07,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380979431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:07,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:07,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:28:07,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840651617] [2021-11-03 04:28:07,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:28:07,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:28:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:28:07,389 INFO L87 Difference]: Start difference. First operand 2842 states and 4790 transitions. Second operand has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 04:29:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:15,968 INFO L93 Difference]: Finished difference Result 7339 states and 11977 transitions. [2021-11-03 04:29:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:29:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 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 256 [2021-11-03 04:29:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:15,980 INFO L225 Difference]: With dead ends: 7339 [2021-11-03 04:29:15,980 INFO L226 Difference]: Without dead ends: 4467 [2021-11-03 04:29:15,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:29:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-11-03 04:29:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 2856. [2021-11-03 04:29:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 1.6851138353765325) internal successors, (4811), 2855 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states 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 04:29:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4811 transitions. [2021-11-03 04:29:16,195 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4811 transitions. Word has length 256 [2021-11-03 04:29:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:16,195 INFO L470 AbstractCegarLoop]: Abstraction has 2856 states and 4811 transitions. [2021-11-03 04:29:16,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 04:29:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4811 transitions. [2021-11-03 04:29:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-03 04:29:16,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:16,205 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2021-11-03 04:29:16,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:16,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:16,431 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:29:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash -853098811, now seen corresponding path program 1 times [2021-11-03 04:29:16,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:16,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746530526] [2021-11-03 04:29:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:16,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:16,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:16,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:29:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:29:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:20,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:20,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:20,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:20,258 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:29:20,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:29:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:20,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:20,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:20,723 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:29:20,723 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 70 treesize of output 87 [2021-11-03 04:29:21,621 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:29:21,621 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 108 treesize of output 36 [2021-11-03 04:29:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-03 04:29:21,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-03 04:29:22,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:22,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746530526] [2021-11-03 04:29:22,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746530526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:22,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:22,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:29:22,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989097625] [2021-11-03 04:29:22,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:29:22,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:29:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:29:22,843 INFO L87 Difference]: Start difference. First operand 2856 states and 4811 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 04:30:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:04,872 INFO L93 Difference]: Finished difference Result 7581 states and 12416 transitions. [2021-11-03 04:30:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:30:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 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 282 [2021-11-03 04:30:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:04,881 INFO L225 Difference]: With dead ends: 7581 [2021-11-03 04:30:04,881 INFO L226 Difference]: Without dead ends: 4735 [2021-11-03 04:30:04,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 556 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:30:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-11-03 04:30:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 2975. [2021-11-03 04:30:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 1.6657700067249495) internal successors, (4954), 2974 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states 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 04:30:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 4954 transitions. [2021-11-03 04:30:05,049 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 4954 transitions. Word has length 282 [2021-11-03 04:30:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:05,050 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 4954 transitions. [2021-11-03 04:30:05,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 04:30:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 4954 transitions. [2021-11-03 04:30:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-03 04:30:05,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:05,058 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:05,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:05,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:05,282 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:30:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1787837157, now seen corresponding path program 1 times [2021-11-03 04:30:05,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:05,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441096784] [2021-11-03 04:30:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:05,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:05,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:05,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:30:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:30:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:11,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:11,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:11,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:11,325 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:30:11,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:30:11,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:11,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:11,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:11,852 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:30:11,852 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 70 treesize of output 87 [2021-11-03 04:30:12,293 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:30:12,294 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 108 treesize of output 36 [2021-11-03 04:30:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-03 04:30:12,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-03 04:30:13,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:13,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441096784] [2021-11-03 04:30:13,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441096784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:13,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:13,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:30:13,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201086771] [2021-11-03 04:30:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:30:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:30:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:30:13,568 INFO L87 Difference]: Start difference. First operand 2975 states and 4954 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 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 04:30:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:47,943 INFO L93 Difference]: Finished difference Result 7680 states and 12473 transitions. [2021-11-03 04:30:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:30:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 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 310 [2021-11-03 04:30:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:47,956 INFO L225 Difference]: With dead ends: 7680 [2021-11-03 04:30:47,956 INFO L226 Difference]: Without dead ends: 4715 [2021-11-03 04:30:47,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:30:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-03 04:30:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 2975. [2021-11-03 04:30:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 1.6455951580363146) internal successors, (4894), 2974 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states 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 04:30:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 4894 transitions. [2021-11-03 04:30:48,174 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 4894 transitions. Word has length 310 [2021-11-03 04:30:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 4894 transitions. [2021-11-03 04:30:48,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 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 04:30:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 4894 transitions. [2021-11-03 04:30:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-03 04:30:48,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:48,184 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:48,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:48,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:48,406 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:30:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2098964123, now seen corresponding path program 1 times [2021-11-03 04:30:48,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:48,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132291668] [2021-11-03 