./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:41:26,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:41:26,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:41:26,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:41:26,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:41:26,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:41:26,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:41:26,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:41:26,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:41:26,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:41:26,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:41:26,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:41:26,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:41:26,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:41:26,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:41:26,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:41:26,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:41:26,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:41:26,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:41:26,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:41:26,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:41:26,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:41:26,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:41:26,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:41:26,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:41:26,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:41:26,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:41:26,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:41:26,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:41:26,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:41:26,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:41:26,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:41:26,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:41:26,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:41:26,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:41:26,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:41:26,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:41:26,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:41:26,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:41:26,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:41:26,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:41:26,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:41:26,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:41:26,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:41:26,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:41:26,312 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:41:26,312 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:41:26,319 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:41:26,319 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:41:26,320 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:41:26,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:41:26,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:41:26,322 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:41:26,322 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:41:26,322 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:41:26,323 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:41:26,323 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:41:26,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:41:26,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:41:26,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:41:26,325 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:41:26,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:41:26,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:41:26,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:41:26,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:41:26,327 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:41:26,327 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:41:26,328 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:41:26,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:41:26,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:41:26,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:41:26,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:41:26,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:41:26,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:41:26,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:26,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:41:26,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:41:26,333 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:41:26,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:41:26,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:41:26,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:41:26,334 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 [2021-11-07 01:41:26,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:41:26,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:41:26,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:41:26,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:41:26,696 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:41:26,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety-ext/tree_dsw.i [2021-11-07 01:41:26,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/b9a9adc71/b1280a2322c14b679461e1918e0ab61f/FLAG759dae127 [2021-11-07 01:41:27,333 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:41:27,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/sv-benchmarks/c/memsafety-ext/tree_dsw.i [2021-11-07 01:41:27,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/b9a9adc71/b1280a2322c14b679461e1918e0ab61f/FLAG759dae127 [2021-11-07 01:41:27,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/b9a9adc71/b1280a2322c14b679461e1918e0ab61f [2021-11-07 01:41:27,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:41:27,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:41:27,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:27,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:41:27,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:41:27,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:27" (1/1) ... [2021-11-07 01:41:27,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23183a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:27, skipping insertion in model container [2021-11-07 01:41:27,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:27" (1/1) ... [2021-11-07 01:41:27,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:41:27,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:41:28,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:28,086 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:41:28,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@647c5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:28, skipping insertion in model container [2021-11-07 01:41:28,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:28,087 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:41:28,092 INFO L168 Benchmark]: Toolchain (without parser) took 428.82 ms. Allocated memory is still 123.7 MB. Free memory was 91.3 MB in the beginning and 96.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:41:28,093 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 123.7 MB. Free memory is still 78.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:41:28,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.90 ms. Allocated memory is still 123.7 MB. Free memory was 91.3 MB in the beginning and 96.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:41:28,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 123.7 MB. Free memory is still 78.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 419.90 ms. Allocated memory is still 123.7 MB. Free memory was 91.3 MB in the beginning and 96.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 571]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:41:30,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:41:30,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:41:30,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:41:30,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:41:30,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:41:30,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:41:30,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:41:30,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:41:30,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:41:30,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:41:30,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:41:30,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:41:30,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:41:30,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:41:30,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:41:30,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:41:30,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:41:30,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:41:30,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:41:30,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:41:30,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:41:30,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:41:30,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:41:30,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:41:30,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:41:30,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:41:30,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:41:30,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:41:30,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:41:30,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:41:30,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:41:30,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:41:30,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:41:30,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:41:30,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:41:30,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:41:30,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:41:30,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:41:30,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:41:30,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:41:30,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:41:30,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:41:30,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:41:30,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:41:30,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:41:30,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:41:30,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:41:30,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:41:30,652 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:41:30,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:41:30,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:41:30,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:41:30,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:41:30,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:41:30,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:41:30,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:41:30,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:41:30,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:41:30,657 