./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7 --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 d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:53:05,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:53:05,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:53:05,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:53:05,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:53:05,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:53:05,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:53:05,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:53:05,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:53:05,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:53:05,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:53:05,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:53:05,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:53:05,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:53:05,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:53:05,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:53:05,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:53:05,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:53:05,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:53:05,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:53:05,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:53:05,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:53:05,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:53:05,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:53:05,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:53:05,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:53:05,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:53:05,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:53:05,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:53:05,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:53:05,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:53:05,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:53:05,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:53:05,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:53:05,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:53:05,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:53:05,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:53:05,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:53:05,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:53:05,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:53:05,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:53:05,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:53:05,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:53:05,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:53:05,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:53:05,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:53:05,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:53:05,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:53:05,249 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:53:05,249 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:53:05,255 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:53:05,255 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:53:05,256 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:53:05,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:53:05,257 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:53:05,257 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:53:05,257 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:53:05,258 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:53:05,258 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:53:05,258 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:53:05,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:53:05,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:53:05,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:53:05,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:53:05,259 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:53:05,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:53:05,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:53:05,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:53:05,262 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:53:05,262 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:53:05,262 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:53:05,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:53:05,263 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:53:05,263 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:53:05,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:53:05,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:53:05,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:53:05,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:53:05,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:53:05,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:53:05,265 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:53:05,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:53:05,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:53:05,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:53:05,265 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d [2021-11-25 19:53:05,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:53:05,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:53:05,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:53:05,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:53:05,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:53:05,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-25 19:53:05,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/c77a3605c/0884a254bcd04cd584c0372e80aad513/FLAG46549641a [2021-11-25 19:53:06,435 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:53:06,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-25 19:53:06,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/c77a3605c/0884a254bcd04cd584c0372e80aad513/FLAG46549641a [2021-11-25 19:53:06,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/c77a3605c/0884a254bcd04cd584c0372e80aad513 [2021-11-25 19:53:06,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:53:06,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:53:06,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:53:06,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:53:06,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:53:06,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:53:06" (1/1) ... [2021-11-25 19:53:06,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11413479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:06, skipping insertion in model container [2021-11-25 19:53:06,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:53:06" (1/1) ... [2021-11-25 19:53:06,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:53:06,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:53:07,164 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-25 19:53:07,334 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-25 19:53:07,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:53:07,375 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) [2021-11-25 19:53:07,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e2be292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:07, skipping insertion in model container [2021-11-25 19:53:07,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:53:07,376 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 19:53:07,378 INFO L158 Benchmark]: Toolchain (without parser) took 802.01ms. Allocated memory is still 136.3MB. Free memory was 92.6MB in the beginning and 98.2MB in the end (delta: -5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:53:07,379 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 136.3MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:53:07,380 INFO L158 Benchmark]: CACSL2BoogieTranslator took 799.27ms. Allocated memory is still 136.3MB. Free memory was 92.5MB in the beginning and 98.2MB in the end (delta: -5.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:53:07,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 136.3MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 799.27ms. Allocated memory is still 136.3MB. Free memory was 92.5MB in the beginning and 98.2MB in the end (delta: -5.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7 --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 d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:53:09,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:53:09,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:53:09,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:53:09,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:53:09,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:53:09,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:53:09,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:53:09,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:53:09,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:53:09,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:53:09,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:53:09,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:53:09,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:53:09,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:53:09,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:53:09,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:53:09,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:53:09,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:53:09,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:53:09,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:53:09,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:53:09,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:53:09,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:53:09,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:53:09,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:53:09,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:53:09,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:53:09,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:53:09,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:53:09,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:53:09,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:53:09,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:53:09,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:53:09,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:53:09,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:53:09,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:53:09,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:53:09,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:53:09,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:53:09,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:53:09,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 19:53:10,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:53:10,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:53:10,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:53:10,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:53:10,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:53:10,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:53:10,030 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:53:10,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:53:10,030 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:53:10,031 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:53:10,031 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:53:10,031 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:53:10,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:53:10,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:53:10,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:53:10,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:53:10,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:53:10,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:53:10,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:53:10,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:53:10,034 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:53:10,034 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:53:10,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:53:10,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:53:10,035 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:53:10,035 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:53:10,035 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:53:10,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:53:10,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:53:10,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:53:10,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:53:10,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:53:10,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:53:10,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:53:10,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:53:10,037 