./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8 --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 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:27:10,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:27:10,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:27:10,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:27:10,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:27:10,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:27:10,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:27:10,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:27:10,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:27:10,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:27:10,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:27:10,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:27:10,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:27:10,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:27:10,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:27:10,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:27:10,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:27:10,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:27:11,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:27:11,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:27:11,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:27:11,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:27:11,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:27:11,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:27:11,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:27:11,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:27:11,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:27:11,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:27:11,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:27:11,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:27:11,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:27:11,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:27:11,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:27:11,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:27:11,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:27:11,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:27:11,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:27:11,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:27:11,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:27:11,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:27:11,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:27:11,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:27:11,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:27:11,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:27:11,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:27:11,054 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:27:11,054 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:27:11,055 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:27:11,055 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:27:11,055 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:27:11,055 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:27:11,055 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:27:11,056 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:27:11,056 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:27:11,056 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:27:11,056 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:27:11,057 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:27:11,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:27:11,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:27:11,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:27:11,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:27:11,058 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:27:11,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:27:11,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:27:11,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:27:11,059 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:27:11,059 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:27:11,059 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:27:11,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:27:11,060 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:27:11,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:27:11,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:27:11,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:27:11,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:27:11,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:11,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:27:11,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:27:11,061 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:27:11,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:27:11,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:27:11,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:27:11,062 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_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 [2021-11-07 01:27:11,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:27:11,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:27:11,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:27:11,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:27:11,378 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:27:11,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-11-07 01:27:11,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/edb0b88ff/a557eac718594c85b3cf2fad75731860/FLAGe787fc023 [2021-11-07 01:27:12,061 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:27:12,062 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-11-07 01:27:12,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/edb0b88ff/a557eac718594c85b3cf2fad75731860/FLAGe787fc023 [2021-11-07 01:27:12,329 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/edb0b88ff/a557eac718594c85b3cf2fad75731860 [2021-11-07 01:27:12,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:27:12,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:27:12,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:12,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:27:12,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:27:12,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:12" (1/1) ... [2021-11-07 01:27:12,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7995331e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:12, skipping insertion in model container [2021-11-07 01:27:12,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:12" (1/1) ... [2021-11-07 01:27:12,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:27:12,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:12,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:12,879 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) [2021-11-07 01:27:12,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f184bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:12, skipping insertion in model container [2021-11-07 01:27:12,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:12,880 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:27:12,883 INFO L168 Benchmark]: Toolchain (without parser) took 540.76 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 69.6 MB in the beginning and 105.3 MB in the end (delta: -35.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:27:12,884 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:27:12,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 534.45 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 69.3 MB in the beginning and 105.3 MB in the end (delta: -36.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:27:12,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 534.45 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 69.3 MB in the beginning and 105.3 MB in the end (delta: -36.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8 --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 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:27:15,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:27:15,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:27:15,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:27:15,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:27:15,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:27:15,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:27:15,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:27:15,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:27:15,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:27:15,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:27:15,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:27:15,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:27:15,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:27:15,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:27:15,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:27:15,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:27:15,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:27:15,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:27:15,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:27:15,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:27:15,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:27:15,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:27:15,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:27:15,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:27:15,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:27:15,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:27:15,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:27:15,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:27:15,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:27:15,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:27:15,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:27:15,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:27:15,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:27:15,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:27:15,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:27:15,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:27:15,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:27:15,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:27:15,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:27:15,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:27:15,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:27:15,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:27:15,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:27:15,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:27:15,432 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:27:15,432 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:27:15,432 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:27:15,433 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:27:15,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:27:15,433 