./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:40:37,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:40:37,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:40:37,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:40:37,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:40:37,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:40:37,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:40:37,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:40:37,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:40:37,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:40:37,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:40:37,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:40:37,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:40:37,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:40:37,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:40:37,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:40:37,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:40:37,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:40:37,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:40:37,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:40:37,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:40:37,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:40:37,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:40:37,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:40:37,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:40:37,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:40:37,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:40:37,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:40:37,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:40:37,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:40:37,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:40:37,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:40:37,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:40:37,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:40:37,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:40:37,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:40:37,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:40:37,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:40:37,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:40:37,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:40:37,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:40:37,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:40:37,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:40:37,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:40:37,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:40:37,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:40:37,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:40:37,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:40:37,340 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:40:37,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:40:37,340 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:40:37,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:40:37,342 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:40:37,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:40:37,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:40:37,342 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:40:37,343 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:40:37,343 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:40:37,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:40:37,343 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:40:37,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:40:37,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:40:37,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:40:37,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:40:37,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:40:37,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:40:37,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:40:37,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:40:37,348 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:40:37,348 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:40:37,349 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:40:37,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:40:37,349 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:40:37,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:40:37,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:40:37,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:40:37,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:40:37,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:40:37,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:40:37,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:40:37,351 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:40:37,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:40:37,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:40:37,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:40:37,352 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_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2021-11-21 00:40:37,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:40:37,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:40:37,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:40:37,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:40:37,741 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:40:37,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-21 00:40:37,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/129284bc8/c9ba4fa87ee84d8c8bd811ac0fc19a72/FLAGed859a19c [2021-11-21 00:40:38,542 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:40:38,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-21 00:40:38,578 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/129284bc8/c9ba4fa87ee84d8c8bd811ac0fc19a72/FLAGed859a19c [2021-11-21 00:40:38,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/129284bc8/c9ba4fa87ee84d8c8bd811ac0fc19a72 [2021-11-21 00:40:38,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:40:38,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:40:38,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:40:38,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:40:38,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:40:38,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:40:38" (1/1) ... [2021-11-21 00:40:38,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10206259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:38, skipping insertion in model container [2021-11-21 00:40:38,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:40:38" (1/1) ... [2021-11-21 00:40:38,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:40:38,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:40:39,334 WARN L230 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_2b018dd0-e863-4df9-816a-49de145c1c15/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-21 00:40:39,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:40:39,600 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) [2021-11-21 00:40:39,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f7e588a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:39, skipping insertion in model container [2021-11-21 00:40:39,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:40:39,603 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 00:40:39,605 INFO L158 Benchmark]: Toolchain (without parser) took 873.80ms. Allocated memory is still 109.1MB. Free memory was 87.4MB in the beginning and 61.5MB in the end (delta: 25.9MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2021-11-21 00:40:39,606 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:40:39,608 INFO L158 Benchmark]: CACSL2BoogieTranslator took 870.71ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 61.5MB in the end (delta: 25.7MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2021-11-21 00:40:39,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 870.71ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 61.5MB in the end (delta: 25.7MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:40:42,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:40:42,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:40:42,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:40:42,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:40:42,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:40:42,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:40:42,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:40:42,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:40:42,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:40:42,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:40:42,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:40:42,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:40:42,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:40:42,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:40:42,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:40:42,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:40:42,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:40:42,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:40:42,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:40:42,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:40:42,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:40:42,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:40:42,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:40:42,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:40:42,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:40:42,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:40:42,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:40:42,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:40:42,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:40:42,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:40:42,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:40:42,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:40:42,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:40:42,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:40:42,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:40:42,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:40:42,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:40:42,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:40:42,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:40:42,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:40:42,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 00:40:42,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:40:42,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:40:42,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:40:42,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:40:42,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:40:42,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:40:42,327 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:40:42,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:40:42,327 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:40:42,328 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:40:42,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:40:42,328 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:40:42,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:40:42,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:40:42,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:40:42,330 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:40:42,330 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:40:42,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:40:42,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:40:42,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:40:42,331 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:40:42,331 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:40:42,331 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:40:42,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:40:42,332 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:40:42,332 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:40:42,332 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:40:42,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:40:42,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:40:42,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:40:42,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:40:42,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:40:42,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:40:42,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:40:42,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:40:42,335 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:40:42,335 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:40:42,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:40:42,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:40:42,336 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_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2021-11-21 00:40:42,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:40:42,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:40:42,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:40:42,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:40:42,803 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:40:42,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-21 00:40:42,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/91c743a64/8fe87dbaff2f46ac8e6401de07265530/FLAG47ca709ee [2021-11-21 00:40:43,783 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:40:43,783 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-21 00:40:43,806 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/91c743a64/8fe87dbaff2f46ac8e6401de07265530/FLAG47ca709ee [2021-11-21 00:40:43,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/data/91c743a64/8fe87dbaff2f46ac8e6401de07265530 [2021-11-21 00:40:43,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:40:43,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:40:43,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:40:43,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:40:43,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:40:43,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:40:43" (1/1) ... [2021-11-21 00:40:43,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f66107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:43, skipping insertion in model container [2021-11-21 00:40:43,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:40:43" (1/1) ... [2021-11-21 00:40:43,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:40:43,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:40:44,560 WARN L230 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_2b018dd0-e863-4df9-816a-49de145c1c15/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-21 00:40:44,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:40:44,901 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 00:40:44,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:40:44,936 WARN L230 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_2b018dd0-e863-4df9-816a-49de145c1c15/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-21 00:40:45,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:40:45,100 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:40:45,135 WARN L230 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_2b018dd0-e863-4df9-816a-49de145c1c15/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-21 00:40:45,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:40:45,306 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:40:45,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45 WrapperNode [2021-11-21 00:40:45,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:40:45,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:40:45,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:40:45,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:40:45,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,548 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2021-11-21 00:40:45,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:40:45,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:40:45,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:40:45,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:40:45,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:40:45,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:40:45,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:40:45,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:40:45,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (1/1) ... [2021-11-21 