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:53:10,039 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:10,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:53:10,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:53:10,040 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d [2021-11-25 19:53:10,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:53:10,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:53:10,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:53:10,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:53:10,504 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:53:10,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-25 19:53:10,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/4a99e8acc/43e2fc4f70a74917ae189886b3d22fef/FLAG6ea155380 [2021-11-25 19:53:11,471 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:53:11,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-25 19:53:11,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/4a99e8acc/43e2fc4f70a74917ae189886b3d22fef/FLAG6ea155380 [2021-11-25 19:53:11,608 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/data/4a99e8acc/43e2fc4f70a74917ae189886b3d22fef [2021-11-25 19:53:11,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:53:11,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:53:11,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:53:11,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:53:11,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:53:11,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:53:11" (1/1) ... [2021-11-25 19:53:11,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dee512a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:11, skipping insertion in model container [2021-11-25 19:53:11,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:53:11" (1/1) ... [2021-11-25 19:53:11,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:53:11,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:53:12,259 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-25 19:53:12,387 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-25 19:53:12,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:53:12,416 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 19:53:12,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:53:12,468 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-25 19:53:12,589 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-25 19:53:12,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:53:12,610 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:53:12,661 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-25 19:53:12,722 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_565f42d1-9e13-4c91-95c8-d35d39e8601a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-25 19:53:12,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:53:12,787 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:53:12,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12 WrapperNode [2021-11-25 19:53:12,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:53:12,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:53:12,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:53:12,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:53:12,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:12,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:12,989 INFO L137 Inliner]: procedures = 180, calls = 336, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1205 [2021-11-25 19:53:12,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:53:12,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:53:12,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:53:12,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:53:13,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:53:13,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:53:13,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:53:13,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:53:13,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (1/1) ... [2021-11-25 19:53:13,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:53:13,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:13,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:53:13,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:53:13,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 19:53:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:53:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:53:13,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:53:13,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:53:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:53:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:53:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:53:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:53:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:53:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 19:53:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:53:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:53:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:53:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:53:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:53:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:53:13,601 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:53:13,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:53:13,608 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:53:19,719 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:53:19,759 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:53:19,760 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-25 19:53:19,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:53:19 BoogieIcfgContainer [2021-11-25 19:53:19,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:53:19,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:53:19,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:53:19,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:53:19,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:53:11" (1/3) ... [2021-11-25 19:53:19,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48317cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:53:19, skipping insertion in model container [2021-11-25 19:53:19,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:12" (2/3) ... [2021-11-25 19:53:19,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48317cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:53:19, skipping insertion in model container [2021-11-25 19:53:19,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:53:19" (3/3) ... [2021-11-25 19:53:19,772 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test3-2.i [2021-11-25 19:53:19,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:53:19,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 639 error locations. [2021-11-25 19:53:19,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:53:19,839 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 [2021-11-25 19:53:19,839 INFO L340 AbstractCegarLoop]: Starting to check reachability of 639 error locations. [2021-11-25 19:53:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 1271 states, 624 states have (on average 2.2580128205128207) internal successors, (1409), 1265 states have internal predecessors, (1409), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:53:19,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:19,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:53:19,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-25 19:53:19,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:19,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487870773] [2021-11-25 19:53:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:19,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:19,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:19,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:19,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:53:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:53:20,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:20,259 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 [2021-11-25 19:53:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:20,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:20,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:20,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487870773] [2021-11-25 19:53:20,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487870773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:20,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:20,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:53:20,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682950729] [2021-11-25 19:53:20,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:20,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:20,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:20,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:20,354 INFO L87 Difference]: Start difference. First operand has 1271 states, 624 states have (on average 2.2580128205128207) internal successors, (1409), 1265 states have internal predecessors, (1409), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) 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) [2021-11-25 19:53:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:23,146 INFO L93 Difference]: Finished difference Result 1443 states and 1528 transitions. [2021-11-25 19:53:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:23,149 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 [2021-11-25 19:53:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:23,199 INFO L225 Difference]: With dead ends: 1443 [2021-11-25 19:53:23,199 INFO L226 Difference]: Without dead ends: 1441 [2021-11-25 19:53:23,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:23,208 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1181 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:23,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 928 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:53:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-25 19:53:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1256. [2021-11-25 19:53:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 624 states have (on average 2.110576923076923) internal successors, (1317), 1250 states have internal predecessors, (1317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1333 transitions. [2021-11-25 19:53:23,337 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1333 transitions. Word has length 3 [2021-11-25 19:53:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:23,338 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1333 transitions. [2021-11-25 19:53:23,338 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) [2021-11-25 19:53:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1333 transitions. [2021-11-25 19:53:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:53:23,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:23,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:53:23,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:23,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:23,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-25 19:53:23,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:23,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611031365] [2021-11-25 19:53:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:23,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:23,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:23,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:23,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:53:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:53:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:23,717 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 [2021-11-25 19:53:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:23,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:23,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611031365] [2021-11-25 19:53:23,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611031365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:23,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:23,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:53:23,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554557547] [2021-11-25 19:53:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:23,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:23,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:23,740 INFO L87 Difference]: Start difference. First operand 1256 states and 1333 transitions. 