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:27:15,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:27:15,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:27:15,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:27:15,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:27:15,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:27:15,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:27:15,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:27:15,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:27:15,437 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:27:15,437 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:27:15,437 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:27:15,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:27:15,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:27:15,438 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:27:15,438 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:27:15,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:27:15,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:27:15,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:27:15,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:27:15,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:27:15,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:15,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:27:15,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:27:15,440 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:27:15,440 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:15,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:27:15,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:27:15,441 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_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4318218de1a670b98e217596890d501e5109c78977de7e98dfa51804dcb18c15 [2021-11-07 01:27:15,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:27:15,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:27:15,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:27:15,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:27:15,851 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:27:15,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-11-07 01:27:15,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/55e6f6a52/646c6b3c940c452fb0798fcb7dd7981b/FLAG82f8e2611 [2021-11-07 01:27:16,634 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:27:16,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/sv-benchmarks/c/ldv-memsafety/memleaks_test23_4.i [2021-11-07 01:27:16,660 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/55e6f6a52/646c6b3c940c452fb0798fcb7dd7981b/FLAG82f8e2611 [2021-11-07 01:27:16,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/data/55e6f6a52/646c6b3c940c452fb0798fcb7dd7981b [2021-11-07 01:27:16,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:27:16,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:27:16,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:16,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:27:16,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:27:16,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:16" (1/1) ... [2021-11-07 01:27:16,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e064040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:16, skipping insertion in model container [2021-11-07 01:27:16,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:16" (1/1) ... [2021-11-07 01:27:16,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:27:16,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:17,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:17,338 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:27:17,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:17,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:17,453 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:27:17,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:17,631 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:27:17,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17 WrapperNode [2021-11-07 01:27:17,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:17,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:17,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:27:17,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:27:17,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:17,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:27:17,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:27:17,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:27:17,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:27:17,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:27:17,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:27:17,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:27:17,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (1/1) ... [2021-11-07 01:27:17,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:17,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:27:17,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:27:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:27:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:27:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:27:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:27:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:27:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:27:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:27:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:27:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:27:17,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:27:19,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:27:19,319 INFO L299 CfgBuilder]: Removed 53 assume(true) statements. [2021-11-07 01:27:19,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:19 BoogieIcfgContainer [2021-11-07 01:27:19,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:27:19,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:27:19,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:27:19,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:27:19,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:16" (1/3) ... [2021-11-07 01:27:19,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff7aae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:19, skipping insertion in model container [2021-11-07 01:27:19,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:17" (2/3) ... [2021-11-07 01:27:19,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff7aae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:19, skipping insertion in model container [2021-11-07 01:27:19,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:19" (3/3) ... [2021-11-07 01:27:19,329 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test23_4.i [2021-11-07 01:27:19,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:27:19,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 93 error locations. [2021-11-07 01:27:19,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:27:19,380 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 [2021-11-07 01:27:19,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 93 error locations. [2021-11-07 01:27:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 113 states have (on average 1.9646017699115044) internal successors, (222), 206 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:27:19,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:19,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:27:19,414 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 889508777, now seen corresponding path program 1 times [2021-11-07 01:27:19,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:19,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882163998] [2021-11-07 01:27:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:19,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:19,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:19,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:27:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:19,669 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 [2021-11-07 01:27:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:19,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:19,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:19,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882163998] [2021-11-07 01:27:19,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882163998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:19,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:27:19,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741725246] [2021-11-07 01:27:19,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:19,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:19,853 INFO L87 Difference]: Start difference. First operand has 207 states, 113 states have (on average 1.9646017699115044) internal successors, (222), 206 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:20,977 INFO L93 Difference]: Finished difference Result 418 states and 441 transitions. [2021-11-07 01:27:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 01:27:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:21,003 INFO L225 Difference]: With dead ends: 418 [2021-11-07 01:27:21,004 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 01:27:21,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:27:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 01:27:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 207. [2021-11-07 01:27:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 206 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2021-11-07 01:27:21,083 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 6 [2021-11-07 01:27:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:21,084 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2021-11-07 01:27:21,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2021-11-07 01:27:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:27:21,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:21,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:27:21,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:21,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:21,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 889508778, now seen corresponding path program 1 times [2021-11-07 01:27:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:21,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499761328] [2021-11-07 01:27:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:21,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:21,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:21,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:27:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:27:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:21,404 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 [2021-11-07 01:27:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:21,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:21,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:21,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499761328] [2021-11-07 