00:40:45,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:40:45,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:40:45,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:40:45,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:40:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-21 00:40:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-21 00:40:45,878 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-21 00:40:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:40:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:40:45,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:40:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:40:45,879 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:40:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:40:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:40:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:40:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:40:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 00:40:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:40:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:40:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:40:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:40:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:40:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:40:46,311 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:40:46,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:40:46,318 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 00:40:57,097 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:40:57,124 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:40:57,125 INFO L301 CfgBuilder]: Removed 151 assume(true) statements. [2021-11-21 00:40:57,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:40:57 BoogieIcfgContainer [2021-11-21 00:40:57,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:40:57,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:40:57,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:40:57,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:40:57,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:40:43" (1/3) ... [2021-11-21 00:40:57,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768963b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:40:57, skipping insertion in model container [2021-11-21 00:40:57,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:45" (2/3) ... [2021-11-21 00:40:57,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768963b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:40:57, skipping insertion in model container [2021-11-21 00:40:57,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:40:57" (3/3) ... [2021-11-21 00:40:57,141 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-1.i [2021-11-21 00:40:57,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:40:57,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2021-11-21 00:40:57,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:40:57,209 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 00:40:57,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2021-11-21 00:40:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 00:40:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 00:40:57,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:40:57,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 00:40:57,282 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:40:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:40:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-11-21 00:40:57,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:40:57,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465672867] [2021-11-21 00:40:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:40:57,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:40:57,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:40:57,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:40:57,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:40:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:40:57,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:40:57,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:40:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:40:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:40:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:40:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:40:57,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:40:57,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465672867] [2021-11-21 00:40:57,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465672867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:40:57,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:40:57,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:40:57,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319615584] [2021-11-21 00:40:57,781 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:40:57,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:40:57,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:40:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:40:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:40:57,836 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:02,330 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2021-11-21 00:41:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:02,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-21 00:41:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:02,369 INFO L225 Difference]: With dead ends: 2558 [2021-11-21 00:41:02,370 INFO L226 Difference]: Without dead ends: 2556 [2021-11-21 00:41:02,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:02,376 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:02,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-21 00:41:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-11-21 00:41:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2021-11-21 00:41:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2021-11-21 00:41:02,537 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2021-11-21 00:41:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:02,537 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2021-11-21 00:41:02,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2021-11-21 00:41:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 00:41:02,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:02,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 00:41:02,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:02,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:02,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-11-21 00:41:02,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:02,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658614809] [2021-11-21 00:41:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:02,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:02,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:02,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:41:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:02,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:03,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:03,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:03,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658614809] [2021-11-21 00:41:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658614809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:03,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:03,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 00:41:03,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332739392] [2021-11-21 00:41:03,075 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:03,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:03,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:03,078 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:13,243 INFO L93 Difference]: Finished difference Result 3303 states and 3727 transitions. [2021-11-21 00:41:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-11-21 00:41:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:13,264 INFO L225 Difference]: With dead ends: 3303 [2021-11-21 00:41:13,264 INFO L226 Difference]: Without dead ends: 3303 [2021-11-21 00:41:13,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:13,267 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 2250 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:13,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2258 Valid, 3292 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-21 00:41:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-11-21 00:41:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2366. [2021-11-21 00:41:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 1400 states have (on average 2.025714285714286) internal successors, (2836), 2350 states have internal predecessors, (2836), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 2868 transitions. [2021-11-21 00:41:13,350 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 2868 transitions. Word has length 3 [2021-11-21 00:41:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:13,350 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 2868 transitions. [2021-11-21 00:41:13,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 2868 transitions. [2021-11-21 00:41:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:41:13,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:13,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:13,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-21 00:41:13,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:13,563 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:13,564 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-11-21 00:41:13,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17667616] [2021-11-21 00:41:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:13,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:13,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:13,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:41:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:13,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:13,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:13,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:13,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:13,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17667616] [2021-11-21 00:41:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17667616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:13,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:13,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:41:13,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358955464] [2021-11-21 00:41:13,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:13,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:13,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:13,849 INFO L87 Difference]: Start difference. First operand 2366 states and 2868 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:17,608 INFO L93 Difference]: Finished difference Result 3104 states and 3606 transitions. [2021-11-21 00:41:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-21 00:41:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:17,627 INFO L225 Difference]: With dead ends: 3104 [2021-11-21 00:41:17,627 INFO L226 Difference]: Without dead ends: 3104 [2021-11-21 00:41:17,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:17,629 INFO L933 BasicCegarLoop]: 1950 mSDtfsCounter, 1987 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:17,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 2597 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 00:41:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-21 00:41:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2275. [2021-11-21 00:41:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 1400 states have (on average 1.9364285714285714) internal successors, (2711), 2259 states have internal predecessors, (2711), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2743 transitions. [2021-11-21 00:41:17,704 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2743 transitions. Word has length 8 [2021-11-21 00:41:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:17,704 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 2743 transitions. [2021-11-21 00:41:17,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2743 transitions. [2021-11-21 00:41:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:41:17,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:17,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:17,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:17,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:17,929 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:17,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:17,930 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-11-21 00:41:17,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:17,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356396779] [2021-11-21 00:41:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:17,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:17,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:17,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:17,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:41:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:18,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:18,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:18,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356396779] [2021-11-21 00:41:18,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356396779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:18,335 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 00:41:18,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815407648] [2021-11-21 00:41:18,336 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:18,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:18,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:18,338 INFO L87 Difference]: Start difference. First operand 2275 states and 2743 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:28,010 INFO L93 Difference]: Finished difference Result 3232 states and 3635 transitions. [2021-11-21 00:41:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-21 00:41:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:28,029 INFO L225 Difference]: With dead ends: 3232 [2021-11-21 00:41:28,029 INFO L226 Difference]: Without dead ends: 3232 [2021-11-21 00:41:28,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:28,031 INFO L933 BasicCegarLoop]: 2282 mSDtfsCounter, 1443 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:28,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 4240 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-11-21 00:41:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-21 00:41:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2267. [2021-11-21 00:41:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 1402 states have (on average 1.9194008559201141) internal successors, (2691), 2251 states have internal predecessors, (2691), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2723 transitions. [2021-11-21 00:41:28,094 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2723 transitions. Word has length 8 [2021-11-21 00:41:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:28,095 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2723 transitions. [2021-11-21 00:41:28,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2723 transitions. [2021-11-21 00:41:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:41:28,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:28,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:28,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-21 00:41:28,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:28,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-11-21 00:41:28,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:28,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085437877] [2021-11-21 00:41:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:28,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:28,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:28,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:28,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:41:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:28,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:28,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085437877] [2021-11-21 