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) [2021-11-25 19:53:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:27,927 INFO L93 Difference]: Finished difference Result 1865 states and 1993 transitions. [2021-11-25 19:53:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:27,928 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 [2021-11-25 19:53:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:27,941 INFO L225 Difference]: With dead ends: 1865 [2021-11-25 19:53:27,941 INFO L226 Difference]: Without dead ends: 1865 [2021-11-25 19:53:27,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:27,943 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 650 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:27,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1750 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 19:53:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-11-25 19:53:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1456. [2021-11-25 19:53:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 825 states have (on average 2.0957575757575757) internal successors, (1729), 1450 states have internal predecessors, (1729), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1745 transitions. [2021-11-25 19:53:27,997 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1745 transitions. Word has length 3 [2021-11-25 19:53:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:27,997 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1745 transitions. [2021-11-25 19:53:27,997 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) [2021-11-25 19:53:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1745 transitions. [2021-11-25 19:53:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:53:27,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:27,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:28,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:28,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:28,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2021-11-25 19:53:28,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:28,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379936380] [2021-11-25 19:53:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:28,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:28,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:28,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:53:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:53:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:28,459 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 [2021-11-25 19:53:28,468 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 [2021-11-25 19:53:28,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:28,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:28,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:53:28,601 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 16 treesize of output 16 [2021-11-25 19:53:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:28,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:28,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:28,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379936380] [2021-11-25 19:53:28,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379936380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:28,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:28,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:28,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188932431] [2021-11-25 19:53:28,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:28,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:28,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:28,644 INFO L87 Difference]: Start difference. First operand 1456 states and 1745 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:32,706 INFO L93 Difference]: Finished difference Result 1634 states and 1934 transitions. [2021-11-25 19:53:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:53:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 19:53:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:32,717 INFO L225 Difference]: With dead ends: 1634 [2021-11-25 19:53:32,717 INFO L226 Difference]: Without dead ends: 1634 [2021-11-25 19:53:32,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:32,719 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 2629 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:32,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 535 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 19:53:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-11-25 19:53:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1245. [2021-11-25 19:53:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 624 states have (on average 2.0913461538461537) internal successors, (1305), 1239 states have internal predecessors, (1305), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1321 transitions. [2021-11-25 19:53:32,756 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1321 transitions. Word has length 7 [2021-11-25 19:53:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:32,757 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1321 transitions. [2021-11-25 19:53:32,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1321 transitions. [2021-11-25 19:53:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:53:32,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:32,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:32,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:32,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:32,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-25 19:53:32,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:32,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627218732] [2021-11-25 19:53:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:32,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:32,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:33,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:53:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:33,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:53:33,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:33,155 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 [2021-11-25 19:53:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:33,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:33,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627218732] [2021-11-25 19:53:33,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627218732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:33,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:33,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:53:33,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856386043] [2021-11-25 19:53:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:33,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:33,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:33,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:33,178 INFO L87 Difference]: Start difference. First operand 1245 states and 1321 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) [2021-11-25 19:53:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:35,744 INFO L93 Difference]: Finished difference Result 1572 states and 1677 transitions. [2021-11-25 19:53:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:35,746 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 [2021-11-25 19:53:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:35,757 INFO L225 Difference]: With dead ends: 1572 [2021-11-25 19:53:35,757 INFO L226 Difference]: Without dead ends: 1572 [2021-11-25 19:53:35,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:35,759 INFO L933 BasicCegarLoop]: 1163 mSDtfsCounter, 990 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:35,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1509 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:53:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-25 19:53:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1196. [2021-11-25 19:53:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 624 states have (on average 2.0128205128205128) internal successors, (1256), 1190 states have internal predecessors, (1256), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1272 transitions. [2021-11-25 19:53:35,799 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1272 transitions. Word has length 8 [2021-11-25 19:53:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:35,800 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1272 transitions. [2021-11-25 19:53:35,800 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) [2021-11-25 19:53:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1272 transitions. [2021-11-25 19:53:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:53:35,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:35,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:35,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:36,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:36,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-25 19:53:36,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393068794] [2021-11-25 19:53:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:36,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:36,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:36,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:53:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:53:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:36,203 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 [2021-11-25 19:53:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:36,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:36,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393068794] [2021-11-25 19:53:36,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393068794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:36,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:36,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:53:36,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131693619] [2021-11-25 19:53:36,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:36,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:36,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:36,245 INFO L87 Difference]: Start difference. First operand 1196 states and 1272 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) [2021-11-25 19:53:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:39,765 INFO L93 Difference]: Finished difference Result 1650 states and 1758 transitions. [2021-11-25 19:53:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:39,766 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 [2021-11-25 19:53:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:39,775 INFO L225 Difference]: With dead ends: 1650 [2021-11-25 19:53:39,775 INFO L226 Difference]: Without dead ends: 1650 [2021-11-25 19:53:39,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:39,776 INFO L933 BasicCegarLoop]: 1372 mSDtfsCounter, 673 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:39,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1914 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:53:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-11-25 19:53:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1218. [2021-11-25 19:53:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 656 states have (on average 2.0) internal successors, (1312), 1212 states have internal predecessors, (1312), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1328 transitions. [2021-11-25 19:53:39,811 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1328 transitions. Word has length 8 [2021-11-25 19:53:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:39,812 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1328 transitions. [2021-11-25 19:53:39,812 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) [2021-11-25 19:53:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1328 transitions. [2021-11-25 19:53:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:53:39,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:39,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:39,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:40,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:40,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash 871377621, now seen corresponding path program 1 times [2021-11-25 19:53:40,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:40,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979390725] [2021-11-25 19:53:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:40,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:40,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:40,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:40,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 