04:30:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:48,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:48,409 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:48,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:30:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:30:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:52,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:52,545 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:30:52,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:30:52,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:52,989 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:30:52,989 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 70 treesize of output 87 [2021-11-03 04:30:53,551 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:30:53,551 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 108 treesize of output 36 [2021-11-03 04:30:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:30:54,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:30:54,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:54,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132291668] [2021-11-03 04:30:54,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132291668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:54,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:54,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:30:54,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873148969] [2021-11-03 04:30:54,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:30:54,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:30:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:30:54,876 INFO L87 Difference]: Start difference. First operand 2975 states and 4894 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 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 04:31:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:49,162 INFO L93 Difference]: Finished difference Result 7824 states and 12568 transitions. [2021-11-03 04:31:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:31:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 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 310 [2021-11-03 04:31:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:49,174 INFO L225 Difference]: With dead ends: 7824 [2021-11-03 04:31:49,174 INFO L226 Difference]: Without dead ends: 4859 [2021-11-03 04:31:49,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:31:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2021-11-03 04:31:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 3047. [2021-11-03 04:31:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3046 states have (on average 1.6244254760341432) internal successors, (4948), 3046 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states 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 04:31:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4948 transitions. [2021-11-03 04:31:49,412 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4948 transitions. Word has length 310 [2021-11-03 04:31:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:49,413 INFO L470 AbstractCegarLoop]: Abstraction has 3047 states and 4948 transitions. [2021-11-03 04:31:49,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 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 04:31:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4948 transitions. [2021-11-03 04:31:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-03 04:31:49,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:49,421 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:49,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:49,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:49,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash -242249437, now seen corresponding path program 1 times [2021-11-03 04:31:49,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:49,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750659947] [2021-11-03 04:31:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:49,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:49,648 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:49,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:31:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:53,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:31:53,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:54,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:54,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:54,451 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:31:54,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:31:54,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:54,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:54,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:54,919 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:31:54,924 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 70 treesize of output 87 [2021-11-03 04:31:55,535 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:31:55,536 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 108 treesize of output 36 [2021-11-03 04:31:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:31:55,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:31:56,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:56,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750659947] [2021-11-03 04:31:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750659947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:56,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:56,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:31:56,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087742759] [2021-11-03 04:31:56,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:31:56,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:31:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:31:56,910 INFO L87 Difference]: Start difference. First operand 3047 states and 4948 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 04:32:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:39,918 INFO L93 Difference]: Finished difference Result 7878 states and 12517 transitions. [2021-11-03 04:32:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:32:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 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 311 [2021-11-03 04:32:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:39,934 INFO L225 Difference]: With dead ends: 7878 [2021-11-03 04:32:39,935 INFO L226 Difference]: Without dead ends: 4841 [2021-11-03 04:32:39,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 614 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:32:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2021-11-03 04:32:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 3053. [2021-11-03 04:32:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 1.6051769331585846) internal successors, (4899), 3052 states have internal predecessors, (4899), 0 states have call successors, (0), 0 states 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 04:32:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4899 transitions. [2021-11-03 04:32:40,160 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4899 transitions. Word has length 311 [2021-11-03 04:32:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:40,160 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 4899 transitions. [2021-11-03 04:32:40,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 04:32:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4899 transitions. [2021-11-03 04:32:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-03 04:32:40,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:40,168 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:40,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:40,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:40,394 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:40,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:40,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1463735958, now seen corresponding path program 1 times [2021-11-03 04:32:40,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:40,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433683199] [2021-11-03 04:32:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:40,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:40,397 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:40,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:32:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:32:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:48,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:48,881 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:32:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:32:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:49,369 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:32:49,370 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 70 treesize of output 87 [2021-11-03 04:32:50,095 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:32:50,095 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 108 treesize of output 36 [2021-11-03 04:32:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:32:50,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:32:51,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:51,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433683199] [2021-11-03 04:32:51,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433683199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:51,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:32:51,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421168986] [2021-11-03 04:32:51,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:32:51,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:51,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:32:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:51,493 INFO L87 Difference]: Start difference. First operand 3053 states and 4899 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 04:33:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:59,793 INFO L93 Difference]: Finished difference Result 7884 states and 12394 transitions. [2021-11-03 04:33:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:33:59,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 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 312 [2021-11-03 04:33:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:59,799 INFO L225 Difference]: With dead ends: 7884 [2021-11-03 04:33:59,800 INFO L226 Difference]: Without dead ends: 4841 [2021-11-03 04:33:59,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:33:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2021-11-03 04:34:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 3059. [2021-11-03 04:34:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 1.5860039241334205) internal successors, (4850), 3058 states have internal predecessors, (4850), 0 states have call successors, (0), 0 states 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 04:34:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4850 transitions. [2021-11-03 04:34:00,023 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4850 transitions. Word has length 