00:41:28,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085437877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:28,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:28,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:41:28,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458391000] [2021-11-21 00:41:28,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:28,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:28,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:28,553 INFO L87 Difference]: Start difference. First operand 2267 states and 2723 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:28,616 INFO L93 Difference]: Finished difference Result 2225 states and 2680 transitions. [2021-11-21 00:41:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-11-21 00:41:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:28,631 INFO L225 Difference]: With dead ends: 2225 [2021-11-21 00:41:28,631 INFO L226 Difference]: Without dead ends: 2225 [2021-11-21 00:41:28,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:28,635 INFO L933 BasicCegarLoop]: 2000 mSDtfsCounter, 1592 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:28,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 3210 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:41:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-11-21 00:41:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2225. [2021-11-21 00:41:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 1384 states have (on average 1.9132947976878614) internal successors, (2648), 2209 states have internal predecessors, (2648), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2680 transitions. [2021-11-21 00:41:28,691 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2680 transitions. Word has length 11 [2021-11-21 00:41:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:28,692 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 2680 transitions. [2021-11-21 00:41:28,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2680 transitions. [2021-11-21 00:41:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:41:28,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:28,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:28,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:28,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:28,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-11-21 00:41:28,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:28,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033083321] [2021-11-21 00:41:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:28,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:28,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:28,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:41:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:29,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:29,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033083321] [2021-11-21 00:41:29,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033083321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:29,170 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:29,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-21 00:41:29,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556270188] [2021-11-21 00:41:29,170 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:29,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:41:29,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:41:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:41:29,172 INFO L87 Difference]: Start difference. First operand 2225 states and 2680 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:29,293 INFO L93 Difference]: Finished difference Result 2204 states and 2652 transitions. [2021-11-21 00:41:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:29,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 13 [2021-11-21 00:41:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:29,304 INFO L225 Difference]: With dead ends: 2204 [2021-11-21 00:41:29,304 INFO L226 Difference]: Without dead ends: 2204 [2021-11-21 00:41:29,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:29,305 INFO L933 BasicCegarLoop]: 1955 mSDtfsCounter, 1524 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:29,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 5113 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:41:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-11-21 00:41:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2203. [2021-11-21 00:41:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 1376 states have (on average 1.903343023255814) internal successors, (2619), 2187 states have internal predecessors, (2619), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 2651 transitions. [2021-11-21 00:41:29,356 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 2651 transitions. Word has length 13 [2021-11-21 00:41:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:29,356 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 2651 transitions. [2021-11-21 00:41:29,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 2651 transitions. [2021-11-21 00:41:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:41:29,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:29,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:29,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-21 00:41:29,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:29,573 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-11-21 00:41:29,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175593284] [2021-11-21 00:41:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:29,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:29,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:29,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:41:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:29,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:29,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175593284] [2021-11-21 00:41:29,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175593284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:29,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:29,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:41:29,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962327494] [2021-11-21 00:41:29,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:29,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:29,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:29,848 INFO L87 Difference]: Start difference. First operand 2203 states and 2651 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:29,951 INFO L93 Difference]: Finished difference Result 3480 states and 4065 transitions. [2021-11-21 00:41:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-21 00:41:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:29,973 INFO L225 Difference]: With dead ends: 3480 [2021-11-21 00:41:29,973 INFO L226 Difference]: Without dead ends: 3480 [2021-11-21 00:41:29,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:29,974 INFO L933 BasicCegarLoop]: 3067 mSDtfsCounter, 3762 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3772 SdHoareTripleChecker+Valid, 4475 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:29,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3772 Valid, 4475 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:41:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-21 00:41:30,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 2161. [2021-11-21 00:41:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 1358 states have (on average 1.8969072164948453) internal successors, (2576), 2145 states have internal predecessors, (2576), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 2608 transitions. [2021-11-21 00:41:30,041 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 2608 transitions. Word has length 20 [2021-11-21 00:41:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:30,042 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 2608 transitions. [2021-11-21 00:41:30,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 2608 transitions. [2021-11-21 00:41:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:41:30,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:30,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:30,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:30,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:30,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-11-21 00:41:30,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088684863] [2021-11-21 00:41:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:30,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:30,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 00:41:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:30,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:30,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:30,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:30,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088684863] [2021-11-21 00:41:30,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088684863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:30,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:30,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:41:30,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116224901] [2021-11-21 00:41:30,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:30,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:30,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:30,527 INFO L87 Difference]: Start difference. First operand 2161 states and 2608 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:30,644 INFO L93 Difference]: Finished difference Result 3353 states and 3884 transitions. [2021-11-21 00:41:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-21 00:41:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:30,665 INFO L225 Difference]: With dead ends: 3353 [2021-11-21 00:41:30,666 INFO L226 Difference]: Without dead ends: 3353 [2021-11-21 00:41:30,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:30,667 INFO L933 BasicCegarLoop]: 2975 mSDtfsCounter, 3676 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3686 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:30,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3686 Valid, 4333 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:41:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-11-21 00:41:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2083. [2021-11-21 00:41:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 1304 states have (on average 1.8765337423312884) internal successors, (2447), 2067 states have internal predecessors, (2447), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2479 transitions. [2021-11-21 00:41:30,726 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2479 transitions. Word has length 20 [2021-11-21 00:41:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 2479 transitions. [2021-11-21 00:41:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2479 transitions. [2021-11-21 00:41:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:41:30,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:30,728 INFO L514 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] [2021-11-21 00:41:30,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:30,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:30,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-11-21 00:41:30,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:30,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860199518] [2021-11-21 00:41:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:30,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:30,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:30,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:30,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 00:41:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:31,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:31,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:31,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860199518] [2021-11-21 00:41:31,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860199518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:31,243 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:31,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-21 00:41:31,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106386128] [2021-11-21 00:41:31,244 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:31,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:41:31,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:41:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:41:31,245 INFO L87 Difference]: Start difference. First operand 2083 states and 2479 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:31,402 INFO L93 Difference]: Finished difference Result 3339 states and 3865 transitions. [2021-11-21 00:41:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-21 00:41:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:31,422 INFO L225 Difference]: With dead ends: 3339 [2021-11-21 00:41:31,422 INFO L226 Difference]: Without dead ends: 3339 [2021-11-21 00:41:31,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:31,424 INFO L933 BasicCegarLoop]: 3159 mSDtfsCounter, 3608 mSDsluCounter, 4517 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3618 SdHoareTripleChecker+Valid, 7676 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:31,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3618 Valid, 7676 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:41:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-11-21 00:41:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2061. [2021-11-21 00:41:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1296 states have (on average 1.8657407407407407) internal successors, (2418), 2045 states have internal predecessors, (2418), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 2450 transitions. [2021-11-21 00:41:31,475 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 2450 transitions. Word has length 22 [2021-11-21 00:41:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:31,476 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 2450 transitions. [2021-11-21 00:41:31,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 2450 transitions. [2021-11-21 00:41:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:41:31,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:31,478 INFO L514 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] [2021-11-21 00:41:31,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:31,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:31,692 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-11-21 00:41:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411834869] [2021-11-21 00:41:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:31,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:31,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 00:41:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:31,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:31,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:32,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411834869] [2021-11-21 00:41:32,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411834869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:32,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:32,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-21 00:41:32,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602276463] [2021-11-21 00:41:32,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:32,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:41:32,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:41:32,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:41:32,046 INFO L87 Difference]: Start difference. First operand 2061 states and 2450 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:32,215 INFO L93 Difference]: Finished difference Result 3274 states and 3742 transitions. [2021-11-21 00:41:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-21 00:41:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:32,229 INFO L225 Difference]: With dead ends: 3274 [2021-11-21 00:41:32,230 INFO L226 Difference]: Without dead ends: 3274 [2021-11-21 00:41:32,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:32,231 INFO L933 