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:41:30,657 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:41:30,657 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:41:30,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:41:30,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:41:30,658 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:41:30,658 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:41:30,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:41:30,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:41:30,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:41:30,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:41:30,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:41:30,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:30,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:41:30,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:41:30,661 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:41:30,661 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:30,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:41:30,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:41:30,662 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 [2021-11-07 01:41:31,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:41:31,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:41:31,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:41:31,060 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:41:31,060 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:41:31,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety-ext/tree_dsw.i [2021-11-07 01:41:31,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/c98735c3b/38413a5286c24713a3dd9d96ada6a8bc/FLAG731a4b2e3 [2021-11-07 01:41:31,904 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:41:31,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/sv-benchmarks/c/memsafety-ext/tree_dsw.i [2021-11-07 01:41:31,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/c98735c3b/38413a5286c24713a3dd9d96ada6a8bc/FLAG731a4b2e3 [2021-11-07 01:41:32,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/data/c98735c3b/38413a5286c24713a3dd9d96ada6a8bc [2021-11-07 01:41:32,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:41:32,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:41:32,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:32,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:41:32,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:41:32,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb72309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32, skipping insertion in model container [2021-11-07 01:41:32,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:41:32,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:41:32,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:32,712 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:41:32,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:41:32,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:32,769 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:41:32,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:32,868 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:41:32,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32 WrapperNode [2021-11-07 01:41:32,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:32,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:41:32,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:41:32,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:41:32,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:41:32,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:41:32,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:41:32,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:41:32,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:32,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:41:32,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:41:32,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:41:32,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:41:33,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (1/1) ... [2021-11-07 01:41:33,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:41:33,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:41:33,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:41:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:41:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:41:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:41:33,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:41:33,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:41:33,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:41:33,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:41:33,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:41:34,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:41:34,365 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 01:41:34,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:34 BoogieIcfgContainer [2021-11-07 01:41:34,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:41:34,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:41:34,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:41:34,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:41:34,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:32" (1/3) ... [2021-11-07 01:41:34,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73091a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:34, skipping insertion in model container [2021-11-07 01:41:34,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32" (2/3) ... [2021-11-07 01:41:34,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73091a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:34, skipping insertion in model container [2021-11-07 01:41:34,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:34" (3/3) ... [2021-11-07 01:41:34,376 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_dsw.i [2021-11-07 01:41:34,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:41:34,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2021-11-07 01:41:34,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:41:34,460 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:41:34,461 INFO L340 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2021-11-07 01:41:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 77 states have (on average 2.207792207792208) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:41:34,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:34,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:41:34,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 01:41:34,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:34,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128684945] [2021-11-07 01:41:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:34,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:34,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:34,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:34,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:41:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:34,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:34,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:34,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:34,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:34,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128684945] [2021-11-07 01:41:34,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128684945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:34,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:34,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:41:34,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081623029] [2021-11-07 01:41:34,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:34,803 INFO L87 Difference]: Start difference. First operand has 155 states, 77 states have (on average 2.207792207792208) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:35,191 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2021-11-07 01:41:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:41:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:35,209 INFO L225 Difference]: With dead ends: 169 [2021-11-07 01:41:35,209 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 01:41:35,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 01:41:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-11-07 01:41:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 150 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2021-11-07 01:41:35,271 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 3 [2021-11-07 01:41:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:35,277 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2021-11-07 01:41:35,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2021-11-07 01:41:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:41:35,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:35,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:41:35,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:35,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:35,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 01:41:35,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:35,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241068827] [2021-11-07 01:41:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:35,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:35,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:35,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:41:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:35,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:35,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:35,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:35,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241068827] [2021-11-07 01:41:35,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241068827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:35,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:35,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:41:35,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358397977] [2021-11-07 01:41:35,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:35,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:35,678 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:36,136 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2021-11-07 01:41:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:41:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:36,139 INFO L225 Difference]: With dead ends: 149 [2021-11-07 01:41:36,139 INFO L226 Difference]: Without dead ends: 149 [2021-11-07 01:41:36,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-07 01:41:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-07 01:41:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 148 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2021-11-07 01:41:36,155 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 3 [2021-11-07 01:41:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:36,156 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2021-11-07 01:41:36,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2021-11-07 