01:27:21,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499761328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:21,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:21,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:27:21,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236036016] [2021-11-07 01:27:21,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:27:21,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:27:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:21,729 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 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) [2021-11-07 01:27:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:24,311 INFO L93 Difference]: Finished difference Result 429 states and 452 transitions. [2021-11-07 01:27:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:27:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 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 6 [2021-11-07 01:27:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:24,316 INFO L225 Difference]: With dead ends: 429 [2021-11-07 01:27:24,317 INFO L226 Difference]: Without dead ends: 429 [2021-11-07 01:27:24,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:27:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-07 01:27:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 208. [2021-11-07 01:27:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.9051724137931034) internal successors, (221), 207 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 221 transitions. [2021-11-07 01:27:24,332 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 221 transitions. Word has length 6 [2021-11-07 01:27:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:24,332 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 221 transitions. [2021-11-07 01:27:24,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 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) [2021-11-07 01:27:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 221 transitions. [2021-11-07 01:27:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:27:24,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:24,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:27:24,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:27:24,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:24,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash 889568359, now seen corresponding path program 1 times [2021-11-07 01:27:24,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:24,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911783910] [2021-11-07 01:27:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:24,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:24,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:24,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:27:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:24,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:24,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:24,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911783910] [2021-11-07 01:27:24,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911783910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:24,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:24,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:27:24,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980776408] [2021-11-07 01:27:24,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:24,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:24,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:24,719 INFO L87 Difference]: Start difference. First operand 208 states and 221 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:24,773 INFO L93 Difference]: Finished difference Result 307 states and 321 transitions. [2021-11-07 01:27:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 01:27:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:24,776 INFO L225 Difference]: With dead ends: 307 [2021-11-07 01:27:24,776 INFO L226 Difference]: Without dead ends: 307 [2021-11-07 01:27:24,777 INFO L786 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 [2021-11-07 01:27:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-07 01:27:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 203. [2021-11-07 01:27:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 114 states have (on average 1.8859649122807018) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 215 transitions. [2021-11-07 01:27:24,788 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 215 transitions. Word has length 6 [2021-11-07 01:27:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:24,789 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 215 transitions. [2021-11-07 01:27:24,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 215 transitions. [2021-11-07 01:27:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:27:24,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:24,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:24,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:25,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:25,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 119596323, now seen corresponding path program 1 times [2021-11-07 01:27:25,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:25,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038869223] [2021-11-07 01:27:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:25,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:25,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:25,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:25,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:27:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:27:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:25,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:25,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:25,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038869223] [2021-11-07 01:27:25,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038869223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:25,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:25,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:27:25,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947785101] [2021-11-07 01:27:25,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:25,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:25,164 INFO L87 Difference]: Start difference. First operand 203 states and 215 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-07 01:27:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:25,202 INFO L93 Difference]: Finished difference Result 255 states and 267 transitions. [2021-11-07 01:27:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-11-07 01:27:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:25,204 INFO L225 Difference]: With dead ends: 255 [2021-11-07 01:27:25,204 INFO L226 Difference]: Without dead ends: 255 [2021-11-07 01:27:25,205 INFO L786 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 [2021-11-07 01:27:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-07 01:27:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 203. [2021-11-07 01:27:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 114 states have (on average 1.8771929824561404) internal successors, (214), 202 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 214 transitions. [2021-11-07 01:27:25,213 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 214 transitions. Word has length 8 [2021-11-07 01:27:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:25,213 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 214 transitions. [2021-11-07 01:27:25,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-07 01:27:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 214 transitions. [2021-11-07 01:27:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:27:25,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:25,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:25,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:25,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:25,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 119442413, now seen corresponding path program 1 times [2021-11-07 01:27:25,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:25,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273735558] [2021-11-07 01:27:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:25,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:25,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:25,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:27:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:27:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:25,572 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:27:25,572 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 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-07 01:27:25,688 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:27:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-07 01:27:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:25,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:30,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:30,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273735558] [2021-11-07 01:27:30,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273735558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:30,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:30,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:27:30,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786150219] [2021-11-07 01:27:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:27:30,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:27:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-07 01:27:30,068 INFO L87 Difference]: Start difference. First operand 203 states and 214 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-07 01:27:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:30,770 INFO L93 Difference]: Finished difference Result 277 states and 290 transitions. [2021-11-07 01:27:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 8 [2021-11-07 01:27:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:30,773 INFO L225 Difference]: With dead ends: 277 [2021-11-07 01:27:30,773 INFO L226 Difference]: Without dead ends: 277 [2021-11-07 01:27:30,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=29, Invalid=41, Unknown=2, NotChecked=0, Total=72 [2021-11-07 01:27:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-07 01:27:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 202. [2021-11-07 01:27:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 114 states have (on average 1.868421052631579) internal successors, (213), 201 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 213 transitions. [2021-11-07 01:27:30,781 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 213 transitions. Word has length 8 [2021-11-07 01:27:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:30,781 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 213 transitions. [2021-11-07 01:27:30,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-07 01:27:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 