BasicCegarLoop]: 3082 mSDtfsCounter, 3538 mSDsluCounter, 4398 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 7480 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:32,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3548 Valid, 7480 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:41:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2021-11-21 00:41:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 2023. [2021-11-21 00:41:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1272 states have (on average 1.8325471698113207) internal successors, (2331), 2007 states have internal predecessors, (2331), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2363 transitions. [2021-11-21 00:41:32,280 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2363 transitions. Word has length 22 [2021-11-21 00:41:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:32,280 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 2363 transitions. [2021-11-21 00:41:32,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2363 transitions. [2021-11-21 00:41:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:41:32,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:32,282 INFO L514 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] [2021-11-21 00:41:32,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:32,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:32,497 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:32,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-11-21 00:41:32,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:32,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743777359] [2021-11-21 00:41:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:32,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:32,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:32,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:32,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 00:41:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:32,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:32,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743777359] [2021-11-21 00:41:32,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743777359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:32,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:32,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:41:32,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191075527] [2021-11-21 00:41:32,867 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:32,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:32,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:32,869 INFO L87 Difference]: Start difference. First operand 2023 states and 2363 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:36,251 INFO L93 Difference]: Finished difference Result 2298 states and 2540 transitions. [2021-11-21 00:41:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-21 00:41:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:36,278 INFO L225 Difference]: With dead ends: 2298 [2021-11-21 00:41:36,278 INFO L226 Difference]: Without dead ends: 2298 [2021-11-21 00:41:36,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:41:36,279 INFO L933 BasicCegarLoop]: 1122 mSDtfsCounter, 2347 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2353 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:36,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2353 Valid, 2015 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 00:41:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-11-21 00:41:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2019. [2021-11-21 00:41:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1272 states have (on average 1.8294025157232705) internal successors, (2327), 2003 states have internal predecessors, (2327), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2359 transitions. [2021-11-21 00:41:36,328 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2359 transitions. Word has length 27 [2021-11-21 00:41:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:36,328 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 2359 transitions. [2021-11-21 00:41:36,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2359 transitions. [2021-11-21 00:41:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:41:36,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:36,333 INFO L514 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] [2021-11-21 00:41:36,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:36,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:36,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-11-21 00:41:36,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:36,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724693416] [2021-11-21 00:41:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:36,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:36,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:36,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:36,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 00:41:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:41:36,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:36,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:37,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:37,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:37,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724693416] [2021-11-21 00:41:37,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724693416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:37,481 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:37,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:41:37,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510941004] [2021-11-21 00:41:37,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:37,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:41:37,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:41:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:37,483 INFO L87 Difference]: Start difference. First operand 2019 states and 2359 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:49,550 INFO L93 Difference]: Finished difference Result 2817 states and 3132 transitions. [2021-11-21 00:41:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:41:49,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 00:41:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:49,555 INFO L225 Difference]: With dead ends: 2817 [2021-11-21 00:41:49,555 INFO L226 Difference]: Without dead ends: 2817 [2021-11-21 00:41:49,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:41:49,556 INFO L933 BasicCegarLoop]: 1367 mSDtfsCounter, 4074 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:49,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 3717 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2673 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2021-11-21 00:41:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-11-21 00:41:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2052. [2021-11-21 00:41:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1306 states have (on average 1.8101071975497702) internal successors, (2364), 2036 states have internal predecessors, (2364), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2396 transitions. [2021-11-21 00:41:49,601 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2396 transitions. Word has length 27 [2021-11-21 00:41:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:49,601 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 2396 transitions. [2021-11-21 00:41:49,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2396 transitions. [2021-11-21 00:41:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:41:49,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:49,603 INFO L514 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] [2021-11-21 00:41:49,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:49,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:49,816 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-11-21 00:41:49,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:49,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67501775] [2021-11-21 00:41:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:49,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:49,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:49,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 00:41:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:50,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:50,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:50,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67501775] [2021-11-21 00:41:50,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67501775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:50,289 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:50,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:41:50,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636252880] [2021-11-21 00:41:50,289 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:50,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:50,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:50,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:50,293 INFO L87 Difference]: Start difference. First operand 2052 states and 2396 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:56,014 INFO L93 Difference]: Finished difference Result 3953 states and 4482 transitions. [2021-11-21 00:41:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:56,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-21 00:41:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:56,032 INFO L225 Difference]: With dead ends: 3953 [2021-11-21 00:41:56,033 INFO L226 Difference]: Without dead ends: 3953 [2021-11-21 00:41:56,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:41:56,033 INFO L933 BasicCegarLoop]: 2430 mSDtfsCounter, 3322 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3329 SdHoareTripleChecker+Valid, 4236 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:56,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3329 Valid, 4236 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2636 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 00:41:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-11-21 00:41:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 2048. [2021-11-21 00:41:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1306 states have (on average 1.8070444104134762) internal successors, (2360), 2032 states have internal predecessors, (2360), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 2392 transitions. [2021-11-21 00:41:56,076 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 2392 transitions. Word has length 36 [2021-11-21 00:41:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:56,077 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 2392 transitions. [2021-11-21 00:41:56,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:41:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 2392 transitions. [2021-11-21 00:41:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:41:56,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:56,079 INFO L514 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] [2021-11-21 00:41:56,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:56,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:56,297 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:41:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-11-21 00:41:56,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702894213] [2021-11-21 00:41:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:56,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:56,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:56,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 00:41:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:41:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:56,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:41:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:56,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:57,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702894213] [2021-11-21 00:41:57,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702894213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:57,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:57,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:41:57,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796884010] [2021-11-21 00:41:57,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:57,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:41:57,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:41:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:57,303 INFO L87 Difference]: Start difference. First operand 2048 states and 2392 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:13,543 INFO L93 Difference]: Finished difference Result 3842 states and 4245 transitions. [2021-11-21 00:42:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:42:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 00:42:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:13,554 INFO L225 Difference]: With dead ends: 3842 [2021-11-21 00:42:13,554 INFO L226 Difference]: Without dead ends: 3842 [2021-11-21 00:42:13,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:42:13,555 INFO L933 BasicCegarLoop]: 2279 mSDtfsCounter, 4734 mSDsluCounter, 3701 mSDsCounter, 0 mSdLazyCounter, 3778 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 5980 SdHoareTripleChecker+Invalid, 3810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:13,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 5980 Invalid, 3810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3778 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2021-11-21 00:42:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2021-11-21 00:42:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 2044. [2021-11-21 00:42:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1306 states have (on average 1.8039816232771821) internal successors, (2356), 2028 states have internal predecessors, (2356), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:42:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2388 transitions. [2021-11-21 00:42:13,601 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2388 transitions. Word has length 36 [2021-11-21 00:42:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:13,602 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 2388 transitions. [2021-11-21 00:42:13,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2388 transitions. [2021-11-21 00:42:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:42:13,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:13,603 INFO L514 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] [2021-11-21 00:42:13,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:13,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:13,818 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-11-21 00:42:13,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:13,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680247580] [2021-11-21 00:42:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:13,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:13,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:13,821 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:13,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 00:42:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:14,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:42:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:14,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:14,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:14,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680247580] [2021-11-21 00:42:14,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680247580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:14,211 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:14,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:42:14,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895670187] [2021-11-21 00:42:14,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:14,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:14,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:14,214 INFO L87 Difference]: Start difference. First operand 2044 states and 2388 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:19,929 INFO L93 Difference]: Finished difference Result 4309 states and 4854 transitions. [2021-11-21 