./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan --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 5a406420701ce6274f0517b83ae1d565a6306d39 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan --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 5a406420701ce6274f0517b83ae1d565a6306d39 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:24:36,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:24:36,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:24:36,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:24:36,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:24:36,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:24:36,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:24:36,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:24:36,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:24:36,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:24:36,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:24:36,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:24:36,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:24:36,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:24:36,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:24:36,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:24:36,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:24:36,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:24:36,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:24:36,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:24:36,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:24:36,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:24:36,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:24:36,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:24:36,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:24:36,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:24:36,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:24:36,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:24:36,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:24:36,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:24:36,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:24:36,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:24:36,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:24:36,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:24:36,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:24:36,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:24:36,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:24:36,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:24:36,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:24:36,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:24:36,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:24:36,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 16:24:36,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:24:36,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:24:36,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:24:36,289 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:24:36,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:24:36,289 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:24:36,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:24:36,290 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:24:36,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:24:36,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:24:36,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:24:36,290 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:24:36,290 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:24:36,296 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:24:36,296 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:24:36,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 16:24:36,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 16:24:36,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:24:36,298 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:24:36,298 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:24:36,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:24:36,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:24:36,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:24:36,298 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 16:24:36,299 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 16:24:36,299 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 16:24:36,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:24:36,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:24:36,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:24:36,299 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:24:36,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:24:36,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:24:36,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:24:36,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:24:36,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:24:36,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:24:36,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:24:36,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:24:36,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:24:36,301 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-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a406420701ce6274f0517b83ae1d565a6306d39 [2020-12-09 16:24:36,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:24:36,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:24:36,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:24:36,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:24:36,504 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:24:36,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2020-12-09 16:24:36,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/fea3e0bee/5369b94e3cad4770b571260f52b0c363/FLAG46a326ab2 [2020-12-09 16:24:36,985 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:24:36,985 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2020-12-09 16:24:36,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/fea3e0bee/5369b94e3cad4770b571260f52b0c363/FLAG46a326ab2 [2020-12-09 16:24:37,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/fea3e0bee/5369b94e3cad4770b571260f52b0c363 [2020-12-09 16:24:37,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:24:37,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:24:37,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:24:37,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:24:37,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:24:37,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:24:37" (1/1) ... [2020-12-09 16:24:37,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6584b1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:37, skipping insertion in model container [2020-12-09 16:24:37,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:24:37" (1/1) ... [2020-12-09 16:24:37,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:24:37,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:24:37,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:24:37,336 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) [2020-12-09 16:24:37,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@521d8722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:37, skipping insertion in model container [2020-12-09 16:24:37,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:24:37,337 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-12-09 16:24:37,339 INFO L168 Benchmark]: Toolchain (without parser) took 329.23 ms. Allocated memory is still 117.4 MB. Free memory was 95.0 MB in the beginning and 81.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:24:37,339 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:24:37,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.15 ms. Allocated memory is still 117.4 MB. Free memory was 95.0 MB in the beginning and 81.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:24:37,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.15 ms. Allocated memory is still 117.4 MB. Free memory was 95.0 MB in the beginning and 81.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 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... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:24:38,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:24:38,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:24:38,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:24:38,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:24:38,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:24:38,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:24:38,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:24:38,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:24:38,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:24:38,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:24:38,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:24:38,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:24:38,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:24:38,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:24:38,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:24:38,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:24:38,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:24:38,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:24:38,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:24:38,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:24:38,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:24:38,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:24:38,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:24:38,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:24:38,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:24:38,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:24:38,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:24:38,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:24:38,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:24:38,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:24:38,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:24:38,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:24:38,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:24:38,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:24:38,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:24:38,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:24:38,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:24:38,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:24:38,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:24:38,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:24:38,710 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 16:24:38,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:24:38,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:24:38,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:24:38,733 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:24:38,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:24:38,734 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:24:38,734 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:24:38,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:24:38,734 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:24:38,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 16:24:38,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 16:24:38,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:24:38,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:24:38,736 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:24:38,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:24:38,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:24:38,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:24:38,737 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 16:24:38,737 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 16:24:38,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 16:24:38,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:24:38,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:24:38,738 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 16:24:38,738 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 16:24:38,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:24:38,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:24:38,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:24:38,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 16:24:38,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:24:38,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:24:38,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:24:38,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:24:38,739 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 16:24:38,740 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 16:24:38,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:24:38,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:24:38,740 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-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a406420701ce6274f0517b83ae1d565a6306d39 [2020-12-09 16:24:38,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:24:38,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:24:38,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:24:38,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:24:38,991 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:24:38,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2020-12-09 16:24:39,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/32d9c1f7e/fcc8b16525fc46699d3d214b59744e65/FLAGc10c54c91 [2020-12-09 16:24:39,472 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:24:39,473 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2020-12-09 16:24:39,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/32d9c1f7e/fcc8b16525fc46699d3d214b59744e65/FLAGc10c54c91 [2020-12-09 16:24:39,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/data/32d9c1f7e/fcc8b16525fc46699d3d214b59744e65 [2020-12-09 16:24:39,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:24:39,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:24:39,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:24:39,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:24:39,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:24:39,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:39,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af20e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39, skipping insertion in model container [2020-12-09 16:24:39,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:39,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:24:39,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:24:39,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:24:39,802 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-12-09 16:24:39,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:24:39,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:24:39,854 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:24:39,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:24:39,958 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:24:39,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39 WrapperNode [2020-12-09 16:24:39,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:24:39,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:24:39,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:24:39,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:24:39,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:39,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:39,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:24:39,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:24:39,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:24:39,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:24:40,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... [2020-12-09 16:24:40,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:24:40,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:24:40,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:24:40,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:24:40,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:24:40,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 16:24:40,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 16:24:40,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:24:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 16:24:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 16:24:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:24:40,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:24:40,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:24:40,485 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-09 16:24:40,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:24:40 BoogieIcfgContainer [2020-12-09 16:24:40,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:24:40,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:24:40,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:24:40,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:24:40,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:24:39" (1/3) ... [2020-12-09 16:24:40,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebc28ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:24:40, skipping insertion in model container [2020-12-09 16:24:40,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:24:39" (2/3) ... [2020-12-09 16:24:40,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebc28ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:24:40, skipping insertion in model container [2020-12-09 16:24:40,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:24:40" (3/3) ... [2020-12-09 16:24:40,494 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test13_2.i [2020-12-09 16:24:40,506 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:24:40,509 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 29 error locations. [2020-12-09 16:24:40,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2020-12-09 16:24:40,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:24:40,534 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 16:24:40,534 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:24:40,534 