19:53:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:53:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:40,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:40,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979390725] [2021-11-25 19:53:40,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979390725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:40,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:40,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:53:40,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500012827] [2021-11-25 19:53:40,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:40,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:40,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:40,311 INFO L87 Difference]: Start difference. First operand 1218 states and 1328 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:41,365 INFO L93 Difference]: Finished difference Result 1864 states and 2017 transitions. [2021-11-25 19:53:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:53:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-11-25 19:53:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:41,375 INFO L225 Difference]: With dead ends: 1864 [2021-11-25 19:53:41,376 INFO L226 Difference]: Without dead ends: 1864 [2021-11-25 19:53:41,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:41,377 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 753 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 3739 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:41,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 3739 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:53:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-25 19:53:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1462. [2021-11-25 19:53:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 900 states have (on average 1.9677777777777778) internal successors, (1771), 1456 states have internal predecessors, (1771), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1787 transitions. [2021-11-25 19:53:41,423 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1787 transitions. Word has length 11 [2021-11-25 19:53:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:41,423 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1787 transitions. [2021-11-25 19:53:41,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1787 transitions. [2021-11-25 19:53:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:53:41,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:41,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:41,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:41,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2021-11-25 19:53:41,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:41,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695160739] [2021-11-25 19:53:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:41,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:41,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:41,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:53:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:53:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:41,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:41,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:41,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695160739] [2021-11-25 19:53:41,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695160739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:41,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:41,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:41,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057564431] [2021-11-25 19:53:41,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:41,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:41,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:41,857 INFO L87 Difference]: Start difference. First operand 1462 states and 1787 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:53:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:41,911 INFO L93 Difference]: Finished difference Result 1643 states and 1965 transitions. [2021-11-25 19:53:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 13 [2021-11-25 19:53:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:41,923 INFO L225 Difference]: With dead ends: 1643 [2021-11-25 19:53:41,923 INFO L226 Difference]: Without dead ends: 1643 [2021-11-25 19:53:41,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:41,925 INFO L933 BasicCegarLoop]: 1221 mSDtfsCounter, 602 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:41,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 2072 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:53:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-25 19:53:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1402. [2021-11-25 19:53:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 864 states have (on average 1.9502314814814814) internal successors, (1685), 1396 states have internal predecessors, (1685), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1701 transitions. [2021-11-25 19:53:41,974 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1701 transitions. Word has length 13 [2021-11-25 19:53:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:41,975 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1701 transitions. [2021-11-25 19:53:41,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:53:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1701 transitions. [2021-11-25 19:53:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:53:41,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:41,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:41,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:42,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:42,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr364REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash -459414345, now seen corresponding path program 1 times [2021-11-25 19:53:42,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:42,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821792783] [2021-11-25 19:53:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:42,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:42,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:42,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 19:53:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:53:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:42,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:42,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821792783] [2021-11-25 19:53:42,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821792783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:42,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:42,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:53:42,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614513980] [2021-11-25 19:53:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:42,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:42,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:42,428 INFO L87 Difference]: Start difference. First operand 1402 states and 1701 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:42,534 INFO L93 Difference]: Finished difference Result 1615 states and 1909 transitions. [2021-11-25 19:53:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:53:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-25 19:53:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:42,545 INFO L225 Difference]: With dead ends: 1615 [2021-11-25 19:53:42,545 INFO L226 Difference]: Without dead ends: 1615 [2021-11-25 19:53:42,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:42,546 INFO L933 BasicCegarLoop]: 1176 mSDtfsCounter, 573 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:42,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 3196 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:53:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-11-25 19:53:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1372. [2021-11-25 19:53:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 848 states have (on average 1.9186320754716981) internal successors, (1627), 1366 states have internal predecessors, (1627), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1643 transitions. [2021-11-25 19:53:42,592 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1643 transitions. Word has length 15 [2021-11-25 19:53:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:42,592 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1643 transitions. [2021-11-25 19:53:42,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1643 transitions. [2021-11-25 19:53:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:53:42,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:42,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:42,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:42,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:42,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr637ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 552252916, now seen corresponding path program 1 times [2021-11-25 19:53:42,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:42,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372714201] [2021-11-25 19:53:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:42,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:42,811 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:42,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 19:53:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:53:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:43,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:53:43,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:53:43,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:53:43,103 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 19:53:43,103 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 [2021-11-25 19:53:43,178 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 19:53:43,179 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 [2021-11-25 19:53:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:43,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:43,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:43,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372714201] [2021-11-25 19:53:43,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372714201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:43,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:43,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:53:43,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294887333] [2021-11-25 19:53:43,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:43,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:43,223 INFO L87 Difference]: Start difference. First operand 1372 states and 1643 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-11-25 19:53:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:44,798 INFO L93 Difference]: Finished difference Result 1826 states and 2167 transitions. [2021-11-25 19:53:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:53:44,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 16 [2021-11-25 19:53:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:44,808 INFO L225 Difference]: With dead ends: 1826 [2021-11-25 19:53:44,808 INFO L226 Difference]: Without dead ends: 1826 [2021-11-25 19:53:44,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:44,809 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 443 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 3307 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:44,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 3307 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:53:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-11-25 19:53:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1371. [2021-11-25 19:53:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 847 states have (on average 1.9185360094451003) internal successors, (1625), 1365 states have internal predecessors, (1625), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1641 transitions. [2021-11-25 19:53:44,848 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1641 transitions. Word has length 16 [2021-11-25 19:53:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 1641 transitions. [2021-11-25 19:53:44,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-11-25 19:53:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1641 transitions. [2021-11-25 19:53:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:53:44,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:44,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:44,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:45,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:45,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-25 