01:41:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:41:36,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:36,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:41:36,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:36,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:36,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash 889446412, now seen corresponding path program 1 times [2021-11-07 01:41:36,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:36,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959287717] [2021-11-07 01:41:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:36,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:36,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:36,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:36,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:41:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:36,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:36,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:36,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959287717] [2021-11-07 01:41:36,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959287717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:36,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:36,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676882138] [2021-11-07 01:41:36,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:36,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:36,559 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:37,099 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2021-11-07 01:41:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:41:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:41:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:37,101 INFO L225 Difference]: With dead ends: 159 [2021-11-07 01:41:37,101 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 01:41:37,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 01:41:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2021-11-07 01:41:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 133 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-11-07 01:41:37,119 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 6 [2021-11-07 01:41:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:37,119 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-11-07 01:41:37,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-11-07 01:41:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:41:37,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:37,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:41:37,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:37,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:37,321 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash 889446413, now seen corresponding path program 1 times [2021-11-07 01:41:37,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:37,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350468122] [2021-11-07 01:41:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:37,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:37,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:37,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:37,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:41:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:41:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:37,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:37,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:37,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:37,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350468122] [2021-11-07 01:41:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350468122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:37,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:37,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:41:37,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461877841] [2021-11-07 01:41:37,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:37,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:37,699 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:38,581 INFO L93 Difference]: Finished difference Result 199 states and 219 transitions. [2021-11-07 01:41:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:41:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:41:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:38,585 INFO L225 Difference]: With dead ends: 199 [2021-11-07 01:41:38,585 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 01:41:38,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:41:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 01:41:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2021-11-07 01:41:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 109 states have (on average 1.6697247706422018) internal successors, (182), 158 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2021-11-07 01:41:38,596 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 6 [2021-11-07 01:41:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:38,597 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2021-11-07 01:41:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2021-11-07 01:41:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:41:38,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:38,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:38,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:38,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:38,809 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1845826674, now seen corresponding path program 1 times [2021-11-07 01:41:38,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:38,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029842152] [2021-11-07 01:41:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:38,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:38,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:38,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:41:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:38,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:38,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:38,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:38,945 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:41:38,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-07 01:41:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:38,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:39,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029842152] [2021-11-07 01:41:39,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029842152] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:39,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:39,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:41:39,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833327439] [2021-11-07 01:41:39,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:39,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:39,025 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:39,435 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2021-11-07 01:41:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:41:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:39,437 INFO L225 Difference]: With dead ends: 176 [2021-11-07 01:41:39,437 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 01:41:39,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 01:41:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2021-11-07 01:41:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 109 states have (on average 1.6605504587155964) internal successors, (181), 158 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2021-11-07 01:41:39,445 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 9 [2021-11-07 01:41:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:39,445 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2021-11-07 01:41:39,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2021-11-07 01:41:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:41:39,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:39,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:39,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:39,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:39,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:39,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1772597097, now seen corresponding path program 1 times [2021-11-07 01:41:39,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:39,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964415153] [2021-11-07 01:41:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:39,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:39,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:39,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:41:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:39,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:39,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:39,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:39,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964415153] [2021-11-07 01:41:39,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964415153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:39,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:39,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:39,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544540640] [2021-11-07 01:41:39,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:39,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:39,822 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:39,835 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-11-07 01:41:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:41:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:39,837 INFO L225 Difference]: With dead ends: 161 [2021-11-07 01:41:39,837 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 01:41:39,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 01:41:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-07 01:41:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 160 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-11-07 01:41:39,844 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 13 [2021-11-07 01:41:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:39,844 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-11-07 01:41:39,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-11-07 01:41:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:41:39,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:39,845 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:39,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:40,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:40,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 131239230, now seen corresponding path program 1 times [2021-11-07 01:41:40,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:40,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225263790] [2021-11-07 01:41:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:40,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:40,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:40,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:41:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:40,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:40,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-07 