312 [2021-11-03 04:34:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:00,023 INFO L470 AbstractCegarLoop]: Abstraction has 3059 states and 4850 transitions. [2021-11-03 04:34:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 04:34:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4850 transitions. [2021-11-03 04:34:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-03 04:34:00,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:00,029 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:00,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:00,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:00,229 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash 674787912, now seen corresponding path program 1 times [2021-11-03 04:34:00,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:00,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771459199] [2021-11-03 04:34:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:00,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:00,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:00,233 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:00,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:34:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:34:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:09,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:09,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:09,349 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:34:09,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:34:09,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:09,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:09,845 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:34:09,845 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 70 treesize of output 87 [2021-11-03 04:34:10,655 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:34:10,655 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 108 treesize of output 36 [2021-11-03 04:34:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:34:11,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-03 04:34:12,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:12,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771459199] [2021-11-03 04:34:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771459199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:12,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:34:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995422439] [2021-11-03 04:34:12,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:34:12,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:34:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:34:12,033 INFO L87 Difference]: Start difference. First operand 3059 states and 4850 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 04:34:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:52,649 INFO L93 Difference]: Finished difference Result 7542 states and 11730 transitions. [2021-11-03 04:34:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:34:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 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 313 [2021-11-03 04:34:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:52,656 INFO L225 Difference]: With dead ends: 7542 [2021-11-03 04:34:52,656 INFO L226 Difference]: Without dead ends: 4493 [2021-11-03 04:34:52,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 618 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:34:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2021-11-03 04:34:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 3059. [2021-11-03 04:34:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 1.5640941792020928) internal successors, (4783), 3058 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states 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 04:34:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4783 transitions. [2021-11-03 04:34:52,831 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4783 transitions. Word has length 313 [2021-11-03 04:34:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:52,831 INFO L470 AbstractCegarLoop]: Abstraction has 3059 states and 4783 transitions. [2021-11-03 04:34:52,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 04:34:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4783 transitions. [2021-11-03 04:34:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-03 04:34:52,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:52,836 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:52,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:53,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:53,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash -453285852, now seen corresponding path program 1 times [2021-11-03 04:34:53,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:53,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435855571] [2021-11-03 04:34:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:53,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:53,043 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:53,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:34:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:34:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:58,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:58,681 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:34:58,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:34:58,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:58,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:59,197 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:34:59,198 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 70 treesize of output 87 [2021-11-03 04:35:01,928 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:35:01,929 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 108 treesize of output 36 [2021-11-03 04:35:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-03 04:35:02,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-03 04:35:03,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:03,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435855571] [2021-11-03 04:35:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435855571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:03,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:03,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:35:03,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516570967] [2021-11-03 04:35:03,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:35:03,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:35:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:03,383 INFO L87 Difference]: Start difference. First operand 3059 states and 4783 transitions. Second operand has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 04:35:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:49,426 INFO L93 Difference]: Finished difference Result 7856 states and 12069 transitions. [2021-11-03 04:35:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:35:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 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 323 [2021-11-03 04:35:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:49,437 INFO L225 Difference]: With dead ends: 7856 [2021-11-03 04:35:49,437 INFO L226 Difference]: Without dead ends: 4807 [2021-11-03 04:35:49,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 638 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:35:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-11-03 04:35:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3352. [2021-11-03 04:35:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.5607281408534766) internal successors, (5230), 3351 states have internal predecessors, (5230), 0 states have call successors, (0), 0 states 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 04:35:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5230 transitions. [2021-11-03 04:35:49,679 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5230 transitions. Word has length 323 [2021-11-03 04:35:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:49,680 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 5230 transitions. [2021-11-03 04:35:49,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 04:35:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5230 transitions. [2021-11-03 04:35:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-03 04:35:49,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:49,690 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1] [2021-11-03 04:35:49,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:49,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:49,914 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1202712503, now seen corresponding path program 1 times [2021-11-03 04:35:49,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:49,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975074869] [2021-11-03 04:35:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:49,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:49,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:49,918 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:49,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4204ece-923b-45d1-a2da-f3a4db3239c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:35:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:35:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:54,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:54,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:54,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:54,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:55,007 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:35:55,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:35:55,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:55,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:55,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:55,629 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:35:55,630 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 70 treesize of output 87 [2021-11-03 04:35:57,605 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:35:57,605 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 108 treesize of output 36 [2021-11-03 04:35:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-03 04:35:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-03 04:35:59,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:59,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975074869] [2021-11-03 04:35:59,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975074869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:59,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:59,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:35:59,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305474621] [2021-11-03 04:35:59,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:35:59,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:35:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:59,019 INFO L87 Difference]: Start difference. First operand 3352 states and 5230 transitions. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)