19:53:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022024420] [2021-11-25 19:53:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:45,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:45,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:45,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:53:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:53:45,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:45,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:45,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022024420] [2021-11-25 19:53:45,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022024420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:45,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:45,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:45,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517577540] [2021-11-25 19:53:45,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:45,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:45,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:45,302 INFO L87 Difference]: Start difference. First operand 1371 states and 1641 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:45,331 INFO L93 Difference]: Finished difference Result 1311 states and 1555 transitions. [2021-11-25 19:53:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-25 19:53:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:45,337 INFO L225 Difference]: With dead ends: 1311 [2021-11-25 19:53:45,337 INFO L226 Difference]: Without dead ends: 1311 [2021-11-25 19:53:45,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:45,338 INFO L933 BasicCegarLoop]: 1137 mSDtfsCounter, 1106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:45,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1169 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:53:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-11-25 19:53:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1311. [2021-11-25 19:53:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 811 states have (on average 1.8976572133168927) internal successors, (1539), 1305 states have internal predecessors, (1539), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1555 transitions. [2021-11-25 19:53:45,368 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1555 transitions. Word has length 18 [2021-11-25 19:53:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:45,369 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1555 transitions. [2021-11-25 19:53:45,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1555 transitions. [2021-11-25 19:53:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:53:45,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:45,370 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] [2021-11-25 19:53:45,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:45,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:45,583 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-25 19:53:45,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:45,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437379382] [2021-11-25 19:53:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:45,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:45,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:45,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 19:53:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:53:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:45,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:45,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:45,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437379382] [2021-11-25 19:53:45,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437379382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:45,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:45,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:53:45,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132682326] [2021-11-25 19:53:45,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:45,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:45,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:45,859 INFO L87 Difference]: Start difference. First operand 1311 states and 1555 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:45,938 INFO L93 Difference]: Finished difference Result 1283 states and 1499 transitions. [2021-11-25 19:53:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:53:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-11-25 19:53:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:45,946 INFO L225 Difference]: With dead ends: 1283 [2021-11-25 19:53:45,946 INFO L226 Difference]: Without dead ends: 1283 [2021-11-25 19:53:45,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:45,947 INFO L933 BasicCegarLoop]: 1092 mSDtfsCounter, 1077 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:45,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 2209 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:53:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-11-25 19:53:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1281. [2021-11-25 19:53:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 795 states have (on average 1.8628930817610063) internal successors, (1481), 1275 states have internal predecessors, (1481), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1497 transitions. [2021-11-25 19:53:45,974 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1497 transitions. Word has length 20 [2021-11-25 19:53:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:45,974 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1497 transitions. [2021-11-25 19:53:45,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1497 transitions. [2021-11-25 19:53:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:53:45,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:45,976 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] [2021-11-25 19:53:45,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:46,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:46,188 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-25 19:53:46,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:46,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576754180] [2021-11-25 19:53:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:46,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:46,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:46,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:46,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 19:53:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:53:46,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:46,404 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 [2021-11-25 19:53:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:46,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:46,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:46,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576754180] [2021-11-25 19:53:46,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576754180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:46,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:46,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:46,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938232941] [2021-11-25 19:53:46,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:46,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:46,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:46,533 INFO L87 Difference]: Start difference. First operand 1281 states and 1497 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:49,663 INFO L93 Difference]: Finished difference Result 1880 states and 2230 transitions. [2021-11-25 19:53:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:53:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-25 19:53:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:49,674 INFO L225 Difference]: With dead ends: 1880 [2021-11-25 19:53:49,674 INFO L226 Difference]: Without dead ends: 1880 [2021-11-25 19:53:49,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:49,675 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1768 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:49,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1773 Valid, 1271 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:53:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-11-25 19:53:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1277. [2021-11-25 19:53:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 795 states have (on average 1.8528301886792453) internal successors, (1473), 1271 states have internal predecessors, (1473), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1489 transitions. [2021-11-25 19:53:49,717 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1489 transitions. Word has length 34 [2021-11-25 19:53:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:49,718 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1489 transitions. [2021-11-25 19:53:49,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1489 transitions. [2021-11-25 19:53:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:53:49,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:49,721 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] [2021-11-25 19:53:49,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:49,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:49,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-25 19:53:49,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389365663] [2021-11-25 19:53:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:49,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:49,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:49,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:53:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:53:50,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:50,175 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 [2021-11-25 19:53:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:50,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:50,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389365663] [2021-11-25 19:53:50,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389365663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:50,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:50,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:50,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519142319] [2021-11-25 19:53:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:50,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:50,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:50,457 INFO L87 Difference]: Start difference. First operand 1277 states and 1489 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:54,932 INFO L93 Difference]: Finished difference Result 2008 states and 2337 transitions. [2021-11-25 19:53:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:53:54,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-25 19:53:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:54,942 INFO L225 Difference]: With dead ends: 2008 [2021-11-25 19:53:54,942 INFO L226 Difference]: Without dead ends: 2008 [2021-11-25 19:53:54,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:54,943 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 1230 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:54,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 2582 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 19:53:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-11-25 19:53:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1273. [2021-11-25 19:53:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 795 states have (on average 1.8427672955974843) internal successors, (1465), 1267 states have internal predecessors, (1465), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1481 transitions. [2021-11-25 19:53:54,973 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1481 transitions. Word has length 34 [2021-11-25 19:53:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:54,974 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 1481 transitions. [2021-11-25 19:53:54,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1481 transitions. [2021-11-25 19:53:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:53:54,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:54,976 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] [2021-11-25 19:53:54,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-25 19:53:55,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:55,190 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-25 19:53:55,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:55,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561882398] [2021-11-25 