01:41:40,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-07 01:41:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:40,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:40,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225263790] [2021-11-07 01:41:40,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225263790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:40,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:40,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:41:40,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516004240] [2021-11-07 01:41:40,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:41:40,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:41:40,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:40,297 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:40,841 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2021-11-07 01:41:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:41:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:40,843 INFO L225 Difference]: With dead ends: 160 [2021-11-07 01:41:40,843 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 01:41:40,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:41:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 01:41:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-07 01:41:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 111 states have (on average 1.6306306306306306) internal successors, (181), 159 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 181 transitions. [2021-11-07 01:41:40,849 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 181 transitions. Word has length 15 [2021-11-07 01:41:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:40,850 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 181 transitions. [2021-11-07 01:41:40,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 181 transitions. [2021-11-07 01:41:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:41:40,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:40,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:40,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:41,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:41,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:41,053 INFO L85 PathProgramCache]: Analyzing trace with hash 131239231, now seen corresponding path program 1 times [2021-11-07 01:41:41,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:41,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158528654] [2021-11-07 01:41:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:41,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:41,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:41,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:41,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:41:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:41,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:41:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:41,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:41,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:41:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 01:41:41,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:41:41,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 01:41:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:41,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:41,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:41,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158528654] [2021-11-07 01:41:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158528654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:41,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:41,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:41:41,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936508856] [2021-11-07 01:41:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:41:41,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:41:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:41:41,530 INFO L87 Difference]: Start difference. First operand 160 states and 181 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:42,898 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2021-11-07 01:41:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:41:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:42,901 INFO L225 Difference]: With dead ends: 159 [2021-11-07 01:41:42,901 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 01:41:42,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 01:41:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-07 01:41:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 111 states have (on average 1.6126126126126126) internal successors, (179), 158 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2021-11-07 01:41:42,908 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 15 [2021-11-07 01:41:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:42,909 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2021-11-07 01:41:42,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2021-11-07 01:41:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:41:42,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:42,910 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:42,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:43,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:43,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1899349350, now seen corresponding path program 1 times [2021-11-07 01:41:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:43,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874489008] [2021-11-07 01:41:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:43,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:43,127 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:41:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:41:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:41:43,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:41:43,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 01:41:43,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 01:41:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:43,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:43,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:43,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874489008] [2021-11-07 01:41:43,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874489008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:43,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:43,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:41:43,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667933911] [2021-11-07 01:41:43,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:43,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:43,627 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:44,436 INFO L93 Difference]: Finished difference Result 197 states and 224 transitions. [2021-11-07 01:41:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:41:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:41:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:44,438 INFO L225 Difference]: With dead ends: 197 [2021-11-07 01:41:44,439 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 01:41:44,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 01:41:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-11-07 01:41:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 122 states have (on average 1.5901639344262295) internal successors, (194), 169 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 194 transitions. [2021-11-07 01:41:44,445 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 194 transitions. Word has length 15 [2021-11-07 01:41:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:44,446 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 194 transitions. [2021-11-07 01:41:44,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 194 transitions. [2021-11-07 01:41:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:41:44,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:44,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:44,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:44,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:44,661 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1534751881, now seen corresponding path program 1 times [2021-11-07 01:41:44,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:44,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161733280] [2021-11-07 01:41:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:44,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:44,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:44,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:41:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:44,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-07 01:41:44,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-07 01:41:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:44,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:44,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:44,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161733280] [2021-11-07 01:41:44,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161733280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:44,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:44,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:41:44,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516750997] [2021-11-07 01:41:44,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:41:44,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:41:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:44,997 INFO L87 Difference]: Start difference. First operand 170 states and 194 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:45,616 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2021-11-07 01:41:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:41:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:45,619 INFO L225 Difference]: With dead ends: 169 [2021-11-07 01:41:45,619 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 01:41:45,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:41:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 01:41:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-07 01:41:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 122 states have (on average 1.5737704918032787) internal successors, (192), 168 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 192 transitions. [2021-11-07 01:41:45,626 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 192 transitions. Word has length 17 [2021-11-07 01:41:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:45,626 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 192 transitions. [2021-11-07 01:41:45,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 192 transitions. [2021-11-07 01:41:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:41:45,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:45,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:45,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:45,835 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1534751880, now seen corresponding path program 1 times [2021-11-07 