213 transitions. [2021-11-07 01:27:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:27:30,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:30,783 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:30,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:30,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:30,995 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 119442414, now seen corresponding path program 1 times [2021-11-07 01:27:30,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:30,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744558863] [2021-11-07 01:27:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:30,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:30,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:31,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:27:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:27:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:31,143 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:27:31,144 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-07 01:27:31,191 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:27:31,191 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 2 case distinctions, treesize of input 23 treesize of output 36 [2021-11-07 01:27:31,477 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 01:27:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-07 01:27:31,535 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-11-07 01:27:31,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 49 treesize of output 71 [2021-11-07 01:27:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:31,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:32,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:32,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744558863] [2021-11-07 01:27:32,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744558863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:32,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:32,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 01:27:32,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418407297] [2021-11-07 01:27:32,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:27:32,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:27:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:32,076 INFO L87 Difference]: Start difference. First operand 202 states and 213 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-11-07 01:27:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:33,131 INFO L93 Difference]: Finished difference Result 276 states and 289 transitions. [2021-11-07 01:27:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 8 [2021-11-07 01:27:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:33,133 INFO L225 Difference]: With dead ends: 276 [2021-11-07 01:27:33,133 INFO L226 Difference]: Without dead ends: 276 [2021-11-07 01:27:33,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-07 01:27:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2021-11-07 01:27:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 114 states have (on average 1.8596491228070176) internal successors, (212), 200 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 212 transitions. [2021-11-07 01:27:33,140 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 212 transitions. Word has length 8 [2021-11-07 01:27:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:33,140 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 212 transitions. [2021-11-07 01:27:33,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-11-07 01:27:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 212 transitions. [2021-11-07 01:27:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:27:33,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:33,142 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:33,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:33,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:33,355 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash 176854625, now seen corresponding path program 1 times [2021-11-07 01:27:33,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:33,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578635189] [2021-11-07 01:27:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:33,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:33,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:33,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:33,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:27:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:33,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:33,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:33,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578635189] [2021-11-07 01:27:33,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578635189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:33,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:33,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:27:33,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756438854] [2021-11-07 01:27:33,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:27:33,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:27:33,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:33,558 INFO L87 Difference]: Start difference. First operand 201 states and 212 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:33,637 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2021-11-07 01:27:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:27:33,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2021-11-07 01:27:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:33,640 INFO L225 Difference]: With dead ends: 211 [2021-11-07 01:27:33,640 INFO L226 Difference]: Without dead ends: 211 [2021-11-07 01:27:33,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:27:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-07 01:27:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 203. [2021-11-07 01:27:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 116 states have (on average 1.8448275862068966) internal successors, (214), 202 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 214 transitions. [2021-11-07 01:27:33,645 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 214 transitions. Word has length 8 [2021-11-07 01:27:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:33,645 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 214 transitions. [2021-11-07 01:27:33,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 214 transitions. [2021-11-07 01:27:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:27:33,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:33,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:33,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:33,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:33,869 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr92ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash 176856706, now seen corresponding path program 1 times [2021-11-07 01:27:33,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:33,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007286222] [2021-11-07 01:27:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:33,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:33,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:33,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:33,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:27:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:33,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:33,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:34,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:34,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007286222] [2021-11-07 01:27:34,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007286222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:34,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:34,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:27:34,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749144480] [2021-11-07 01:27:34,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:34,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:34,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:34,020 INFO L87 Difference]: Start difference. First operand 203 states and 214 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) [2021-11-07 01:27:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:34,252 INFO L93 Difference]: Finished difference Result 206 states and 216 transitions. [2021-11-07 01:27:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:34,253 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 [2021-11-07 01:27:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:34,254 INFO L225 Difference]: With dead ends: 206 [2021-11-07 01:27:34,254 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 01:27:34,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 01:27:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-07 01:27:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 114 states have (on average 1.8508771929824561) internal successors, (211), 200 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2021-11-07 01:27:34,260 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 8 [2021-11-07 01:27:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:34,260 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2021-11-07 01:27:34,260 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) [2021-11-07 01:27:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2021-11-07 01:27:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:27:34,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:34,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:34,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:34,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2124084655, now seen corresponding path program 1 times [2021-11-07 01:27:34,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:34,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797338366] [2021-11-07 01:27:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:34,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:34,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:34,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:27:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:34,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:34,647 INFO L354 Elim1Store]: treesize reduction 13, result has 35.0 percent of original size [2021-11-07 01:27:34,648 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 1 case distinctions, treesize of input 9 treesize of output 13 [2021-11-07 01:27:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:34,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:34,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797338366] [2021-11-07 01:27:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797338366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:34,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:34,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:27:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491145378] [2021-11-07 