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:24:40,534 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:24:40,534 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:24:40,534 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:24:40,534 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:24:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-09 16:24:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:24:40,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:40,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:24:40,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-12-09 16:24:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:40,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036968947] [2020-12-09 16:24:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:24:40,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:40,784 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:24:40,785 INFO L382 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 33 [2020-12-09 16:24:40,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:40,826 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-12-09 16:24:40,835 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:40,839 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:40,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:25 [2020-12-09 16:24:40,842 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:40,906 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:40,907 INFO L382 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 17 treesize of output 39 [2020-12-09 16:24:40,913 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:40,923 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:40,930 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:40,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:17 [2020-12-09 16:24:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:40,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:40,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036968947] [2020-12-09 16:24:40,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:40,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:24:40,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892097926] [2020-12-09 16:24:40,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:24:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:41,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:24:41,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:41,011 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 5 states. [2020-12-09 16:24:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:41,297 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-09 16:24:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:41,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 16:24:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:41,305 INFO L225 Difference]: With dead ends: 99 [2020-12-09 16:24:41,305 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 16:24:41,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:24:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 16:24:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 58. [2020-12-09 16:24:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 16:24:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-09 16:24:41,329 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 6 [2020-12-09 16:24:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:41,329 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-09 16:24:41,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:24:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-09 16:24:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:24:41,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:41,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:24:41,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 16:24:41,532 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 889508714, now seen corresponding path program 1 times [2020-12-09 16:24:41,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:41,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354279059] [2020-12-09 16:24:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 16:24:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:41,824 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:24:41,825 INFO L382 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 33 [2020-12-09 16:24:41,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:41,877 INFO L625 ElimStorePlain]: treesize reduction 12, result has 75.5 percent of original size [2020-12-09 16:24:41,891 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 16:24:41,891 INFO L382 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 11 [2020-12-09 16:24:41,892 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:41,907 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:41,909 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:41,910 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:41,910 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:38 [2020-12-09 16:24:41,912 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:41,932 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:41,966 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:41,970 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 16:24:41,973 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-12-09 16:24:42,064 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:42,065 INFO L382 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 21 treesize of output 61 [2020-12-09 16:24:42,068 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:42,096 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:42,096 INFO L382 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 18 treesize of output 36 [2020-12-09 16:24:42,098 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:42,103 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 16:24:42,110 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:42,110 INFO L382 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2020-12-09 16:24:42,112 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:42,209 INFO L625 ElimStorePlain]: treesize reduction 8, result has 89.0 percent of original size [2020-12-09 16:24:42,230 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:42,231 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 34 [2020-12-09 16:24:42,233 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:42,251 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:42,251 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 34 [2020-12-09 16:24:42,253 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:42,335 INFO L625 ElimStorePlain]: treesize reduction 12, result has 82.1 percent of original size [2020-12-09 16:24:42,340 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-12-09 16:24:42,340 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:128, output treesize:31 [2020-12-09 16:24:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:42,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:42,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354279059] [2020-12-09 16:24:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:24:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842048596] [2020-12-09 16:24:42,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:24:42,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:24:42,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:42,389 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2020-12-09 16:24:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:42,705 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-09 16:24:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:42,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 16:24:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:42,707 INFO L225 Difference]: With dead ends: 92 [2020-12-09 16:24:42,707 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 16:24:42,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:24:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 16:24:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2020-12-09 16:24:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 16:24:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-09 16:24:42,712 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 6 [2020-12-09 16:24:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:42,712 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-09 16:24:42,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:24:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-09 16:24:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:24:42,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:42,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:42,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 16:24:42,915 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash 119380842, now seen corresponding path program 1 times [2020-12-09 16:24:42,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:42,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330354360] [2020-12-09 16:24:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 16:24:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:43,009 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:43,011 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:43,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:43,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:43,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-12-09 16:24:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:43,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:43,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330354360] [2020-12-09 16:24:43,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:43,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:24:43,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280849098] [2020-12-09 16:24:43,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:24:43,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:24:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:24:43,035 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 6 states. [2020-12-09 16:24:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:43,375 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-09 16:24:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 16:24:43,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-09 16:24:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:43,376 INFO L225 Difference]: With dead ends: 111 [2020-12-09 16:24:43,377 INFO L226 Difference]: Without dead ends: 111 [2020-12-09 16:24:43,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-09 16:24:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-09 16:24:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2020-12-09 16:24:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 16:24:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-12-09 16:24:43,381 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 8 [2020-12-09 16:24:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:43,381 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-12-09 16:24:43,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:24:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-12-09 16:24:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:24:43,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:43,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:43,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 16:24:43,584 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:43,586 INFO L82 PathProgramCache]: Analyzing trace with hash 119380843, now seen corresponding path program 1 times [2020-12-09 16:24:43,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:43,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469202648] [2020-12-09 16:24:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 16:24:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:43,706 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:24:43,706 INFO L382 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 33 [2020-12-09 16:24:43,708 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:43,746 INFO L625 ElimStorePlain]: treesize reduction 12, result has 81.0 percent of original size [2020-12-09 16:24:43,758 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 16:24:43,758 INFO L382 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 11 [2020-12-09 16:24:43,759 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:43,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:43,778 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:43,779 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:43,779 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:52 [2020-12-09 16:24:43,780 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:43,802 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:43,820 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:24:43,822 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 16:24:43,823 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-12-09 16:24:43,893 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:43,893 INFO L382 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 21 treesize of output 61 [2020-12-09 16:24:43,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:43,922 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:43,922 INFO L382 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 16 treesize of output 34 [2020-12-09 16:24:43,924 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:43,929 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 16:24:43,934 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:43,934 INFO L382 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2020-12-09 16:24:43,935 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:44,051 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-09 16:24:44,051 INFO L625 ElimStorePlain]: treesize reduction 8, result has 91.9 percent of original size [2020-12-09 16:24:44,076 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:44,077 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 32 [2020-12-09 16:24:44,078 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:44,092 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:44,093 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 34 [2020-12-09 16:24:44,094 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:44,188 INFO L625 ElimStorePlain]: treesize reduction 12, result has 87.9 percent of original size [2020-12-09 16:24:44,192 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-12-09 16:24:44,192 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:164, output treesize:59 [2020-12-09 16:24:44,246 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:44,247 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:44,255 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:44,257 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:44,258 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:44,263 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:44,264 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:44,264 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:9 [2020-12-09 16:24:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:44,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:44,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469202648] [2020-12-09 16:24:44,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:44,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 16:24:44,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918878609] [2020-12-09 16:24:44,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 16:24:44,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:44,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 16:24:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:24:44,291 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 7 states. [2020-12-09 16:24:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:44,830 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-12-09 16:24:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 16:24:44,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-12-09 16:24:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:44,832 INFO L225 Difference]: With dead ends: 108 [2020-12-09 16:24:44,832 INFO L226 Difference]: Without dead ends: 108 [2020-12-09 16:24:44,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-09 16:24:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-09 16:24:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 54. [2020-12-09 16:24:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 16:24:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-09 16:24:44,838 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 8 [2020-12-09 16:24:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:44,838 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-09 16:24:44,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 16:24:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-09 16:24:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:24:44,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:44,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:45,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 16:24:45,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash -574091939, now seen corresponding path program 1 times [2020-12-09 16:24:45,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:45,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834132979] [2020-12-09 16:24:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:45,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:24:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:45,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834132979] [2020-12-09 16:24:45,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:45,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:24:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326716530] [2020-12-09 16:24:45,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:24:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:24:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:24:45,130 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 4 states. [2020-12-09 