01:41:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:45,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405018080] [2021-11-07 01:41:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:45,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:45,842 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:45,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:41:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:41:45,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:46,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:41:46,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-07 01:41:46,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 01:41:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 01:41:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:46,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:46,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:46,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405018080] [2021-11-07 01:41:46,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405018080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:46,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:46,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:41:46,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037654298] [2021-11-07 01:41:46,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:41:46,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:41:46,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:41:46,414 INFO L87 Difference]: Start difference. First operand 169 states and 192 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:47,795 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2021-11-07 01:41:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:41:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:47,797 INFO L225 Difference]: With dead ends: 168 [2021-11-07 01:41:47,797 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 01:41:47,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 01:41:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-07 01:41:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 122 states have (on average 1.5573770491803278) internal successors, (190), 167 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2021-11-07 01:41:47,803 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 17 [2021-11-07 01:41:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:47,803 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2021-11-07 01:41:47,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2021-11-07 01:41:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:41:47,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:47,805 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:47,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:48,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:48,011 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1696190880, now seen corresponding path program 1 times [2021-11-07 01:41:48,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:48,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156851840] [2021-11-07 01:41:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:48,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:48,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:48,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:48,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:41:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:41:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:48,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:41:48,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:41:48,229 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 01:41:48,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 01:41:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:48,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 01:41:48,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 01:41:48,383 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-07 01:41:48,389 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 01:41:48,390 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-07 01:41:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:48,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:48,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:48,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156851840] [2021-11-07 01:41:48,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156851840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:48,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:48,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 9 [2021-11-07 01:41:48,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360368507] [2021-11-07 01:41:48,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:41:48,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:41:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:48,667 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:49,429 INFO L93 Difference]: Finished difference Result 281 states and 309 transitions. [2021-11-07 01:41:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:41:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:41:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:49,432 INFO L225 Difference]: With dead ends: 281 [2021-11-07 01:41:49,432 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 01:41:49,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:41:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 01:41:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 178. [2021-11-07 01:41:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 177 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 200 transitions. [2021-11-07 01:41:49,438 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 200 transitions. Word has length 17 [2021-11-07 01:41:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:49,439 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 200 transitions. [2021-11-07 01:41:49,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 200 transitions. [2021-11-07 01:41:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:41:49,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:49,440 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:49,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:49,659 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1696188958, now seen corresponding path program 1 times [2021-11-07 01:41:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:49,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300464253] [2021-11-07 01:41:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:49,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:49,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:49,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:41:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:49,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:49,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:49,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300464253] [2021-11-07 01:41:49,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300464253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:49,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:49,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:49,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422013080] [2021-11-07 01:41:49,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:49,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:49,946 INFO L87 Difference]: Start difference. First operand 178 states and 200 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:50,342 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2021-11-07 01:41:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:41:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:41:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:50,344 INFO L225 Difference]: With dead ends: 218 [2021-11-07 01:41:50,344 INFO L226 Difference]: Without dead ends: 218 [2021-11-07 01:41:50,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-07 01:41:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-11-07 01:41:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 134 states have (on average 1.5223880597014925) internal successors, (204), 179 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2021-11-07 01:41:50,350 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 17 [2021-11-07 01:41:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:50,350 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2021-11-07 01:41:50,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2021-11-07 01:41:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:41:50,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:50,351 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:50,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:41:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:50,563 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1696188959, now seen corresponding path program 1 times [2021-11-07 01:41:50,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:50,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211149209] [2021-11-07 01:41:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:50,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:50,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:50,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:50,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:41:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:50,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:41:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:50,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:51,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 01:41:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:51,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:51,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211149209] [2021-11-07 01:41:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211149209] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:41:51,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:41:51,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-07 01:41:51,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293259326] [2021-11-07 01:41:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:51,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:51,225 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:51,918 INFO L93 Difference]: Finished difference Result 296 states and 329 transitions. [2021-11-07 01:41:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:41:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:41:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:51,921 INFO L225 Difference]: With dead ends: 296 [2021-11-07 01:41:51,921 INFO L226 Difference]: Without dead ends: 296 [2021-11-07 01:41:51,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:41:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-07 01:41:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 183. [2021-11-07 01:41:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 137 states have (on average 1.5255474452554745) internal successors, (209), 182 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 209 transitions. [2021-11-07 01:41:51,927 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 209 transitions. Word has length 17 [2021-11-07 