00:42:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:42:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-21 00:42:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:19,938 INFO L225 Difference]: With dead ends: 4309 [2021-11-21 00:42:19,938 INFO L226 Difference]: Without dead ends: 4309 [2021-11-21 00:42:19,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:42:19,939 INFO L933 BasicCegarLoop]: 1943 mSDtfsCounter, 4462 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 3938 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:19,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 3938 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 00:42:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-11-21 00:42:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 2041. [2021-11-21 00:42:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1306 states have (on average 1.7955589586523737) internal successors, (2345), 2025 states have internal predecessors, (2345), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:42:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2377 transitions. [2021-11-21 00:42:19,981 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2377 transitions. Word has length 36 [2021-11-21 00:42:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:19,982 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2377 transitions. [2021-11-21 00:42:19,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2377 transitions. [2021-11-21 00:42:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:42:19,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:19,983 INFO L514 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] [2021-11-21 00:42:19,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:20,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:20,196 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-11-21 00:42:20,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:20,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643210187] [2021-11-21 00:42:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:20,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:20,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:20,199 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:20,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 00:42:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:20,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:42:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:20,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:42:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:21,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643210187] [2021-11-21 00:42:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643210187] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:21,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:21,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:42:21,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701314321] [2021-11-21 00:42:21,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:21,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:42:21,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:42:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:42:21,165 INFO L87 Difference]: Start difference. First operand 2041 states and 2377 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:41,313 INFO L93 Difference]: Finished difference Result 4039 states and 4512 transitions. [2021-11-21 00:42:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:42:41,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 00:42:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:41,324 INFO L225 Difference]: With dead ends: 4039 [2021-11-21 00:42:41,324 INFO L226 Difference]: Without dead ends: 4039 [2021-11-21 00:42:41,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:42:41,326 INFO L933 BasicCegarLoop]: 2187 mSDtfsCounter, 3276 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 5112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3281 SdHoareTripleChecker+Valid, 7545 SdHoareTripleChecker+Invalid, 5137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:41,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3281 Valid, 7545 Invalid, 5137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5112 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2021-11-21 00:42:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-11-21 00:42:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2041. [2021-11-21 00:42:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1306 states have (on average 1.7924961715160797) internal successors, (2341), 2025 states have internal predecessors, (2341), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:42:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2373 transitions. [2021-11-21 00:42:41,370 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2373 transitions. Word has length 36 [2021-11-21 00:42:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:41,370 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2373 transitions. [2021-11-21 00:42:41,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2373 transitions. [2021-11-21 00:42:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:42:41,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:41,372 INFO L514 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] [2021-11-21 00:42:41,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:41,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:41,586 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-11-21 00:42:41,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087434882] [2021-11-21 00:42:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:41,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:41,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:41,589 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:41,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 00:42:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:41,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:42,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087434882] [2021-11-21 00:42:42,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087434882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:42,041 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:42,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 00:42:42,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347367295] [2021-11-21 00:42:42,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:42,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:42,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:42,043 INFO L87 Difference]: Start difference. First operand 2041 states and 2373 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:42,117 INFO L93 Difference]: Finished difference Result 2035 states and 2359 transitions. [2021-11-21 00:42:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:42:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-21 00:42:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:42,121 INFO L225 Difference]: With dead ends: 2035 [2021-11-21 00:42:42,121 INFO L226 Difference]: Without dead ends: 2035 [2021-11-21 00:42:42,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:42:42,122 INFO L933 BasicCegarLoop]: 1785 mSDtfsCounter, 749 mSDsluCounter, 2808 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 4593 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:42,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 4593 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-21 00:42:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2035. [2021-11-21 00:42:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1300 states have (on average 1.79) internal successors, (2327), 2019 states have internal predecessors, (2327), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:42:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2359 transitions. [2021-11-21 00:42:42,151 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2359 transitions. Word has length 40 [2021-11-21 00:42:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:42,151 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 2359 transitions. [2021-11-21 00:42:42,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2359 transitions. [2021-11-21 00:42:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:42:42,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:42,152 INFO L514 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] [2021-11-21 00:42:42,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:42,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:42,366 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-11-21 00:42:42,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:42,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460668169] [2021-11-21 00:42:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:42,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:42,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 00:42:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:42,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:43,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460668169] [2021-11-21 00:42:43,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460668169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:43,247 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:43,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:42:43,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70130472] [2021-11-21 00:42:43,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:43,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:43,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:43,249 INFO L87 Difference]: Start difference. First operand 2035 states and 2359 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:43,465 INFO L93 Difference]: Finished difference Result 3181 states and 3621 transitions. [2021-11-21 00:42:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2021-11-21 00:42:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:43,472 INFO L225 Difference]: With dead ends: 3181 [2021-11-21 00:42:43,473 INFO L226 Difference]: Without dead ends: 3181 [2021-11-21 00:42:43,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:43,476 INFO L933 BasicCegarLoop]: 1805 mSDtfsCounter, 1176 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:43,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 3475 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:42:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-21 00:42:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2636. [2021-11-21 00:42:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 1899 states have (on average 1.7693522906793049) internal successors, (3360), 2615 states have internal predecessors, (3360), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:42:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3402 transitions. [2021-11-21 00:42:43,537 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3402 transitions. Word has length 48 [2021-11-21 00:42:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:43,537 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3402 transitions. [2021-11-21 00:42:43,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3402 transitions. [2021-11-21 00:42:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:42:43,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:43,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:43,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:43,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:43,752 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-11-21 00:42:43,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069641528] [2021-11-21 00:42:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:43,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:43,755 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:43,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 00:42:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:44,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:44,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069641528] [2021-11-21 00:42:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069641528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:44,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:44,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 00:42:44,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934235344] [2021-11-21 00:42:44,158 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:44,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:44,159 INFO L87 Difference]: Start difference. First operand 2636 states and 3402 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:44,218 INFO L93 Difference]: Finished difference Result 3591 states and 4413 transitions. [2021-11-21 00:42:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:42:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-21 00:42:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:44,227 INFO L225 Difference]: With dead ends: 3591 [2021-11-21 00:42:44,228 INFO L226 Difference]: Without dead ends: 3591 [2021-11-21 00:42:44,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:42:44,229 INFO L933 BasicCegarLoop]: 2633 mSDtfsCounter, 1743 mSDsluCounter, 3725 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 6358 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:44,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 6358 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-11-21 00:42:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 2612. [2021-11-21 00:42:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 1875 states have (on average 1.7706666666666666) internal successors, (3320), 2591 states have internal predecessors, (3320), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:42:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 3362 transitions. [2021-11-21 00:42:44,274 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 3362 transitions. Word has length 51 [2021-11-21 00:42:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:44,275 INFO L470 AbstractCegarLoop]: Abstraction has 2612 states and 3362 transitions. [2021-11-21 00:42:44,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 3362 transitions. [2021-11-21 00:42:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:42:44,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:44,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:44,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:44,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:44,490 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-11-21 00:42:44,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:44,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050643519] [2021-11-21 00:42:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:44,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:44,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:44,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:44,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 00:42:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:44,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050643519] [2021-11-21 00:42:44,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050643519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:44,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:44,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 00:42:44,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303702659] [2021-11-21 00:42:44,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:44,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:44,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:44,964 INFO L87 Difference]: Start difference. First operand 2612 states and 3362 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:45,066 INFO L93 Difference]: Finished difference Result 3336 states and 3911 transitions. [2021-11-21 00:42:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:42:45,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 00:42:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:45,071 INFO L225 Difference]: With dead ends: 3336 [2021-11-21 00:42:45,071 INFO L226 Difference]: Without dead ends: 3336 [2021-11-21 00:42:45,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:42:45,073 INFO L933 BasicCegarLoop]: 2896 mSDtfsCounter, 1734 mSDsluCounter, 4038 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 6934 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:45,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1744 Valid, 6934 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-11-21 