16:24:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:45,146 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-12-09 16:24:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:45,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 16:24:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:45,148 INFO L225 Difference]: With dead ends: 105 [2020-12-09 16:24:45,148 INFO L226 Difference]: Without dead ends: 105 [2020-12-09 16:24:45,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-09 16:24:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 56. [2020-12-09 16:24:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 16:24:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-09 16:24:45,153 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 9 [2020-12-09 16:24:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:45,153 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-09 16:24:45,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:24:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-09 16:24:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:24:45,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:45,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:45,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 16:24:45,355 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash -594161204, now seen corresponding path program 1 times [2020-12-09 16:24:45,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:45,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417773068] [2020-12-09 16:24:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 16:24:45,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:45,529 INFO L382 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 [2020-12-09 16:24:45,530 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:45,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:45,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:45,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 16:24:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:45,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:45,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417773068] [2020-12-09 16:24:45,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:45,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 16:24:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258402553] [2020-12-09 16:24:45,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:24:45,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:24:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:24:45,552 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 6 states. [2020-12-09 16:24:45,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:45,936 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-09 16:24:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 16:24:45,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 16:24:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:45,938 INFO L225 Difference]: With dead ends: 138 [2020-12-09 16:24:45,938 INFO L226 Difference]: Without dead ends: 138 [2020-12-09 16:24:45,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 16:24:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-09 16:24:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 59. [2020-12-09 16:24:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 16:24:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-09 16:24:45,942 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2020-12-09 16:24:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:45,942 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-09 16:24:45,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:24:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-09 16:24:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:24:45,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:45,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:46,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 16:24:46,145 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash -594161203, now seen corresponding path program 1 times [2020-12-09 16:24:46,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:46,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213613383] [2020-12-09 16:24:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 16:24:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:46,266 INFO L382 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 [2020-12-09 16:24:46,266 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:46,270 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:46,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:46,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 16:24:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:46,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:46,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213613383] [2020-12-09 16:24:46,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:46,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 16:24:46,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389274165] [2020-12-09 16:24:46,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 16:24:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 16:24:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:24:46,312 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 7 states. [2020-12-09 16:24:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:46,690 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-09 16:24:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 16:24:46,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-09 16:24:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:46,691 INFO L225 Difference]: With dead ends: 100 [2020-12-09 16:24:46,691 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 16:24:46,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-09 16:24:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 16:24:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 60. [2020-12-09 16:24:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 16:24:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-09 16:24:46,695 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 9 [2020-12-09 16:24:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:46,695 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-09 16:24:46,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 16:24:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-09 16:24:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:24:46,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:46,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:46,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 16:24:46,897 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1200915423, now seen corresponding path program 1 times [2020-12-09 16:24:46,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:46,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674363494] [2020-12-09 16:24:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:24:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:47,012 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:24:47,013 INFO L382 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 33 [2020-12-09 16:24:47,014 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,049 INFO L625 ElimStorePlain]: treesize reduction 12, result has 72.7 percent of original size [2020-12-09 16:24:47,050 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:47,051 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:47,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:32 [2020-12-09 16:24:47,053 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:47,083 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:47,084 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:47,088 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-12-09 16:24:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:47,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674363494] [2020-12-09 16:24:47,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:47,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:24:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129083565] [2020-12-09 16:24:47,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:24:47,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:24:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:47,100 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 5 states. [2020-12-09 16:24:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:47,345 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-09 16:24:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:24:47,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 16:24:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:47,346 INFO L225 Difference]: With dead ends: 111 [2020-12-09 16:24:47,346 INFO L226 Difference]: Without dead ends: 111 [2020-12-09 16:24:47,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:24:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-09 16:24:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2020-12-09 16:24:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 16:24:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-12-09 16:24:47,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 9 [2020-12-09 16:24:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:47,351 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-12-09 16:24:47,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:24:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-12-09 16:24:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:24:47,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:47,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:47,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 16:24:47,554 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1200915424, now seen corresponding path program 1 times [2020-12-09 16:24:47,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:47,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623557757] [2020-12-09 16:24:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 16:24:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:47,773 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 16:24:47,773 INFO L382 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 11 [2020-12-09 16:24:47,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,792 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:47,793 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:47,793 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:28 [2020-12-09 16:24:47,844 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:47,846 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,860 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:47,863 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:47,865 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:47,872 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:47,872 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:9 [2020-12-09 16:24:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:47,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:47,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623557757] [2020-12-09 16:24:47,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:47,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:24:47,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606309747] [2020-12-09 16:24:47,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:24:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:24:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:47,900 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 5 states. [2020-12-09 16:24:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:48,196 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-09 16:24:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:24:48,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 16:24:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:48,197 INFO L225 Difference]: With dead ends: 90 [2020-12-09 16:24:48,197 INFO L226 Difference]: Without dead ends: 90 [2020-12-09 16:24:48,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:24:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-09 16:24:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 64. [2020-12-09 16:24:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 16:24:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-09 16:24:48,200 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 9 [2020-12-09 16:24:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:48,200 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-09 16:24:48,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:24:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-09 16:24:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:24:48,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:48,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:48,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 16:24:48,402 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1180846158, now seen corresponding path program 1 times [2020-12-09 16:24:48,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:48,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569669281] [2020-12-09 16:24:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:24:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:48,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569669281] [2020-12-09 16:24:48,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:48,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:24:48,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421471137] [2020-12-09 16:24:48,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:24:48,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:24:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:24:48,600 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 4 states. [2020-12-09 16:24:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:48,616 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-12-09 16:24:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:48,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 16:24:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:48,617 INFO L225 Difference]: With dead ends: 86 [2020-12-09 16:24:48,617 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 16:24:48,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 16:24:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-12-09 16:24:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 16:24:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-09 16:24:48,619 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 9 [2020-12-09 16:24:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:48,619 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-09 16:24:48,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:24:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-09 16:24:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:24:48,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:48,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:48,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 16:24:48,821 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:48,822 INFO L82 PathProgramCache]: Analyzing trace with hash 241733103, now seen corresponding path program 1 times [2020-12-09 16:24:48,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:48,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117803947] [2020-12-09 16:24:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:24:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:49,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:49,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117803947] [2020-12-09 16:24:49,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:49,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:24:49,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170715175] [2020-12-09 16:24:49,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:24:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:24:49,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:24:49,005 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 4 states. [2020-12-09 16:24:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:49,138 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-12-09 16:24:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:49,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 16:24:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:49,139 INFO L225 Difference]: With dead ends: 85 [2020-12-09 16:24:49,139 INFO L226 Difference]: Without dead ends: 85 [2020-12-09 16:24:49,139 INFO L677 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 [2020-12-09 16:24:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-09 16:24:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2020-12-09 16:24:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 16:24:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-09 16:24:49,142 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 11 [2020-12-09 16:24:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:49,142 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-09 16:24:49,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:24:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-09 16:24:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:24:49,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:49,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:49,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 16:24:49,344 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash 241733104, now seen corresponding path program 1 times [2020-12-09 16:24:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:49,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091162575] [2020-12-09 16:24:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 16:24:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:49,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:49,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091162575] [2020-12-09 16:24:49,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:49,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:24:49,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022091958] [2020-12-09 