19:53:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:55,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:55,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:55,193 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:55,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 19:53:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:53:55,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:55,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:55,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:55,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561882398] [2021-11-25 19:53:55,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561882398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:55,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:55,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:53:55,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886384706] [2021-11-25 19:53:55,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:55,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:55,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:55,678 INFO L87 Difference]: Start difference. First operand 1273 states and 1481 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:55,758 INFO L93 Difference]: Finished difference Result 1261 states and 1461 transitions. [2021-11-25 19:53:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:53:55,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-25 19:53:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:55,769 INFO L225 Difference]: With dead ends: 1261 [2021-11-25 19:53:55,769 INFO L226 Difference]: Without dead ends: 1261 [2021-11-25 19:53:55,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:55,770 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 1053 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:55,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 2187 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:53:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-11-25 19:53:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1261. [2021-11-25 19:53:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 783 states have (on average 1.8454661558109835) internal successors, (1445), 1255 states have internal predecessors, (1445), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:53:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1461 transitions. [2021-11-25 19:53:55,797 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1461 transitions. Word has length 52 [2021-11-25 19:53:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1461 transitions. [2021-11-25 19:53:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:53:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1461 transitions. [2021-11-25 19:53:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:53:55,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:55,802 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] [2021-11-25 19:53:55,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:56,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:56,024 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:53:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-25 19:53:56,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:56,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820996378] [2021-11-25 19:53:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:56,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:56,027 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:56,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 19:53:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:56,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:53:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:56,534 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 [2021-11-25 19:53:56,541 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 [2021-11-25 19:53:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:57,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:57,291 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:53:57,292 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 16 treesize of output 16 [2021-11-25 19:53:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:57,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:57,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820996378] [2021-11-25 19:53:57,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820996378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:57,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:57,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:57,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623254222] [2021-11-25 19:53:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:57,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:57,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:57,315 INFO L87 Difference]: Start difference. First operand 1261 states and 1461 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:00,483 INFO L93 Difference]: Finished difference Result 1609 states and 1926 transitions. [2021-11-25 19:54:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:54:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 19:54:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:00,495 INFO L225 Difference]: With dead ends: 1609 [2021-11-25 19:54:00,495 INFO L226 Difference]: Without dead ends: 1609 [2021-11-25 19:54:00,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:54:00,496 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1106 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:00,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 876 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:54:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-11-25 19:54:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1191. [2021-11-25 19:54:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 751 states have (on average 1.785619174434088) internal successors, (1341), 1185 states have internal predecessors, (1341), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:54:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1357 transitions. [2021-11-25 19:54:00,525 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1357 transitions. Word has length 60 [2021-11-25 19:54:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:00,526 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1357 transitions. [2021-11-25 19:54:00,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1357 transitions. [2021-11-25 19:54:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:54:00,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:00,528 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] [2021-11-25 19:54:00,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:00,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:54:00,745 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:54:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-25 19:54:00,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:00,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392952674] [2021-11-25 19:54:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:00,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:00,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:00,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:00,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:54:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:54:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:01,178 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 [2021-11-25 19:54:01,196 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 [2021-11-25 19:54:01,239 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 27 treesize of output 15 [2021-11-25 19:54:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:01,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:01,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392952674] [2021-11-25 19:54:01,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392952674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:01,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:01,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:54:01,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604093206] [2021-11-25 19:54:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:54:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:54:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:01,257 INFO L87 Difference]: Start difference. First operand 1191 states and 1357 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:04,707 INFO L93 Difference]: Finished difference Result 1190 states and 1356 transitions. [2021-11-25 19:54:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:54:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-25 19:54:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:04,716 INFO L225 Difference]: With dead ends: 1190 [2021-11-25 19:54:04,716 INFO L226 Difference]: Without dead ends: 1190 [2021-11-25 19:54:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:04,717 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 4 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:04,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2684 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 19:54:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-25 19:54:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2021-11-25 19:54:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 751 states have (on average 1.7842876165113182) internal successors, (1340), 1184 states have internal predecessors, (1340), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:54:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1356 transitions. [2021-11-25 19:54:04,739 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1356 transitions. Word has length 65 [2021-11-25 19:54:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:04,740 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1356 transitions. [2021-11-25 19:54:04,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1356 transitions. [2021-11-25 19:54:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:54:04,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:04,741 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] [2021-11-25 19:54:04,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:04,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:54:04,956 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:54:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-25 19:54:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:04,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497873994] [2021-11-25 19:54:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:04,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:04,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:04,958 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:04,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 19:54:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:54:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:05,461 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 [2021-11-25 19:54:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 19:54:05,507 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 [2021-11-25 19:54:05,583 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 21 treesize of output 9 [2021-11-25 19:54:05,588 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 19 treesize of output 7 [2021-11-25 19:54:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:05,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:05,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:05,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497873994] [2021-11-25 19:54:05,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497873994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:05,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:05,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:54:05,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612935891] [2021-11-25 19:54:05,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:05,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:54:05,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:05,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:54:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:05,616 INFO L87 Difference]: Start difference. First operand 1190 states and 1356 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:09,549 INFO L93 Difference]: Finished difference Result 1189 states and 1355 transitions. [2021-11-25 19:54:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:54:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-25 19:54:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:09,556 INFO L225 Difference]: With dead ends: 1189 [2021-11-25 19:54:09,556 INFO L226 Difference]: Without dead ends: 1189 [2021-11-25 