00:42:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2600. [2021-11-21 00:42:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 1863 states have (on average 1.7713365539452497) internal successors, (3300), 2579 states have internal predecessors, (3300), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:42:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3342 transitions. [2021-11-21 00:42:45,124 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3342 transitions. Word has length 54 [2021-11-21 00:42:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:45,124 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 3342 transitions. [2021-11-21 00:42:45,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3342 transitions. [2021-11-21 00:42:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 00:42:45,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:45,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:45,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:45,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:45,339 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2021-11-21 00:42:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:45,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264362450] [2021-11-21 00:42:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:45,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:45,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:45,341 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:45,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 00:42:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:45,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:45,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:45,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:45,638 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-21 00:42:45,639 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-21 00:42:45,711 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:42:45,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-21 00:42:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:45,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:45,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264362450] [2021-11-21 00:42:45,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264362450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:45,975 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:45,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:42:45,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386606131] [2021-11-21 00:42:45,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:45,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:42:45,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:42:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:42:45,977 INFO L87 Difference]: Start difference. First operand 2600 states and 3342 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:48,885 INFO L93 Difference]: Finished difference Result 2567 states and 3308 transitions. [2021-11-21 00:42:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:42:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-21 00:42:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:48,889 INFO L225 Difference]: With dead ends: 2567 [2021-11-21 00:42:48,889 INFO L226 Difference]: Without dead ends: 2567 [2021-11-21 00:42:48,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:42:48,891 INFO L933 BasicCegarLoop]: 1686 mSDtfsCounter, 755 mSDsluCounter, 5763 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 7449 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:48,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 7449 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 00:42:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-11-21 00:42:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2566. [2021-11-21 00:42:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 1829 states have (on average 1.7851284855112084) internal successors, (3265), 2545 states have internal predecessors, (3265), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:42:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3307 transitions. [2021-11-21 00:42:48,932 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3307 transitions. Word has length 57 [2021-11-21 00:42:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:48,933 INFO L470 AbstractCegarLoop]: Abstraction has 2566 states and 3307 transitions. [2021-11-21 00:42:48,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3307 transitions. [2021-11-21 00:42:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-21 00:42:48,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:48,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:48,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:49,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:49,149 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-11-21 00:42:49,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:49,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343814646] [2021-11-21 00:42:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:49,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:49,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:49,151 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:49,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 00:42:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:49,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:50,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343814646] [2021-11-21 00:42:50,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343814646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:50,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:50,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:42:50,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231058676] [2021-11-21 00:42:50,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:50,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,134 INFO L87 Difference]: Start difference. First operand 2566 states and 3307 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,354 INFO L93 Difference]: Finished difference Result 3547 states and 4402 transitions. [2021-11-21 00:42:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-21 00:42:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,360 INFO L225 Difference]: With dead ends: 3547 [2021-11-21 00:42:50,360 INFO L226 Difference]: Without dead ends: 3547 [2021-11-21 00:42:50,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,361 INFO L933 BasicCegarLoop]: 2011 mSDtfsCounter, 866 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 3672 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:42:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-11-21 00:42:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3211. [2021-11-21 00:42:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2471 states have (on average 1.7567786321327399) internal successors, (4341), 3184 states have internal predecessors, (4341), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:42:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4395 transitions. [2021-11-21 00:42:50,415 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4395 transitions. Word has length 59 [2021-11-21 00:42:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,415 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 4395 transitions. [2021-11-21 00:42:50,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4395 transitions. [2021-11-21 00:42:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 00:42:50,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:50,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:50,635 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-11-21 00:42:50,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:50,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362518711] [2021-11-21 00:42:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:50,638 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:50,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 00:42:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:42:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:42:51,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:42:51,819 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:42:51,820 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 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-21 00:42:51,837 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:42:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:42:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:51,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:57,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362518711] [2021-11-21 00:42:57,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362518711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:57,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:57,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:42:57,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543571697] [2021-11-21 00:42:57,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:57,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:42:57,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:42:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-21 00:42:57,040 INFO L87 Difference]: Start difference. First operand 3211 states and 4395 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:58,903 INFO L93 Difference]: Finished difference Result 3475 states and 4584 transitions. [2021-11-21 00:42:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:42:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-21 00:42:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:58,910 INFO L225 Difference]: With dead ends: 3475 [2021-11-21 00:42:58,910 INFO L226 Difference]: Without dead ends: 3475 [2021-11-21 00:42:58,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-21 00:42:58,912 INFO L933 BasicCegarLoop]: 1807 mSDtfsCounter, 867 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2186 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:58,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 4033 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 2186 Unchecked, 1.8s Time] [2021-11-21 00:42:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2021-11-21 00:42:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3210. [2021-11-21 00:42:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 2471 states have (on average 1.7559692432213678) internal successors, (4339), 3183 states have internal predecessors, (4339), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:42:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 4393 transitions. [2021-11-21 00:42:58,977 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 4393 transitions. Word has length 62 [2021-11-21 00:42:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:58,978 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 4393 transitions. [2021-11-21 00:42:58,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 4393 transitions. [2021-11-21 00:42:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 00:42:58,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:58,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:59,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:59,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:59,197 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:42:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash -272070766, now seen corresponding path program 1 times [2021-11-21 00:42:59,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:59,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612813267] [2021-11-21 00:42:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:59,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:59,200 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:59,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 00:42:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:42:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:42:59,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:43:00,477 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:43:00,478 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 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-21 00:43:00,484 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:43:00,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:43:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:00,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:05,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:05,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612813267] [2021-11-21 00:43:05,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612813267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:05,452 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:05,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:43:05,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511016229] [2021-11-21 00:43:05,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:05,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:43:05,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:43:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-21 00:43:05,453 INFO L87 Difference]: Start difference. First operand 3210 states and 4393 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:13,938 INFO L93 Difference]: Finished difference Result 4698 states and 6320 transitions. [2021-11-21 00:43:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-21 00:43:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:13,947 INFO L225 Difference]: With dead ends: 4698 [2021-11-21 00:43:13,948 INFO L226 Difference]: Without dead ends: 4698 [2021-11-21 00:43:13,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-21 00:43:13,949 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 2734 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1301 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:13,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 2798 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2273 Invalid, 0 Unknown, 1301 Unchecked, 8.4s Time] [2021-11-21 00:43:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-11-21 00:43:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 3203. [2021-11-21 00:43:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 2524 states have (on average 1.705229793977813) internal successors, (4304), 3176 states have internal predecessors, (4304), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:43:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4358 transitions. [2021-11-21 00:43:14,005 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4358 transitions. Word has length 62 [2021-11-21 00:43:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 4358 transitions. [2021-11-21 00:43:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4358 transitions. [2021-11-21 00:43:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:43:14,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:14,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:14,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:14,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:14,219 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr393REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:43:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 533035699, now seen corresponding path program 1 times [2021-11-21 00:43:14,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985155057] [2021-11-21 00:43:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:14,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:14,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:14,221 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:14,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 00:43:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:43:14,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:14,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:14,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-11-21 00:43:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:15,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985155057] [2021-11-21 00:43:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985155057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:15,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:15,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:43:15,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383109440] [2021-11-21 00:43:15,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:43:15,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:43:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:43:15,140 