16:24:49,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:24:49,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:24:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:24:49,465 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 6 states. [2020-12-09 16:24:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:49,672 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-12-09 16:24:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:24:49,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 16:24:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:49,673 INFO L225 Difference]: With dead ends: 84 [2020-12-09 16:24:49,673 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 16:24:49,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-09 16:24:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 16:24:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2020-12-09 16:24:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 16:24:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-09 16:24:49,676 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 11 [2020-12-09 16:24:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:49,676 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-09 16:24:49,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:24:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-09 16:24:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:24:49,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:49,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:49,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 16:24:49,878 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash -606195921, now seen corresponding path program 1 times [2020-12-09 16:24:49,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:49,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035212700] [2020-12-09 16:24:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 16:24:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:50,073 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:50,074 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:50,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:50,091 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:50,092 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:50,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:50,098 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:50,098 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2020-12-09 16:24:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:50,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:50,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035212700] [2020-12-09 16:24:50,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:50,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:24:50,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906566128] [2020-12-09 16:24:50,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:24:50,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:24:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:50,133 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 5 states. [2020-12-09 16:24:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:50,291 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-12-09 16:24:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:24:50,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 16:24:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:50,293 INFO L225 Difference]: With dead ends: 65 [2020-12-09 16:24:50,293 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 16:24:50,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:24:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 16:24:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-12-09 16:24:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 16:24:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-09 16:24:50,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 12 [2020-12-09 16:24:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:50,295 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-09 16:24:50,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:24:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-09 16:24:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 16:24:50,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:50,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:50,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 16:24:50,496 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1612205465, now seen corresponding path program 1 times [2020-12-09 16:24:50,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:50,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082387701] [2020-12-09 16:24:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:50,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 16:24:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:50,567 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 16:24:50,567 INFO L382 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 11 [2020-12-09 16:24:50,568 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:50,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:50,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:50,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2020-12-09 16:24:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:50,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:50,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082387701] [2020-12-09 16:24:50,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:50,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:24:50,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454950892] [2020-12-09 16:24:50,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:24:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:24:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:24:50,599 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 4 states. [2020-12-09 16:24:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:50,732 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-12-09 16:24:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:50,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 16:24:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:50,733 INFO L225 Difference]: With dead ends: 63 [2020-12-09 16:24:50,733 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 16:24:50,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 16:24:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-12-09 16:24:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 16:24:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-09 16:24:50,735 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 13 [2020-12-09 16:24:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:50,735 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-09 16:24:50,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:24:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-09 16:24:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 16:24:50,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:50,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:50,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 16:24:50,937 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1612205466, now seen corresponding path program 1 times [2020-12-09 16:24:50,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:50,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343737037] [2020-12-09 16:24:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:24:51,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:51,155 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:24:51,156 INFO L382 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 33 [2020-12-09 16:24:51,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:51,173 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-12-09 16:24:51,173 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:51,174 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:51,174 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:25 [2020-12-09 16:24:51,175 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:51,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:51,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343737037] [2020-12-09 16:24:51,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:51,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:24:51,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506793280] [2020-12-09 16:24:51,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:24:51,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:51,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:24:51,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:24:51,192 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 4 states. [2020-12-09 16:24:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:51,299 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-12-09 16:24:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:24:51,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 16:24:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:51,300 INFO L225 Difference]: With dead ends: 57 [2020-12-09 16:24:51,300 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 16:24:51,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:24:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 16:24:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 16:24:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 16:24:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-09 16:24:51,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 13 [2020-12-09 16:24:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:51,301 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-09 16:24:51,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:24:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-09 16:24:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 16:24:51,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:51,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:51,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 16:24:51,503 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1153742667, now seen corresponding path program 1 times [2020-12-09 16:24:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:51,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561739815] [2020-12-09 16:24:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 16:24:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:51,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561739815] [2020-12-09 16:24:51,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:51,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:24:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119870094] [2020-12-09 16:24:51,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:24:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:24:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:24:51,637 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 3 states. [2020-12-09 16:24:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:51,742 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-09 16:24:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:24:51,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-09 16:24:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:51,743 INFO L225 Difference]: With dead ends: 58 [2020-12-09 16:24:51,744 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 16:24:51,744 INFO L677 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 [2020-12-09 16:24:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 16:24:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 16:24:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 16:24:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-09 16:24:51,745 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 15 [2020-12-09 16:24:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:51,745 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-09 16:24:51,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:24:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-09 16:24:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 16:24:51,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:51,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:51,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 16:24:51,948 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -440390413, now seen corresponding path program 1 times [2020-12-09 16:24:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966673500] [2020-12-09 16:24:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 16:24:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:52,042 INFO L382 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 [2020-12-09 16:24:52,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:52,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 16:24:52,085 INFO L382 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 [2020-12-09 16:24:52,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:52,090 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2020-12-09 16:24:52,103 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-09 16:24:52,104 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:52,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:5 [2020-12-09 16:24:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:52,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:52,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966673500] [2020-12-09 16:24:52,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:52,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 16:24:52,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292620627] [2020-12-09 16:24:52,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 16:24:52,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 16:24:52,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-09 16:24:52,126 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 9 states. [2020-12-09 16:24:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:52,635 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-09 16:24:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 16:24:52,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-09 16:24:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:52,636 INFO L225 Difference]: With dead ends: 68 [2020-12-09 16:24:52,636 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 16:24:52,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-09 16:24:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 16:24:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-12-09 16:24:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 16:24:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-09 16:24:52,638 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 16 [2020-12-09 16:24:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:52,638 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-09 16:24:52,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 16:24:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-09 16:24:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 16:24:52,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:52,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:52,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-12-09 16:24:52,840 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash -440390412, now seen corresponding path program 1 times [2020-12-09 16:24:52,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:52,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037313619] [2020-12-09 16:24:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 16:24:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:52,978 INFO L382 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 [2020-12-09 16:24:52,979 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:52,985 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:52,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 16:24:53,048 INFO L382 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 [2020-12-09 16:24:53,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:53,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:53,059 INFO L382 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 [2020-12-09 16:24:53,060 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:53,066 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:53,067 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:53,067 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:19 [2020-12-09 16:24:53,091 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:53,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:53,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:53,100 INFO L382 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 17 treesize of output 9 [2020-12-09 16:24:53,101 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:53,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:53,105 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:53,105 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:11 [2020-12-09 16:24:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:53,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:53,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037313619] [2020-12-09 16:24:53,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:53,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 16:24:53,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804119454] [2020-12-09 16:24:53,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 16:24:53,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 16:24:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-09 16:24:53,144 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 10 states. [2020-12-09 16:24:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:53,867 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-12-09 16:24:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 16:24:53,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-09 16:24:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:53,869 INFO L225 Difference]: With dead ends: 67 [2020-12-09 16:24:53,869 INFO L226 Difference]: Without dead ends: 67 [2020-12-09 16:24:53,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-09 16:24:53,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-09 16:24:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-12-09 