01:27:34,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:34,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:34,741 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2021-11-07 01:27:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:35,260 INFO L93 Difference]: Finished difference Result 225 states and 236 transitions. [2021-11-07 01:27:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 [2021-11-07 01:27:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:35,262 INFO L225 Difference]: With dead ends: 225 [2021-11-07 01:27:35,262 INFO L226 Difference]: Without dead ends: 225 [2021-11-07 01:27:35,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-07 01:27:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 203. [2021-11-07 01:27:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 119 states have (on average 1.815126050420168) internal successors, (216), 202 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 216 transitions. [2021-11-07 01:27:35,268 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 216 transitions. Word has length 13 [2021-11-07 01:27:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:35,269 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 216 transitions. [2021-11-07 01:27:35,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2021-11-07 01:27:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 216 transitions. [2021-11-07 01:27:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:27:35,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:35,270 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:35,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:35,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:35,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2124084654, now seen corresponding path program 1 times [2021-11-07 01:27:35,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:35,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533403626] [2021-11-07 01:27:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:35,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:35,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:35,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:27:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:35,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:27:35,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:35,649 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:27:35,649 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 01:27:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:35,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:35,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533403626] [2021-11-07 01:27:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533403626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:35,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:35,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:27:35,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140251609] [2021-11-07 01:27:35,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:27:35,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:27:35,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:35,927 INFO L87 Difference]: Start difference. First operand 203 states and 216 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-11-07 01:27:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:36,572 INFO L93 Difference]: Finished difference Result 199 states and 211 transitions. [2021-11-07 01:27:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:36,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 13 [2021-11-07 01:27:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:36,574 INFO L225 Difference]: With dead ends: 199 [2021-11-07 01:27:36,574 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 01:27:36,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:27:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 01:27:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-07 01:27:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 119 states have (on average 1.773109243697479) internal successors, (211), 198 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 211 transitions. [2021-11-07 01:27:36,577 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 211 transitions. Word has length 13 [2021-11-07 01:27:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:36,577 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 211 transitions. [2021-11-07 01:27:36,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-11-07 01:27:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 211 transitions. [2021-11-07 01:27:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:27:36,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:36,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:36,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:36,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:36,797 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:36,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1135767445, now seen corresponding path program 1 times [2021-11-07 01:27:36,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:36,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923610369] [2021-11-07 01:27:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:36,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:36,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:36,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:36,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:27:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:36,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:37,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:37,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923610369] [2021-11-07 01:27:37,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923610369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:37,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:37,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:27:37,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239185033] [2021-11-07 01:27:37,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:37,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:37,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:37,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:37,028 INFO L87 Difference]: Start difference. First operand 199 states and 211 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-11-07 01:27:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:37,108 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2021-11-07 01:27:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2021-11-07 01:27:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:37,110 INFO L225 Difference]: With dead ends: 199 [2021-11-07 01:27:37,110 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 01:27:37,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 01:27:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-07 01:27:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 119 states have (on average 1.7647058823529411) internal successors, (210), 198 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 210 transitions. [2021-11-07 01:27:37,115 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 210 transitions. Word has length 15 [2021-11-07 01:27:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:37,115 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 210 transitions. [2021-11-07 01:27:37,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-11-07 01:27:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 210 transitions. [2021-11-07 01:27:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:27:37,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:37,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:37,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:37,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:37,317 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2116860357, now seen corresponding path program 1 times [2021-11-07 01:27:37,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:37,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897956464] [2021-11-07 01:27:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:37,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:37,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:37,319 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:37,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:27:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:37,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:37,588 INFO L354 Elim1Store]: treesize reduction 13, result has 35.0 percent of original size [2021-11-07 01:27:37,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-07 01:27:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:37,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:37,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:37,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897956464] [2021-11-07 01:27:37,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897956464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:37,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:37,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:27:37,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737943417] [2021-11-07 01:27:37,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:37,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:37,938 INFO L87 Difference]: Start difference. First operand 199 states and 210 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 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) [2021-11-07 01:27:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:38,334 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2021-11-07 01:27:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 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 21 [2021-11-07 01:27:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:38,335 INFO L225 Difference]: With dead ends: 217 [2021-11-07 01:27:38,335 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 01:27:38,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:27:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 01:27:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-11-07 01:27:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 119 states have (on average 1.73109243697479) internal successors, (206), 194 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 206 transitions. [2021-11-07 01:27:38,340 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 206 transitions. Word has length 21 [2021-11-07 01:27:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:38,341 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 206 transitions. [2021-11-07 01:27:38,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 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) [2021-11-07 01:27:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 206 transitions. [2021-11-07 