INFO L87 Difference]: Start difference. First operand 3203 states and 4358 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:18,669 INFO L93 Difference]: Finished difference Result 3204 states and 4351 transitions. [2021-11-21 00:43:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:18,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-21 00:43:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:18,674 INFO L225 Difference]: With dead ends: 3204 [2021-11-21 00:43:18,674 INFO L226 Difference]: Without dead ends: 3204 [2021-11-21 00:43:18,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:43:18,675 INFO L933 BasicCegarLoop]: 1060 mSDtfsCounter, 4715 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4725 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:18,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4725 Valid, 1274 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 00:43:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-11-21 00:43:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3200. [2021-11-21 00:43:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2524 states have (on average 1.7024564183835182) internal successors, (4297), 3173 states have internal predecessors, (4297), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:43:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 4351 transitions. [2021-11-21 00:43:18,755 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 4351 transitions. Word has length 64 [2021-11-21 00:43:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:18,756 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 4351 transitions. [2021-11-21 00:43:18,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 4351 transitions. [2021-11-21 00:43:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:43:18,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:18,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:18,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-21 00:43:18,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:18,973 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:43:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2021-11-21 00:43:18,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:18,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364235289] [2021-11-21 00:43:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:18,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:18,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:18,975 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:18,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-21 00:43:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:43:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:43:19,362 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 22 treesize of output 18 [2021-11-21 00:43:19,409 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 25 treesize of output 13 [2021-11-21 00:43:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:19,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:19,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:19,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364235289] [2021-11-21 00:43:19,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364235289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:19,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:19,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 00:43:19,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502362254] [2021-11-21 00:43:19,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:19,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:19,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:19,566 INFO L87 Difference]: Start difference. First operand 3200 states and 4351 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:24,600 INFO L93 Difference]: Finished difference Result 3199 states and 4349 transitions. [2021-11-21 00:43:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:43:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 00:43:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:24,607 INFO L225 Difference]: With dead ends: 3199 [2021-11-21 00:43:24,607 INFO L226 Difference]: Without dead ends: 3199 [2021-11-21 00:43:24,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:43:24,608 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 4 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4601 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:24,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4601 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 00:43:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2021-11-21 00:43:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3199. [2021-11-21 00:43:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 2524 states have (on average 1.701664025356577) internal successors, (4295), 3172 states have internal predecessors, (4295), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:43:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4349 transitions. [2021-11-21 00:43:24,647 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4349 transitions. Word has length 67 [2021-11-21 00:43:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:24,647 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 4349 transitions. [2021-11-21 00:43:24,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4349 transitions. [2021-11-21 00:43:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:43:24,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:24,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:24,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-21 00:43:24,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:24,864 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:43:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2021-11-21 00:43:24,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:24,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879433699] [2021-11-21 00:43:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:24,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:24,867 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:24,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-21 00:43:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:43:25,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:25,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:43:25,322 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 [2021-11-21 00:43:25,333 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 19 treesize of output 15 [2021-11-21 00:43:25,405 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 39 treesize of output 27 [2021-11-21 00:43:25,410 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 24 treesize of output 12 [2021-11-21 00:43:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:25,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:25,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:25,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879433699] [2021-11-21 00:43:25,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879433699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:25,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:25,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-21 00:43:25,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335761329] [2021-11-21 00:43:25,823 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:25,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:43:25,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:43:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:43:25,824 INFO L87 Difference]: Start difference. First operand 3199 states and 4349 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:41,896 INFO L93 Difference]: Finished difference Result 3198 states and 4347 transitions. [2021-11-21 00:43:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:43:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 00:43:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:41,904 INFO L225 Difference]: With dead ends: 3198 [2021-11-21 00:43:41,905 INFO L226 Difference]: Without dead ends: 3198 [2021-11-21 00:43:41,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:43:41,906 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 3 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5512 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:41,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5512 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2021-11-21 00:43:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-11-21 00:43:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3198. [2021-11-21 00:43:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2522 states have (on average 1.7022204599524187) internal successors, (4293), 3171 states have internal predecessors, (4293), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:43:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4347 transitions. [2021-11-21 00:43:41,955 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4347 transitions. Word has length 67 [2021-11-21 00:43:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:41,956 INFO L470 AbstractCegarLoop]: Abstraction has 3198 states and 4347 transitions. [2021-11-21 00:43:41,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4347 transitions. [2021-11-21 00:43:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:43:41,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:41,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:41,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:42,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:42,171 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:43:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:42,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2021-11-21 00:43:42,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:42,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467225036] [2021-11-21 00:43:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:42,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:42,175 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:42,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 00:43:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:43:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:42,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:43:42,531 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 22 treesize of output 18 [2021-11-21 00:43:42,563 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 25 treesize of output 13 [2021-11-21 00:43:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:42,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:42,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:42,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467225036] [2021-11-21 00:43:42,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467225036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:42,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:42,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 00:43:42,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369862844] [2021-11-21 00:43:42,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:42,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:42,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:42,712 INFO L87 Difference]: Start difference. First operand 3198 states and 4347 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:47,719 INFO L93 Difference]: Finished difference Result 3197 states and 4344 transitions. [2021-11-21 00:43:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:43:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 00:43:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:47,725 INFO L225 Difference]: With dead ends: 3197 [2021-11-21 00:43:47,726 INFO L226 Difference]: Without dead ends: 3197 [2021-11-21 00:43:47,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:43:47,727 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 4 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4596 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:47,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4596 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 00:43:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-11-21 00:43:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2021-11-21 00:43:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 2522 states have (on average 1.7010309278350515) internal successors, (4290), 3170 states have internal predecessors, (4290), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:43:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4344 transitions. [2021-11-21 00:43:47,772 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4344 transitions. Word has length 67 [2021-11-21 00:43:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:47,772 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 4344 transitions. [2021-11-21 00:43:47,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4344 transitions. [2021-11-21 00:43:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:43:47,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:47,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:47,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:47,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:47,989 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:43:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2021-11-21 00:43:47,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:47,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130939328] [2021-11-21 00:43:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:47,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:47,992 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:48,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-21 00:43:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:43:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:48,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:43:48,347 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 19 treesize of output 15 [2021-11-21 00:43:48,355 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 [2021-11-21 00:43:48,422 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 39 treesize of output 27 [2021-11-21 00:43:48,426 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 24 treesize of output 12 [2021-11-21 00:43:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:48,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:48,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130939328] [2021-11-21 00:43:48,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130939328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:48,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:48,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-21 00:43:48,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043984283] [2021-11-21 00:43:48,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:48,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:43:48,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:43:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:43:48,777 INFO L87 Difference]: Start difference. First operand 3197 states and 4344 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:03,669 INFO L93 Difference]: Finished difference Result 3196 states and 4341 transitions. [2021-11-21 00:44:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:44:03,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 00:44:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:03,673 INFO L225 Difference]: With dead ends: 3196 [2021-11-21 00:44:03,673 INFO L226 Difference]: Without dead ends: 3196 [2021-11-21 00:44:03,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:44:03,674 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 4 mSDsluCounter, 3794 mSDsCounter, 0 mSdLazyCounter, 3098 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5516 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:03,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5516 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3098 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2021-11-21 00:44:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-11-21 00:44:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3196. [2021-11-21 00:44:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 2519 states have (on average 1.7018658197697498) internal successors, (4287), 3169 states have internal predecessors, (4287), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:44:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4341 