16:24:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 16:24:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-09 16:24:53,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 16 [2020-12-09 16:24:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:53,871 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-09 16:24:53,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 16:24:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-09 16:24:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 16:24:53,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:53,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:54,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-12-09 16:24:54,073 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1454308763, now seen corresponding path program 1 times [2020-12-09 16:24:54,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:54,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265109870] [2020-12-09 16:24:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 16:24:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:54,239 INFO L382 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 [2020-12-09 16:24:54,239 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:54,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:54,241 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:54,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 16:24:54,282 INFO L382 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 [2020-12-09 16:24:54,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:54,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:54,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:54,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2020-12-09 16:24:54,300 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-09 16:24:54,301 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:54,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:54,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:54,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:5 [2020-12-09 16:24:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:54,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:54,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265109870] [2020-12-09 16:24:54,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:54,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 16:24:54,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510203951] [2020-12-09 16:24:54,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 16:24:54,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 16:24:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-09 16:24:54,335 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 10 states. [2020-12-09 16:24:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:54,966 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-09 16:24:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 16:24:54,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-09 16:24:54,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:54,967 INFO L225 Difference]: With dead ends: 64 [2020-12-09 16:24:54,967 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 16:24:54,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-09 16:24:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 16:24:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2020-12-09 16:24:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 16:24:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-09 16:24:54,969 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 19 [2020-12-09 16:24:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:54,969 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-09 16:24:54,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 16:24:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-09 16:24:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 16:24:54,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:54,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:55,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3 [2020-12-09 16:24:55,171 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1454308764, now seen corresponding path program 1 times [2020-12-09 16:24:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:55,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203173725] [2020-12-09 16:24:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-09 16:24:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:55,282 INFO L382 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 [2020-12-09 16:24:55,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:55,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 16:24:55,347 INFO L382 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 [2020-12-09 16:24:55,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,357 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:55,360 INFO L382 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 [2020-12-09 16:24:55,361 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,369 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:55,370 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,370 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:19 [2020-12-09 16:24:55,392 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:55,393 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:55,402 INFO L382 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 17 treesize of output 9 [2020-12-09 16:24:55,402 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:55,407 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:55,407 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2020-12-09 16:24:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:55,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203173725] [2020-12-09 16:24:55,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:55,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-09 16:24:55,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791224038] [2020-12-09 16:24:55,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 16:24:55,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 16:24:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-09 16:24:55,460 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2020-12-09 16:24:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:56,462 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-09 16:24:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 16:24:56,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-09 16:24:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:56,463 INFO L225 Difference]: With dead ends: 74 [2020-12-09 16:24:56,463 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 16:24:56,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-12-09 16:24:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 16:24:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 46. [2020-12-09 16:24:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 16:24:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-09 16:24:56,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 19 [2020-12-09 16:24:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:56,465 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-09 16:24:56,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 16:24:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-09 16:24:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 16:24:56,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:56,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:24:56,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3 [2020-12-09 16:24:56,666 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:56,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2133897595, now seen corresponding path program 1 times [2020-12-09 16:24:56,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:56,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773037955] [2020-12-09 16:24:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 16:24:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:56,794 INFO L382 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 [2020-12-09 16:24:56,795 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:56,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:56,799 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:56,799 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-09 16:24:56,816 INFO L382 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 15 treesize of output 7 [2020-12-09 16:24:56,817 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:56,821 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:56,821 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:56,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:9 [2020-12-09 16:24:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:56,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773037955] [2020-12-09 16:24:56,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:56,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 16:24:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116180722] [2020-12-09 16:24:56,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 16:24:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 16:24:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-09 16:24:56,849 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 10 states. [2020-12-09 16:24:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:24:57,165 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-09 16:24:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 16:24:57,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-09 16:24:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:24:57,166 INFO L225 Difference]: With dead ends: 55 [2020-12-09 16:24:57,166 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 16:24:57,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-12-09 16:24:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 16:24:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-12-09 16:24:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 16:24:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-09 16:24:57,168 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 20 [2020-12-09 16:24:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:24:57,168 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-09 16:24:57,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 16:24:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-09 16:24:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 16:24:57,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:24:57,168 INFO L422 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] [2020-12-09 16:24:57,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-12-09 16:24:57,369 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:24:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:24:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1977268703, now seen corresponding path program 1 times [2020-12-09 16:24:57,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:24:57,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401427936] [2020-12-09 16:24:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-12-09 16:24:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:24:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-09 16:24:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:24:57,538 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:24:57,539 INFO L382 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 33 [2020-12-09 16:24:57,540 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,566 INFO L625 ElimStorePlain]: treesize reduction 12, result has 74.5 percent of original size [2020-12-09 16:24:57,567 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:57,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:57,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:35 [2020-12-09 16:24:57,568 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:24:57,593 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,593 INFO L382 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 13 treesize of output 17 [2020-12-09 16:24:57,594 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,601 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,601 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,602 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:18 [2020-12-09 16:24:57,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 16:24:57,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,668 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,668 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,668 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:27 [2020-12-09 16:24:57,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 16:24:57,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,747 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-09 16:24:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:24:57,785 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-09 16:24:57,786 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,803 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,803 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:42 [2020-12-09 16:24:57,847 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_27|], 4=[|v_#memory_$Pointer$.base_30|]} [2020-12-09 16:24:57,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-09 16:24:57,852 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,870 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2020-12-09 16:24:57,874 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,890 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:57,890 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:55 [2020-12-09 16:24:57,938 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2020-12-09 16:24:57,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:57,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:57,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:24:57,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:56 [2020-12-09 16:24:58,195 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:58,195 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 44 [2020-12-09 16:24:58,197 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:24:58,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:24:58,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:24:58,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:7 [2020-12-09 16:24:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:24:58,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:24:58,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401427936] [2020-12-09 16:24:58,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:24:58,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-09 16:24:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202362609] [2020-12-09 16:24:58,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 16:24:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:24:58,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 16:24:58,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-12-09 16:24:58,264 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 16 states. [2020-12-09 16:24:59,210 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-09 16:24:59,739 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-09 16:24:59,952 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-09 16:25:00,171 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 16:25:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:00,666 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-09 16:25:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 16:25:00,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-09 16:25:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:00,667 INFO L225 Difference]: With dead ends: 53 [2020-12-09 16:25:00,667 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 16:25:00,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 16:25:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 16:25:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-09 16:25:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 16:25:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-09 16:25:00,668 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 22 [2020-12-09 16:25:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:00,669 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-09 16:25:00,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 16:25:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-09 16:25:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 16:25:00,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:00,669 INFO L422 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] [2020-12-09 16:25:00,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-12-09 16:25:00,870 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1977268704, now seen corresponding path program 1 times [2020-12-09 16:25:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:00,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071359189] [2020-12-09 16:25:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-09 16:25:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:01,070 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:25:01,070 INFO L382 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 33 [2020-12-09 16:25:01,071 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,099 INFO L625 ElimStorePlain]: treesize reduction 12, result has 77.8 percent of original size [2020-12-09 16:25:01,100 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:25:01,101 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:01,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:42 [2020-12-09 16:25:01,102 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:25:01,128 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,128 INFO L382 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 13 treesize of output 17 [2020-12-09 16:25:01,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,138 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,139 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,139 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:25 [2020-12-09 16:25:01,203 