01:27:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:27:38,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:38,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:38,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:27:38,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:38,554 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2116860356, now seen corresponding path program 1 times [2021-11-07 01:27:38,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:38,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946897340] [2021-11-07 01:27:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:38,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:38,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:38,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:38,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:27:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:27:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:38,814 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:27:38,815 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 1 case distinctions, treesize of input 20 treesize of output 21 [2021-11-07 01:27:38,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-07 01:27:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:38,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:39,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946897340] [2021-11-07 01:27:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946897340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:39,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:39,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:27:39,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933900873] [2021-11-07 01:27:39,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:39,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:39,223 INFO L87 Difference]: Start difference. First operand 195 states and 206 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 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) [2021-11-07 01:27:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:41,147 INFO L93 Difference]: Finished difference Result 598 states and 634 transitions. [2021-11-07 01:27:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:41,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 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 21 [2021-11-07 01:27:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:41,152 INFO L225 Difference]: With dead ends: 598 [2021-11-07 01:27:41,152 INFO L226 Difference]: Without dead ends: 598 [2021-11-07 01:27:41,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-07 01:27:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 254. [2021-11-07 01:27:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 178 states have (on average 1.7359550561797752) internal successors, (309), 253 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 309 transitions. [2021-11-07 01:27:41,162 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 309 transitions. Word has length 21 [2021-11-07 01:27:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:41,162 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 309 transitions. [2021-11-07 01:27:41,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 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) [2021-11-07 01:27:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 309 transitions. [2021-11-07 01:27:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:27:41,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:41,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:41,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:41,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:41,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1511652654, now seen corresponding path program 1 times [2021-11-07 01:27:41,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:41,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354892417] [2021-11-07 01:27:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:41,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:41,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:41,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:27:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:27:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:41,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:41,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:41,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354892417] [2021-11-07 01:27:41,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354892417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:41,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:41,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:27:41,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944487166] [2021-11-07 01:27:41,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:41,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:41,732 INFO L87 Difference]: Start difference. First operand 254 states and 309 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:41,756 INFO L93 Difference]: Finished difference Result 326 states and 383 transitions. [2021-11-07 01:27:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-11-07 01:27:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:41,762 INFO L225 Difference]: With dead ends: 326 [2021-11-07 01:27:41,762 INFO L226 Difference]: Without dead ends: 326 [2021-11-07 01:27:41,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-07 01:27:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 256. [2021-11-07 01:27:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 180 states have (on average 1.7277777777777779) internal successors, (311), 255 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2021-11-07 01:27:41,776 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 23 [2021-11-07 01:27:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:41,776 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2021-11-07 01:27:41,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2021-11-07 01:27:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:27:41,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:41,781 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:41,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:41,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:41,993 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:41,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash -383407644, now seen corresponding path program 1 times [2021-11-07 01:27:41,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:41,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410430219] [2021-11-07 01:27:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:41,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:41,998 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:41,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:27:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:42,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:42,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:42,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:42,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:42,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410430219] [2021-11-07 01:27:42,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410430219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:42,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:42,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 9 [2021-11-07 01:27:42,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450893100] [2021-11-07 01:27:42,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:27:42,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:27:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:42,832 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:43,096 INFO L93 Difference]: Finished difference Result 254 states and 308 transitions. [2021-11-07 01:27:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:27:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:27:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:43,098 INFO L225 Difference]: With dead ends: 254 [2021-11-07 01:27:43,098 INFO L226 Difference]: Without dead ends: 254 [2021-11-07 01:27:43,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:27:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-07 01:27:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-07 01:27:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 180 states have (on average 1.711111111111111) internal successors, (308), 253 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 308 transitions. [2021-11-07 01:27:43,106 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 308 transitions. Word has length 24 [2021-11-07 01:27:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:43,106 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 308 transitions. [2021-11-07 01:27:43,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 308 transitions. [2021-11-07 01:27:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:27:43,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:43,108 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:43,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:43,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,321 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash 688778022, now seen corresponding path program 1 times [2021-11-07 01:27:43,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:43,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998480758] [2021-11-07 01:27:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:43,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:43,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:43,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:27:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:27:43,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:43,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:43,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998480758] [2021-11-07 01:27:43,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998480758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:43,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:43,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:43,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186685623] [2021-11-07 01:27:43,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:43,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:43,785 INFO L87 Difference]: Start difference. First operand 254 states and 308 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:43,832 INFO L93 Difference]: Finished difference Result 310 states and 364 transitions. [2021-11-07 01:27:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 28 [2021-11-07 01:27:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:43,836 INFO L225 Difference]: With dead ends: 310 [2021-11-07 01:27:43,836 INFO L226 Difference]: Without dead ends: 310 [2021-11-07 01:27:43,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-07 01:27:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 256. [2021-11-07 01:27:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 182 states have (on average 1.7032967032967032) internal