19:54:09,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:09,557 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 2 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:09,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2737 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 19:54:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-25 19:54:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2021-11-25 19:54:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 750 states have (on average 1.7853333333333334) internal successors, (1339), 1183 states have internal predecessors, (1339), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:54:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1355 transitions. [2021-11-25 19:54:09,580 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1355 transitions. Word has length 65 [2021-11-25 19:54:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:09,581 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1355 transitions. [2021-11-25 19:54:09,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1355 transitions. [2021-11-25 19:54:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:54:09,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:09,582 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] [2021-11-25 19:54:09,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:09,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:54:09,798 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:54:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash 231575279, now seen corresponding path program 1 times [2021-11-25 19:54:09,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:09,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630088323] [2021-11-25 19:54:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:09,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:09,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:09,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 19:54:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:10,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:54:10,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:10,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:10,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630088323] [2021-11-25 19:54:10,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630088323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:10,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:10,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:54:10,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690155075] [2021-11-25 19:54:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:10,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:10,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:54:10,310 INFO L87 Difference]: Start difference. First operand 1189 states and 1355 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:54:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:10,371 INFO L93 Difference]: Finished difference Result 1192 states and 1359 transitions. [2021-11-25 19:54:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:54:10,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-11-25 19:54:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:10,384 INFO L225 Difference]: With dead ends: 1192 [2021-11-25 19:54:10,384 INFO L226 Difference]: Without dead ends: 1192 [2021-11-25 19:54:10,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:10,386 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 2 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:10,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3133 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:54:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-11-25 19:54:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2021-11-25 19:54:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 752 states have (on average 1.7845744680851063) internal successors, (1342), 1186 states have internal predecessors, (1342), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 19:54:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1359 transitions. [2021-11-25 19:54:10,421 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1359 transitions. Word has length 73 [2021-11-25 19:54:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:10,421 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1359 transitions. [2021-11-25 19:54:10,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:54:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1359 transitions. [2021-11-25 19:54:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:54:10,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:10,424 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] [2021-11-25 19:54:10,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:10,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:54:10,640 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:54:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -695791212, now seen corresponding path program 1 times [2021-11-25 19:54:10,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:10,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742118966] [2021-11-25 19:54:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:10,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:10,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:10,642 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:10,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:54:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:54:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:11,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:11,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:11,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742118966] [2021-11-25 19:54:11,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742118966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:11,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [6004658] [2021-11-25 19:54:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:11,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:11,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:54:11,417 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:54:11,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 19:54:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:11,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:54:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:12,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:12,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [6004658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:12,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111321316] [2021-11-25 19:54:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:12,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:12,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:12,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:12,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:54:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:54:12,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:12,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:12,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111321316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:12,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:54:12,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 19:54:12,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367242981] [2021-11-25 19:54:12,812 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:12,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:54:12,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:54:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:54:12,814 INFO L87 Difference]: Start difference. First operand 1192 states and 1359 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2021-11-25 19:54:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:13,065 INFO L93 Difference]: Finished difference Result 1204 states and 1376 transitions. [2021-11-25 19:54:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:54:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 74 [2021-11-25 19:54:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:13,072 INFO L225 Difference]: With dead ends: 1204 [2021-11-25 19:54:13,072 INFO L226 Difference]: Without dead ends: 1204 [2021-11-25 19:54:13,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:54:13,074 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 15 mSDsluCounter, 3130 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4177 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:13,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4177 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-25 19:54:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1202. [2021-11-25 19:54:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 761 states have (on average 1.783180026281209) internal successors, (1357), 1195 states have internal predecessors, (1357), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 19:54:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1374 transitions. [2021-11-25 19:54:13,103 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1374 transitions. Word has length 74 [2021-11-25 19:54:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:13,103 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1374 transitions. [2021-11-25 19:54:13,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2021-11-25 19:54:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1374 transitions. [2021-11-25 19:54:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:54:13,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:13,105 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:13,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:13,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:13,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:13,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:13,719 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:54:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 829132847, now seen corresponding path program 2 times [2021-11-25 19:54:13,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433765188] [2021-11-25 19:54:13,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:54:13,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:13,721 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:13,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 19:54:14,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:54:14,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:14,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:54:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:14,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:14,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:14,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433765188] [2021-11-25 19:54:14,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433765188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:14,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127493750] [2021-11-25 19:54:14,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:54:14,821 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:14,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:54:14,822 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:54:14,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 19:54:16,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:54:16,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:54:16,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:16,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:17,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [127493750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:17,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030695311] [2021-11-25 19:54:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:54:17,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:17,162 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:17,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 19:54:38,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:54:38,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:54:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:38,226 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 [2021-11-25 19:54:38,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:54:38,446 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 15 treesize of output 15 [2021-11-25 19:54:38,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:54:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:54:38,541 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 [2021-11-25 19:54:38,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 19:54:38,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 19:54:38,868 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1651 