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 16:25:01,204 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,221 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,225 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 16:25:01,226 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,240 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,240 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:23 [2020-12-09 16:25:01,348 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 16:25:01,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,369 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,373 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 16:25:01,374 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,392 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,392 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:48, output treesize:40 [2020-12-09 16:25:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:01,444 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-09 16:25:01,444 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,475 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:01,481 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-09 16:25:01,481 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,507 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,507 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:58 [2020-12-09 16:25:01,569 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 54 [2020-12-09 16:25:01,570 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,595 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:01,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:01,601 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 48 [2020-12-09 16:25:01,602 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:01,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:01,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:01,625 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:65 [2020-12-09 16:25:02,143 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:02,143 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 109 [2020-12-09 16:25:02,145 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:02,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:02,164 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:02,164 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 33 [2020-12-09 16:25:02,165 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:02,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:02,172 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:02,172 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:147, output treesize:9 [2020-12-09 16:25:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:02,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:02,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071359189] [2020-12-09 16:25:02,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:02,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-09 16:25:02,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994580775] [2020-12-09 16:25:02,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 16:25:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 16:25:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-12-09 16:25:02,260 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-12-09 16:25:03,057 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-12-09 16:25:03,346 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-09 16:25:03,601 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-12-09 16:25:03,757 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-09 16:25:03,989 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-09 16:25:04,246 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-09 16:25:04,612 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-12-09 16:25:05,113 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-09 16:25:05,608 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-12-09 16:25:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:06,409 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-12-09 16:25:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 16:25:06,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-12-09 16:25:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:06,410 INFO L225 Difference]: With dead ends: 71 [2020-12-09 16:25:06,411 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 16:25:06,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 16:25:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 16:25:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-12-09 16:25:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 16:25:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-09 16:25:06,412 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 22 [2020-12-09 16:25:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:06,413 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-09 16:25:06,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 16:25:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-09 16:25:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 16:25:06,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:06,413 INFO L422 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] [2020-12-09 16:25:06,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 mathsat -unsat_core_generation=3 [2020-12-09 16:25:06,615 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1165787682, now seen corresponding path program 1 times [2020-12-09 16:25:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:06,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875562569] [2020-12-09 16:25:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-09 16:25:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:06,789 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:25:06,789 INFO L382 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 33 [2020-12-09 16:25:06,790 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:06,817 INFO L625 ElimStorePlain]: treesize reduction 12, result has 75.5 percent of original size [2020-12-09 16:25:06,828 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 16:25:06,828 INFO L382 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 11 [2020-12-09 16:25:06,829 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:06,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:06,843 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:06,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:06,843 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:38 [2020-12-09 16:25:06,844 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:06,857 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:06,869 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:06,870 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 16:25:06,871 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-12-09 16:25:06,938 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:06,939 INFO L382 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 23 treesize of output 63 [2020-12-09 16:25:06,940 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:06,970 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:06,971 INFO L382 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 18 treesize of output 36 [2020-12-09 16:25:06,972 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:06,992 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:06,992 INFO L382 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 18 treesize of output 36 [2020-12-09 16:25:06,993 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,123 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 16:25:07,123 INFO L625 ElimStorePlain]: treesize reduction 44, result has 60.4 percent of original size [2020-12-09 16:25:07,146 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,146 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 32 [2020-12-09 16:25:07,147 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,161 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,161 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 32 [2020-12-09 16:25:07,163 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,202 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,204 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-12-09 16:25:07,204 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:135, output treesize:51 [2020-12-09 16:25:07,311 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 16:25:07,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,339 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 16:25:07,340 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,358 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:50, output treesize:42 [2020-12-09 16:25:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:07,408 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2020-12-09 16:25:07,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,427 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2020-12-09 16:25:07,431 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,447 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,448 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:07,448 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:49 [2020-12-09 16:25:07,675 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,675 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 87 [2020-12-09 16:25:07,676 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,687 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,693 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,693 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2020-12-09 16:25:07,694 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:07,700 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:07,701 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:9 [2020-12-09 16:25:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:07,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:07,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875562569] [2020-12-09 16:25:07,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:07,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-09 16:25:07,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691044972] [2020-12-09 16:25:07,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 16:25:07,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 16:25:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-12-09 16:25:07,768 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 14 states. [2020-12-09 16:25:08,669 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-12-09 16:25:08,852 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-09 16:25:09,073 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-09 16:25:09,292 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-12-09 16:25:09,548 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-09 16:25:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:12,522 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-09 16:25:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 16:25:12,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-09 16:25:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:12,523 INFO L225 Difference]: With dead ends: 70 [2020-12-09 16:25:12,523 INFO L226 Difference]: Without dead ends: 70 [2020-12-09 16:25:12,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2020-12-09 16:25:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-09 16:25:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-12-09 16:25:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 16:25:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-09 16:25:12,525 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 23 [2020-12-09 16:25:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:12,525 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-09 16:25:12,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 16:25:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-09 16:25:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 16:25:12,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:12,525 INFO L422 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] [2020-12-09 16:25:12,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 mathsat -unsat_core_generation=3 [2020-12-09 16:25:12,727 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1165787681, now seen corresponding path program 1 times [2020-12-09 16:25:12,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790364949] [2020-12-09 16:25:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-09 16:25:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:12,884 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:25:12,884 INFO L382 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 33 [2020-12-09 16:25:12,885 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:12,905 INFO L625 ElimStorePlain]: treesize reduction 12, result has 70.0 percent of original size [2020-12-09 16:25:12,906 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:25:12,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:12,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:28 [2020-12-09 16:25:12,907 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 16:25:12,925 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:12,926 INFO L382 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 13 treesize of output 17 [2020-12-09 16:25:12,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:12,932 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:12,932 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:12,932 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2020-12-09 16:25:13,017 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 16:25:13,018 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,032 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:13,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-09 16:25:13,066 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_33|], 2=[|v_#memory_$Pointer$.base_37|]} [2020-12-09 16:25:13,070 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-09 16:25:13,071 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:13,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2020-12-09 16:25:13,092 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,106 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:13,107 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:13,107 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:50 [2020-12-09 16:25:13,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-09 16:25:13,151 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,164 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:13,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:13,165 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:45 [2020-12-09 16:25:13,268 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:13,268 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2020-12-09 16:25:13,269 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,274 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:13,275 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:13,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:7 [2020-12-09 16:25:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:13,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:13,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790364949] [2020-12-09 16:25:13,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:13,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-09 16:25:13,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548435017] [2020-12-09 16:25:13,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 16:25:13,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 16:25:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-09 16:25:13,321 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 15 states. [2020-12-09 16:25:14,015 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-09 16:25:14,199 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-12-09 16:25:14,387 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-09 16:25:14,629 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-12-09 16:25:14,894 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-12-09 16:25:15,193 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-12-09 16:25:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:19,839 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-09 16:25:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 16:25:19,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-12-09 16:25:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:19,840 INFO L225 Difference]: With dead ends: 50 [2020-12-09 16:25:19,840 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 16:25:19,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-12-09 16:25:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 16:25:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-09 16:25:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 16:25:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-09 16:25:19,841 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 23 [2020-12-09 16:25:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:19,841 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-09 16:25:19,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 16:25:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-09 16:25:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 16:25:19,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:19,842 INFO L422 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] [2020-12-09 16:25:20,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 mathsat -unsat_core_generation=3 [2020-12-09 16:25:20,043 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 875285060, now seen corresponding path program 1 times [2020-12-09 16:25:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:20,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661940839] [2020-12-09 16:25:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:20,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 16:25:20,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:20,184 INFO L382 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 15 treesize of output 7 [2020-12-09 16:25:20,184 