successors, (310), 255 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 310 transitions. [2021-11-07 01:27:43,844 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 310 transitions. Word has length 28 [2021-11-07 01:27:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:43,845 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 310 transitions. [2021-11-07 01:27:43,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 310 transitions. [2021-11-07 01:27:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:27:43,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:43,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:43,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:44,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:44,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:27:44,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:44,063 INFO L85 PathProgramCache]: Analyzing trace with hash 490789325, now seen corresponding path program 1 times [2021-11-07 01:27:44,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:44,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400570326] [2021-11-07 01:27:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:44,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:44,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:44,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:44,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:27:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:27:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:44,427 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 [2021-11-07 01:27:44,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:44,607 INFO L354 Elim1Store]: treesize reduction 27, result has 42.6 percent of original size [2021-11-07 01:27:44,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 35 [2021-11-07 01:27:45,498 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-07 01:27:45,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 58 [2021-11-07 01:27:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:45,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:52,781 INFO L354 Elim1Store]: treesize reduction -1, result has 104.0 percent of original size [2021-11-07 01:27:52,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 231 [2021-11-07 01:27:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:55,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:55,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400570326] [2021-11-07 01:27:55,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400570326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:55,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:55,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 20 [2021-11-07 01:27:55,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471119670] [2021-11-07 01:27:55,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 01:27:55,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 01:27:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=363, Unknown=4, NotChecked=0, Total=462 [2021-11-07 01:27:55,313 INFO L87 Difference]: Start difference. First operand 256 states and 310 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-11-07 01:28:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:15,158 INFO L93 Difference]: Finished difference Result 402 states and 460 transitions. [2021-11-07 01:28:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:28:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 30 [2021-11-07 01:28:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:15,161 INFO L225 Difference]: With dead ends: 402 [2021-11-07 01:28:15,161 INFO L226 Difference]: Without dead ends: 402 [2021-11-07 01:28:15,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=248, Invalid=740, Unknown=4, NotChecked=0, Total=992 [2021-11-07 01:28:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-07 01:28:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 264. [2021-11-07 01:28:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 190 states have (on average 1.7) internal successors, (323), 263 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 323 transitions. [2021-11-07 01:28:15,171 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 323 transitions. Word has length 30 [2021-11-07 01:28:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 323 transitions. [2021-11-07 01:28:15,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-11-07 01:28:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 323 transitions. [2021-11-07 01:28:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:28:15,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:15,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:15,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:15,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:15,392 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr69REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:28:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash 490789326, now seen corresponding path program 1 times [2021-11-07 01:28:15,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:15,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110677508] [2021-11-07 01:28:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:15,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:15,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:15,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:28:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:28:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:15,858 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:28:15,859 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-07 01:28:15,900 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:28:15,901 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 2 case distinctions, treesize of input 23 treesize of output 36 [2021-11-07 01:28:16,120 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 01:28:16,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2021-11-07 01:28:16,160 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-11-07 01:28:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 69 [2021-11-07 01:28:16,893 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-07 01:28:16,894 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 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:28:16,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:28:16,907 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 37 treesize of output 37 [2021-11-07 01:28:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:18,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:21,349 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:28:21,349 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 36 treesize of output 35 [2021-11-07 01:28:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:35,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110677508] [2021-11-07 01:28:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110677508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:35,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:35,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 14 [2021-11-07 01:28:35,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358277078] [2021-11-07 01:28:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:28:35,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:28:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=168, Unknown=7, NotChecked=0, Total=240 [2021-11-07 01:28:35,022 INFO L87 Difference]: Start difference. First operand 264 states and 323 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 15 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) [2021-11-07 01:28:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:37,686 INFO L93 Difference]: Finished difference Result 284 states and 340 transitions. [2021-11-07 01:28:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:28:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 15 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 30 [2021-11-07 01:28:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:37,689 INFO L225 Difference]: With dead ends: 284 [2021-11-07 01:28:37,690 INFO L226 Difference]: Without dead ends: 284 [2021-11-07 01:28:37,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=142, Invalid=313, Unknown=7, NotChecked=0, Total=462 [2021-11-07 01:28:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-07 01:28:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2021-11-07 01:28:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 190 states have (on average 1.6789473684210525) internal successors, (319), 261 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 319 transitions. [2021-11-07 01:28:37,698 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 319 transitions. Word has length 30 [2021-11-07 01:28:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:37,698 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 319 transitions. [2021-11-07 01:28:37,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 15 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) [2021-11-07 01:28:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 319 transitions. [2021-11-07 01:28:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:28:37,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:37,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:37,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:37,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:37,927 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr92ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:28:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash 490791406, now seen corresponding path program 1 times [2021-11-07 01:28:37,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:37,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015555162] [2021-11-07 01:28:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:37,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:37,928 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:37,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:28:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:28:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:38,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:38,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:38,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015555162] [2021-11-07 01:28:38,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015555162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:38,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:38,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:28:38,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803189505] [2021-11-07 01:28:38,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:38,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:38,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:38,405 INFO L87 Difference]: Start difference. First operand 262 states and 319 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:38,428 INFO L93 Difference]: Finished difference Result 264 states and 318 