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1651) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1652 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1652) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 19:54:39,006 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1655 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1655) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1656) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 19:54:39,029 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1658 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1658))) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1657) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 19:54:39,146 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:54:39,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 19:54:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 19:54:39,267 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 31 treesize of output 13 [2021-11-25 19:54:39,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:54:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 19:54:39,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:39,835 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1670 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1669 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1670) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1669) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_1670 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1670) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2021-11-25 19:54:39,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030695311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:39,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:54:39,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11] total 24 [2021-11-25 19:54:39,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306683776] [2021-11-25 19:54:39,846 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:39,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:54:39,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:54:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=416, Unknown=15, NotChecked=180, Total=702 [2021-11-25 19:54:39,848 INFO L87 Difference]: Start difference. First operand 1202 states and 1374 transitions. Second operand has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:54:41,187 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c_#Ultimate.C_memset_#amount| (_ bv44 32))) (exists ((v_ArrVal_1658 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1658))) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1657) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 19:54:41,926 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1658 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1658))) (exists ((v_ArrVal_1655 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1655) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1657) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1656) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 19:54:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:52,796 INFO L93 Difference]: Finished difference Result 1619 states and 1920 transitions. [2021-11-25 19:54:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 19:54:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2021-11-25 19:54:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:52,803 INFO L225 Difference]: With dead ends: 1619 [2021-11-25 19:54:52,803 INFO L226 Difference]: Without dead ends: 1613 [2021-11-25 19:54:52,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=311, Invalid=1459, Unknown=60, NotChecked=522, Total=2352 [2021-11-25 19:54:52,805 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 743 mSDsluCounter, 7030 mSDsCounter, 0 mSdLazyCounter, 5332 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 7708 SdHoareTripleChecker+Invalid, 11361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6010 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:52,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 7708 Invalid, 11361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5332 Invalid, 0 Unknown, 6010 Unchecked, 11.0s Time] [2021-11-25 19:54:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-25 19:54:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1217. [2021-11-25 19:54:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 775 states have (on average 1.7754838709677419) internal successors, (1376), 1209 states have internal predecessors, (1376), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-25 19:54:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1394 transitions. [2021-11-25 19:54:52,836 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1394 transitions. Word has length 77 [2021-11-25 19:54:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1394 transitions. [2021-11-25 19:54:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:54:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1394 transitions. [2021-11-25 19:54:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:54:52,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:52,839 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:52,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-25 19:54:53,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:53,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:53,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:53,454 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:54:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1210450157, now seen corresponding path program 1 times [2021-11-25 19:54:53,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:53,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705163911] [2021-11-25 19:54:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:53,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:53,456 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:53,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 19:54:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:53,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:54:53,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:54,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:54,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705163911] [2021-11-25 19:54:54,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705163911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [939042514] [2021-11-25 19:54:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:54,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:54,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:54:54,890 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:54:54,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 19:54:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:55,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:54:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:55,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:56,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [939042514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442841769] [2021-11-25 19:54:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:56,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:56,222 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:56,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 19:54:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:54:56,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442841769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:58,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:54:58,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 35 [2021-11-25 19:54:58,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135520770] [2021-11-25 19:54:58,015 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:58,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 19:54:58,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 19:54:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:54:58,018 INFO L87 Difference]: Start difference. First operand 1217 states and 1394 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2021-11-25 19:55:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:55:01,480 INFO L93 Difference]: Finished difference Result 1250 states and 1436 transitions. [2021-11-25 19:55:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 19:55:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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 82 [2021-11-25 19:55:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:55:01,486 INFO L225 Difference]: With dead ends: 1250 [2021-11-25 19:55:01,486 INFO L226 Difference]: Without dead ends: 1242 [2021-11-25 19:55:01,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1371, Invalid=2789, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 19:55:01,489 INFO L933 BasicCegarLoop]: 1054 mSDtfsCounter, 134 mSDsluCounter, 14678 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 15732 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:55:01,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 15732 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:55:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-11-25 19:55:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1226. [2021-11-25 19:55:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 785 states have (on average 1.7668789808917198) internal successors, (1387), 1219 states have internal predecessors, (1387), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 19:55:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1404 transitions. [2021-11-25 19:55:01,524 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1404 transitions. Word has length 82 [2021-11-25 19:55:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:55:01,525 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1404 transitions. [2021-11-25 19:55:01,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2021-11-25 19:55:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1404 transitions. [2021-11-25 19:55:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 19:55:01,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:01,527 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:55:01,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 19:55:01,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-25 19:55:01,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:55:02,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:55:02,142 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 19:55:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash 690574639, now seen corresponding path program 3 times [2021-11-25 19:55:02,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:55:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051333733] [2021-11-25 19:55:02,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:55:02,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:55:02,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:55:02,145 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:55:02,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 19:55:03,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 19:55:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:55:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:55:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:07,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:55:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051333733] [2021-11-25 19:55:07,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051333733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:55:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55011603] [2021-11-25 19:55:07,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:55:07,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:55:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:55:07,064 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:55:07,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-25 19:55:33,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 19:55:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:55:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:55:33,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:34,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:34,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55011603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:55:34,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77910204] [2021-11-25 19:55:34,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:55:34,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:55:34,918 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:55:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_565f42d1-9e13-4c91-95c8-d35d39e8601a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process