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:20,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:20,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:20,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-09 16:25:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:20,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:20,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661940839] [2020-12-09 16:25:20,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:20,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 16:25:20,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126810852] [2020-12-09 16:25:20,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:25:20,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:25:20,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:25:20,216 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 8 states. [2020-12-09 16:25:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:20,534 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-09 16:25:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 16:25:20,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-09 16:25:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:20,536 INFO L225 Difference]: With dead ends: 54 [2020-12-09 16:25:20,536 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 16:25:20,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-09 16:25:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 16:25:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-12-09 16:25:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 16:25:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-09 16:25:20,537 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 26 [2020-12-09 16:25:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:20,537 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-09 16:25:20,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:25:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-09 16:25:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 16:25:20,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:20,538 INFO L422 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] [2020-12-09 16:25:20,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 mathsat -unsat_core_generation=3 [2020-12-09 16:25:20,739 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash 875285061, now seen corresponding path program 1 times [2020-12-09 16:25:20,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:20,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742359286] [2020-12-09 16:25:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-09 16:25:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:20,970 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 16:25:20,970 INFO L382 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 33 [2020-12-09 16:25:20,971 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,009 INFO L625 ElimStorePlain]: treesize reduction 12, result has 81.0 percent of original size [2020-12-09 16:25:21,021 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 16:25:21,022 INFO L382 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 11 [2020-12-09 16:25:21,022 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,039 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,040 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:21,041 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:21,041 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:52 [2020-12-09 16:25:21,042 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:21,062 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:21,075 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 16:25:21,076 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 16:25:21,077 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-12-09 16:25:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,106 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,106 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 32 [2020-12-09 16:25:21,107 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,129 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 32 [2020-12-09 16:25:21,131 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,148 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,148 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 32 [2020-12-09 16:25:21,149 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,282 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-09 16:25:21,282 INFO L625 ElimStorePlain]: treesize reduction 70, result has 62.0 percent of original size [2020-12-09 16:25:21,304 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,305 INFO L382 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 16 treesize of output 34 [2020-12-09 16:25:21,306 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,341 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,342 INFO L382 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 23 treesize of output 63 [2020-12-09 16:25:21,343 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,449 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-09 16:25:21,449 INFO L625 ElimStorePlain]: treesize reduction 8, result has 92.1 percent of original size [2020-12-09 16:25:21,451 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-12-09 16:25:21,451 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:175, output treesize:81 [2020-12-09 16:25:21,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 16:25:21,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,575 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,579 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 16:25:21,579 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,595 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,596 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2020-12-09 16:25:21,671 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 16:25:21,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,692 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 16:25:21,696 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,713 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:38 [2020-12-09 16:25:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,761 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-09 16:25:21,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,789 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:25:21,794 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-09 16:25:21,794 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,818 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,818 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:56 [2020-12-09 16:25:21,878 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2020-12-09 16:25:21,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,903 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2020-12-09 16:25:21,907 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:21,927 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:21,928 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:21,928 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:63 [2020-12-09 16:25:22,140 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:22,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 98 [2020-12-09 16:25:22,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:22,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:22,160 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:22,160 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 33 [2020-12-09 16:25:22,161 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:22,168 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:22,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:22,169 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:141, output treesize:9 [2020-12-09 16:25:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:22,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:22,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742359286] [2020-12-09 16:25:22,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:22,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-09 16:25:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851864078] [2020-12-09 16:25:22,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 16:25:22,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 16:25:22,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-09 16:25:22,254 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 15 states. [2020-12-09 16:25:23,122 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-09 16:25:23,872 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-09 16:25:24,074 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-09 16:25:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:28,671 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-09 16:25:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 16:25:28,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-09 16:25:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:28,672 INFO L225 Difference]: With dead ends: 53 [2020-12-09 16:25:28,672 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 16:25:28,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2020-12-09 16:25:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 16:25:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-09 16:25:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 16:25:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-09 16:25:28,674 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 26 [2020-12-09 16:25:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:28,674 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-09 16:25:28,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 16:25:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-09 16:25:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 16:25:28,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:28,674 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:25:28,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 mathsat -unsat_core_generation=3 [2020-12-09 16:25:28,875 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash 870810440, now seen corresponding path program 1 times [2020-12-09 16:25:28,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:28,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492515248] [2020-12-09 16:25:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 16:25:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:29,062 INFO L382 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 15 treesize of output 7 [2020-12-09 16:25:29,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:29,064 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:29,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:29,065 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-09 16:25:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:29,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:25:29,153 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:29,154 INFO L382 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 14 treesize of output 18 [2020-12-09 16:25:29,155 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:29,156 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:29,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:29,158 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:29,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:3 [2020-12-09 16:25:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:29,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492515248] [2020-12-09 16:25:29,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874665555] [2020-12-09 16:25:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/cvc4 Starting monitored process 30 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:25:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 16:25:29,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:29,581 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:29,581 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-09 16:25:29,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:29,587 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:29,587 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:25:29,587 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:11 [2020-12-09 16:25:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:29,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:25:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:29,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341765842] [2020-12-09 16:25:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:25:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:25:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:30,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:30,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2020-12-09 16:25:30,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 9, 12, 9] total 23 [2020-12-09 16:25:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94319873] [2020-12-09 16:25:30,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:25:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:25:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-12-09 16:25:30,031 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 5 states. [2020-12-09 16:25:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:30,251 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-09 16:25:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:25:30,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-09 16:25:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:30,252 INFO L225 Difference]: With dead ends: 51 [2020-12-09 16:25:30,252 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 16:25:30,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-12-09 16:25:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 16:25:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-09 16:25:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 16:25:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-09 16:25:30,255 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 29 [2020-12-09 16:25:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:30,255 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-09 16:25:30,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:25:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-09 16:25:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 16:25:30,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:30,256 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:25:30,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4 --incremental --print-success --lang smt,29 mathsat -unsat_core_generation=3,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:25:30,858 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash 870810441, now seen corresponding path program 1 times [2020-12-09 16:25:30,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:30,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52631181] [2020-12-09 16:25:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 16:25:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:31,141 INFO L382 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 17 treesize of output 9 [2020-12-09 16:25:31,142 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:31,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:31,157 INFO L382 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 15 treesize of output 7 [2020-12-09 16:25:31,157 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:31,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:31,166 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:31,166 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2020-12-09 16:25:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:31,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:25:32,049 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:25:32,077 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:32,077 INFO L382 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 17 treesize of output 21 [2020-12-09 16:25:32,078 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:32,080 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:32,082 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:32,097 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:32,097 INFO L382 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 24 treesize of output 26 [2020-12-09 16:25:32,098 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:32,099 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:25:32,100 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 16:25:32,271 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-09 16:25:32,272 INFO L625 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2020-12-09 16:25:32,272 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:25:32,272 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:45 [2020-12-09 16:25:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:33,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52631181] [2020-12-09 16:25:33,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1131837142] [2020-12-09 16:25:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/cvc4 Starting monitored process 33 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:25:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 16:25:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:34,477 INFO L443 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 2=[|#memory_$Pointer$.base|]} [2020-12-09 16:25:34,480 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-09 16:25:34,481 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:34,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:34,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-09 16:25:34,503 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:34,510 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,510 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:47, output treesize:9 [2020-12-09 16:25:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:34,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:25:34,528 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:25:34,554 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:34,554 INFO L382 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 17 