transitions. [2021-11-21 00:44:03,703 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4341 transitions. Word has length 67 [2021-11-21 00:44:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:03,703 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 4341 transitions. [2021-11-21 00:44:03,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4341 transitions. [2021-11-21 00:44:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 00:44:03,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:03,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:03,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:03,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:03,919 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:44:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2062362287, now seen corresponding path program 1 times [2021-11-21 00:44:03,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:03,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229930122] [2021-11-21 00:44:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:03,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:03,922 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:03,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-21 00:44:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:04,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:44:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:04,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:04,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229930122] [2021-11-21 00:44:04,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229930122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:04,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:04,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:44:04,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346362369] [2021-11-21 00:44:04,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:04,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:44:04,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:04,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:44:04,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:44:04,562 INFO L87 Difference]: Start difference. First operand 3196 states and 4341 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:44:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:04,732 INFO L93 Difference]: Finished difference Result 3206 states and 4357 transitions. [2021-11-21 00:44:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:44:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2021-11-21 00:44:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:04,751 INFO L225 Difference]: With dead ends: 3206 [2021-11-21 00:44:04,751 INFO L226 Difference]: Without dead ends: 3206 [2021-11-21 00:44:04,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:44:04,753 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 11 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:04,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3439 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:44:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-11-21 00:44:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3206. [2021-11-21 00:44:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 2527 states have (on average 1.7012267510882468) internal successors, (4299), 3178 states have internal predecessors, (4299), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (31), 24 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-21 00:44:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 4357 transitions. [2021-11-21 00:44:04,829 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 4357 transitions. Word has length 75 [2021-11-21 00:44:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:04,829 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 4357 transitions. [2021-11-21 00:44:04,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:44:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 4357 transitions. [2021-11-21 00:44:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 00:44:04,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:04,831 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:04,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:05,047 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:44:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -110653553, now seen corresponding path program 1 times [2021-11-21 00:44:05,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137653039] [2021-11-21 00:44:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:05,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:05,050 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:05,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 00:44:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:44:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:05,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:05,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137653039] [2021-11-21 00:44:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137653039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1288979571] [2021-11-21 00:44:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:05,868 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:44:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:44:05,878 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:44:05,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 00:44:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:44:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:06,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:06,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1288979571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:06,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924667264] [2021-11-21 00:44:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:06,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:06,551 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:06,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 00:44:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:44:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:07,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924667264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:07,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:44:07,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-21 00:44:07,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363145119] [2021-11-21 00:44:07,300 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:07,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:44:07,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:44:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:44:07,301 INFO L87 Difference]: Start difference. First operand 3206 states and 4357 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:44:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:07,949 INFO L93 Difference]: Finished difference Result 3220 states and 4377 transitions. [2021-11-21 00:44:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:44:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-21 00:44:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:07,955 INFO L225 Difference]: With dead ends: 3220 [2021-11-21 00:44:07,956 INFO L226 Difference]: Without dead ends: 3214 [2021-11-21 00:44:07,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:44:07,956 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 38 mSDsluCounter, 8570 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10290 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:07,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 10290 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:44:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-11-21 00:44:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3212. [2021-11-21 00:44:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2533 states have (on average 1.6999605211212) internal successors, (4306), 3184 states have internal predecessors, (4306), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (31), 24 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-21 00:44:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 4364 transitions. [2021-11-21 00:44:08,004 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 4364 transitions. Word has length 77 [2021-11-21 00:44:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:08,005 INFO L470 AbstractCegarLoop]: Abstraction has 3212 states and 4364 transitions. [2021-11-21 00:44:08,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:44:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 4364 transitions. [2021-11-21 00:44:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:44:08,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:08,007 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:08,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:08,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:08,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:08,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:08,611 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:44:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 977680719, now seen corresponding path program 2 times [2021-11-21 00:44:08,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:08,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159981756] [2021-11-21 00:44:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:44:08,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:08,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:08,613 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:08,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 00:44:09,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:44:09,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:44:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:09,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:09,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:09,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159981756] [2021-11-21 00:44:09,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159981756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:09,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1842612232] [2021-11-21 00:44:09,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:44:09,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:44:09,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:44:09,898 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:44:09,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-21 00:44:10,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:44:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:44:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:10,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:11,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1842612232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675429288] [2021-11-21 00:44:11,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:44:11,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:11,164 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:11,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 00:44:48,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:44:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:44:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:48,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:49,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675429288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:49,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:44:49,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-21 00:44:49,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303911962] [2021-11-21 00:44:49,238 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:49,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:44:49,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:44:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:44:49,240 INFO L87 Difference]: Start difference. First operand 3212 states and 4364 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:44:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:51,275 INFO L93 Difference]: Finished difference Result 3238 states and 4411 transitions. [2021-11-21 00:44:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 00:44:51,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 81 [2021-11-21 00:44:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:51,281 INFO L225 Difference]: With dead ends: 3238 [2021-11-21 00:44:51,281 INFO L226 Difference]: Without dead ends: 3232 [2021-11-21 00:44:51,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=706, Invalid=1364, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:44:51,283 INFO L933 BasicCegarLoop]: 1723 mSDtfsCounter, 85 mSDsluCounter, 15457 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 17180 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:51,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 17180 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:44:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-21 00:44:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3224. [2021-11-21 00:44:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 2545 states have (on average 1.6978388998035363) internal successors, (4321), 3196 states have internal predecessors, (4321), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (31), 24 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-21 00:44:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 4379 transitions. [2021-11-21 00:44:51,330 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 4379 transitions. Word has length 81 [2021-11-21 00:44:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:51,330 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 4379 transitions. [2021-11-21 00:44:51,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:44:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 4379 transitions. [2021-11-21 00:44:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 00:44:51,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:51,332 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:51,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:51,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:51,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:51,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:51,946 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-21 00:44:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash 397601999, now seen corresponding path program 3 times [2021-11-21 00:44:51,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:51,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604035849] [2021-11-21 00:44:51,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:51,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:51,948 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:51,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 00:44:52,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:44:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:44:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:53,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:55,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:55,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604035849] [2021-11-21 00:44:55,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604035849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29566255] [2021-11-21 00:44:55,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:55,014 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:44:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:44:55,015 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:44:55,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 00:44:56,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:44:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:44:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:57,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:57,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29566255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:57,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6576710] [2021-11-21 00:44:57,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:57,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:57,821 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:57,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b018dd0-e863-4df9-816a-49de145c1c15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process