transitions. [2021-11-07 01:28:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:28:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-11-07 01:28:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:38,430 INFO L225 Difference]: With dead ends: 264 [2021-11-07 01:28:38,430 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 01:28:38,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:28:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 01:28:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-11-07 01:28:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 190 states have (on average 1.668421052631579) internal successors, (317), 261 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 317 transitions. [2021-11-07 01:28:38,436 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 317 transitions. Word has length 30 [2021-11-07 01:28:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:38,436 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 317 transitions. [2021-11-07 01:28:38,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 317 transitions. [2021-11-07 01:28:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:28:38,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:38,439 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:38,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:28:38,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:38,651 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:28:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -507245845, now seen corresponding path program 1 times [2021-11-07 01:28:38,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:38,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470916638] [2021-11-07 01:28:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:38,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:38,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:38,653 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:38,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:28:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:39,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:28:39,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:39,126 INFO L354 Elim1Store]: treesize reduction 13, result has 35.0 percent of original size [2021-11-07 01:28:39,126 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 1 case distinctions, treesize of input 9 treesize of output 13 [2021-11-07 01:28:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:39,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:39,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470916638] [2021-11-07 01:28:39,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470916638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:39,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:39,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:28:39,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345807546] [2021-11-07 01:28:39,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:28:39,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:28:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:28:39,377 INFO L87 Difference]: Start difference. First operand 262 states and 317 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:40,088 INFO L93 Difference]: Finished difference Result 296 states and 349 transitions. [2021-11-07 01:28:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:28:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-11-07 01:28:40,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:40,090 INFO L225 Difference]: With dead ends: 296 [2021-11-07 01:28:40,090 INFO L226 Difference]: Without dead ends: 296 [2021-11-07 01:28:40,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-07 01:28:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 260. [2021-11-07 01:28:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 190 states have (on average 1.6368421052631579) internal successors, (311), 259 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 311 transitions. [2021-11-07 01:28:40,097 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 311 transitions. Word has length 30 [2021-11-07 01:28:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:40,097 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 311 transitions. [2021-11-07 01:28:40,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 311 transitions. [2021-11-07 01:28:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:28:40,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:40,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:40,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:28:40,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:40,311 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:28:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:40,311 INFO L85 PathProgramCache]: Analyzing trace with hash -507245844, now seen corresponding path program 1 times [2021-11-07 01:28:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:40,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518899286] [2021-11-07 01:28:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:40,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:40,313 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:40,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:28:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:28:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:40,835 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:28:40,836 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 01:28:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:41,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:41,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:41,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518899286] [2021-11-07 01:28:41,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518899286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:41,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:28:41,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722215557] [2021-11-07 01:28:41,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:28:41,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:28:41,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:41,569 INFO L87 Difference]: Start difference. First operand 260 states and 311 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 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) [2021-11-07 01:28:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:42,742 INFO L93 Difference]: Finished difference Result 328 states and 378 transitions. [2021-11-07 01:28:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:28:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 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 30 [2021-11-07 01:28:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:42,754 INFO L225 Difference]: With dead ends: 328 [2021-11-07 01:28:42,754 INFO L226 Difference]: Without dead ends: 328 [2021-11-07 01:28:42,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:28:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-07 01:28:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 258. [2021-11-07 01:28:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 190 states have (on average 1.605263157894737) internal successors, (305), 257 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 305 transitions. [2021-11-07 01:28:42,763 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 305 transitions. Word has length 30 [2021-11-07 01:28:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:42,763 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 305 transitions. [2021-11-07 01:28:42,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 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) [2021-11-07 01:28:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 305 transitions. [2021-11-07 01:28:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:28:42,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:42,765 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:42,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:42,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:42,981 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 89 more)] === [2021-11-07 01:28:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:42,981 INFO L85 PathProgramCache]: Analyzing trace with hash -797854609, now seen corresponding path program 1 times [2021-11-07 01:28:42,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:42,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033362069] [2021-11-07 01:28:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:42,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:42,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:42,983 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:42,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556a12ee-f646-4e68-b959-28e1a02ac9a0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:28:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 01:28:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:43,601 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 [2021-11-07 01:28:43,625 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 [2021-11-07 01:28:43,911 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 11 treesize of output 7 [2021-11-07 01:28:43,921 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 26 treesize of output 22 [2021-11-07 01:28:44,051 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 01:28:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2021-11-07 01:28:44,075 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-07 01:28:44,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 44 [2021-11-07 01:28:44,704 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 01:28:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-11-07 01:28:44,813 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 01:28:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-07 01:28:45,399 INFO L354 Elim1Store]: treesize reduction 152, result has 4.4 percent of original size [2021-11-07 01:28:45,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 75 [2021-11-07 01:28:45,521 INFO L354 Elim1Store]: treesize reduction 152, result has 4.4 percent of original size [2021-11-07 01:28:45,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 43 [2021-11-07 01:28:47,545 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 54 treesize of output 46 [2021-11-07 01:28:47,550 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 43 treesize of output 31 [2021-11-07 01:28:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:48,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:48,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:48,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-07 01:28:48,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:48,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 312 [2021-11-07 01:29:53,884 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 1164382 treesize of output 1163358 [2021-11-07 01:29:55,988 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 33353311221 treesize of output 33286201333