treesize of output 21 [2020-12-09 16:25:34,555 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:34,556 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:34,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,570 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:34,570 INFO L382 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 24 treesize of output 26 [2020-12-09 16:25:34,571 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:34,572 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:25:34,573 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 16:25:34,728 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-09 16:25:34,729 INFO L625 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2020-12-09 16:25:34,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:25:34,730 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:45 [2020-12-09 16:25:34,744 INFO L382 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 58 treesize of output 22 [2020-12-09 16:25:34,746 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:34,747 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:1 [2020-12-09 16:25:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774901563] [2020-12-09 16:25:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:25:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 16:25:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:34,986 INFO L382 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 17 treesize of output 9 [2020-12-09 16:25:34,987 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:34,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:35,000 INFO L382 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 15 treesize of output 7 [2020-12-09 16:25:35,000 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:35,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:35,008 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:35,008 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2020-12-09 16:25:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:35,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:25:35,024 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:25:35,045 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:35,046 INFO L382 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 17 treesize of output 21 [2020-12-09 16:25:35,046 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:35,047 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:35,049 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:35,062 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:35,062 INFO L382 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 24 treesize of output 26 [2020-12-09 16:25:35,063 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:25:35,064 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:25:35,065 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 16:25:35,229 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-09 16:25:35,229 INFO L625 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2020-12-09 16:25:35,230 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:25:35,230 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:45 [2020-12-09 16:25:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:25:35,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:25:35,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 10, 10, 10] total 24 [2020-12-09 16:25:35,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891311336] [2020-12-09 16:25:35,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-09 16:25:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-09 16:25:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-09 16:25:35,250 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 25 states. [2020-12-09 16:25:39,045 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:25:40,082 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-09 16:25:41,384 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-09 16:25:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:41,596 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-12-09 16:25:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 16:25:41,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-12-09 16:25:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:41,598 INFO L225 Difference]: With dead ends: 71 [2020-12-09 16:25:41,598 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 16:25:41,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 16:25:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 16:25:41,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-12-09 16:25:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 16:25:41,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-09 16:25:41,600 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 29 [2020-12-09 16:25:41,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:41,600 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-09 16:25:41,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-09 16:25:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-09 16:25:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 16:25:41,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:41,600 INFO L422 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] [2020-12-09 16:25:42,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 cvc4 --incremental --print-success --lang smt,32 mathsat -unsat_core_generation=3,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:25:42,203 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:42,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1225318766, now seen corresponding path program 1 times [2020-12-09 16:25:42,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:42,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891423064] [2020-12-09 16:25:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 16:25:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 16:25:42,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:42,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891423064] [2020-12-09 16:25:42,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:42,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:25:42,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423874192] [2020-12-09 16:25:42,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:25:42,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:25:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:25:42,428 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 6 states. [2020-12-09 16:25:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:42,606 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-09 16:25:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 16:25:42,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-12-09 16:25:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:42,608 INFO L225 Difference]: With dead ends: 54 [2020-12-09 16:25:42,608 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 16:25:42,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:25:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 16:25:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-09 16:25:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 16:25:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-09 16:25:42,609 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 30 [2020-12-09 16:25:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:42,609 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-09 16:25:42,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:25:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-09 16:25:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 16:25:42,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:42,610 INFO L422 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] [2020-12-09 16:25:42,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 mathsat -unsat_core_generation=3 [2020-12-09 16:25:42,811 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -669823897, now seen corresponding path program 1 times [2020-12-09 16:25:42,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:42,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330169581] [2020-12-09 16:25:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:25:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 16:25:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:25:42,989 INFO L382 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 15 treesize of output 7 [2020-12-09 16:25:42,990 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:42,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:43,000 INFO L382 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 15 treesize of output 7 [2020-12-09 16:25:43,000 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:25:43,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:25:43,007 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:25:43,007 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2020-12-09 16:25:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 16:25:43,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:25:43,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330169581] [2020-12-09 16:25:43,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:25:43,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 16:25:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417535280] [2020-12-09 16:25:43,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:25:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:25:43,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:25:43,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:25:43,077 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-12-09 16:25:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:25:43,445 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-12-09 16:25:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 16:25:43,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-09 16:25:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:25:43,446 INFO L225 Difference]: With dead ends: 53 [2020-12-09 16:25:43,446 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 16:25:43,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-09 16:25:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 16:25:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-09 16:25:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 16:25:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-09 16:25:43,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 31 [2020-12-09 16:25:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:25:43,448 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-09 16:25:43,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:25:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-09 16:25:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 16:25:43,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:25:43,448 INFO L422 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] [2020-12-09 16:25:43,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 mathsat -unsat_core_generation=3 [2020-12-09 16:25:43,649 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 16:25:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:25:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 710295698, now seen corresponding path program 1 times [2020-12-09 16:25:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:25:43,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498242511] [2020-12-09 16:25:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ebd0772d-89a5-49ab-b231-380d48404648/bin/utaipan/mathsat Starting monitored process 37 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with mathsat -unsat_core_generation=3 [2020-12-09 16:25:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:25:43,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:25:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:25:43,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:25:43,972 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 16:25:43,972 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:25:44,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 mathsat -unsat_core_generation=3 [2020-12-09 16:25:44,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:25:44 BoogieIcfgContainer [2020-12-09 16:25:44,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:25:44,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:25:44,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:25:44,249 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:25:44,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:24:40" (3/4) ... [2020-12-09 16:25:44,252 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:25:44,252 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:25:44,252 INFO L168 Benchmark]: Toolchain (without parser) took 64756.63 ms. Allocated memory was 60.8 MB in the beginning and 111.1 MB in the end (delta: 50.3 MB). Free memory was 38.7 MB in the beginning and 77.2 MB in the end (delta: -38.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-12-09 16:25:44,253 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:25:44,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 462.61 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 38.6 MB in the beginning and 43.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:25:44,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.32 ms. Allocated memory is still 75.5 MB. Free memory was 43.7 MB in the beginning and 41.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:25:44,253 INFO L168 Benchmark]: Boogie Preprocessor took 22.46 ms. Allocated memory is still 75.5 MB. Free memory was 41.1 MB in the beginning and 39.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:25:44,253 INFO L168 Benchmark]: RCFGBuilder took 465.18 ms. Allocated memory is still 75.5 MB. Free memory was 39.3 MB in the beginning and 53.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-12-09 16:25:44,254 INFO L168 Benchmark]: TraceAbstraction took 63760.73 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 52.9 MB in the beginning and 77.2 MB in the end (delta: -24.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2020-12-09 16:25:44,254 INFO L168 Benchmark]: Witness Printer took 2.86 ms. Allocated memory is still 111.1 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:25:44,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 462.61 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 38.6 MB in the beginning and 43.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.32 ms. Allocated memory is still 75.5 MB. Free memory was 43.7 MB in the beginning and 41.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.46 ms. Allocated memory is still 75.5 MB. Free memory was 41.1 MB in the beginning and 39.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 465.18 ms. Allocated memory is still 75.5 MB. Free memory was 39.3 MB in the beginning and 53.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 63760.73 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 52.9 MB in the beginning and 77.2 MB in the end (delta: -24.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Witness Printer took 2.86 ms. Allocated memory is still 111.1 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 780]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 780. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L757] struct ldv_list_head global_list_13 = { &(global_list_13), &(global_list_13) }; VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L763] struct A13 *p = (struct A13 *)ldv_malloc(sizeof(struct A13)); [L764] COND TRUE \read(*p) [L559] head->next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L547] next->prev = new VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L548] new->next = next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L549] new->prev = prev VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L550] prev->next = new VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L769] struct A13 *p; [L770] struct A13 *n; VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] EXPR (&global_list_13)->next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); [L771] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] EXPR (p)->list.next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); [L771] n = ({ const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );}) VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] COND TRUE &p->list != (&global_list_13) [L567] entry->prev VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L567] entry->next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L554] next->prev = prev VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L555] prev->next = next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] p = n VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] EXPR (n)->list.next VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); [L771] n = ({ const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );}) VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L771] COND FALSE !(&p->list != (&global_list_13)) VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L540] list->next = list VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] [L541] list->prev = list VAL [global_list_13={3:0}, ldv_global_msg_list={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 62 locations, 29 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 63.6s, OverallIterations: 32, TraceHistogramMax: 2, AutomataDifference: 38.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1009 SDtfs, 4437 SDslu, 2245 SDs, 0 SdLazy, 4703 SolverSat, 323 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 22.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 501 SyntacticMatches, 13 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 20.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 698 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 12.5s InterpolantComputationTime, 656 NumberOfCodeBlocks, 656 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 729 ConstructedInterpolants, 72 QuantifiedInterpolants, 236853 SizeOfPredicates, 576 NumberOfNonLiveVariables, 3883 ConjunctsInSsa, 674 ConjunctsInUnsatCore, 40 InterpolantComputations, 30 PerfectInterpolantSequences, 4/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...