01:41:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:51,927 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 209 transitions. [2021-11-07 01:41:51,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 209 transitions. [2021-11-07 01:41:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:41:51,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:51,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:51,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:52,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:52,129 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:41:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1327705298, now seen corresponding path program 1 times [2021-11-07 01:41:52,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:52,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819250226] [2021-11-07 01:41:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:52,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:52,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:52,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:41:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:41:52,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:52,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:41:52,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:41:52,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 01:41:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:41:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-07 01:41:52,622 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 01:41:52,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-07 01:41:52,637 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 01:41:52,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-07 01:41:52,758 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:41:52,759 INFO L388 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 61 treesize of output 40 [2021-11-07 01:41:52,767 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:41:52,768 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-11-07 01:41:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:52,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:04,328 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset))))) (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (let ((.cse1 (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset))) (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1))))) is different from false [2021-11-07 01:42:04,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-07 01:42:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:04,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:04,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819250226] [2021-11-07 01:42:04,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819250226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:04,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:04,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 01:42:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43084973] [2021-11-07 01:42:04,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:42:04,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:42:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=4, NotChecked=26, Total=240 [2021-11-07 01:42:04,917 INFO L87 Difference]: Start difference. First operand 183 states and 209 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:13,362 INFO L93 Difference]: Finished difference Result 201 states and 228 transitions. [2021-11-07 01:42:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:42:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:42:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:13,366 INFO L225 Difference]: With dead ends: 201 [2021-11-07 01:42:13,366 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 01:42:13,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=4, NotChecked=46, Total=650 [2021-11-07 01:42:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 01:42:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 182. [2021-11-07 01:42:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 137 states have (on average 1.510948905109489) internal successors, (207), 181 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-11-07 01:42:13,372 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 18 [2021-11-07 01:42:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:13,373 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-11-07 01:42:13,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-11-07 01:42:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:42:13,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:13,374 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:13,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:42:13,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,586 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:42:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1327705297, now seen corresponding path program 1 times [2021-11-07 01:42:13,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:13,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702911756] [2021-11-07 01:42:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:13,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:13,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:13,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:42:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:13,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:42:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:42:13,881 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:42:13,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-07 01:42:13,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-07 01:42:14,174 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 01:42:14,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 01:42:14,302 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:42:14,302 INFO L388 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 57 treesize of output 40 [2021-11-07 01:42:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:14,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:20,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:20,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702911756] [2021-11-07 01:42:20,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702911756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:20,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:20,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 01:42:20,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670467363] [2021-11-07 01:42:20,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:42:20,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:20,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:42:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=185, Unknown=3, NotChecked=0, Total=240 [2021-11-07 01:42:20,904 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:26,729 INFO L93 Difference]: Finished difference Result 201 states and 227 transitions. [2021-11-07 01:42:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:42:26,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:42:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:26,732 INFO L225 Difference]: With dead ends: 201 [2021-11-07 01:42:26,732 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 01:42:26,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=171, Invalid=474, Unknown=5, NotChecked=0, Total=650 [2021-11-07 01:42:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 01:42:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 181. [2021-11-07 01:42:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 180 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2021-11-07 01:42:26,738 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 18 [2021-11-07 01:42:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2021-11-07 01:42:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2021-11-07 01:42:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:42:26,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:26,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:26,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:26,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:26,956 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:42:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1042249152, now seen corresponding path program 1 times [2021-11-07 01:42:26,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:26,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994164172] [2021-11-07 01:42:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:26,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:26,958 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:42:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:42:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:27,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:27,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:27,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994164172] [2021-11-07 01:42:27,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994164172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:27,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553095523] [2021-11-07 01:42:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:27,448 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:27,453 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:27,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:42:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:42:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:42:28,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553095523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:28,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:28,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 11 [2021-11-07 01:42:28,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502828822] [2021-11-07 01:42:28,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:42:28,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:42:28,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:28,208 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:29,014 INFO L93 Difference]: Finished difference Result 267 states and 296 transitions. [2021-11-07 01:42:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:42:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:42:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:29,017 INFO L225 Difference]: With dead ends: 267 [2021-11-07 01:42:29,017 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 01:42:29,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:42:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 01:42:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2021-11-07 01:42:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 136 states have (on average 1.4926470588235294) internal successors, (203), 179 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 203 transitions. [2021-11-07 01:42:29,024 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 203 transitions. Word has length 18 [2021-11-07 01:42:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:29,025 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 203 transitions. [2021-11-07 01:42:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 203 transitions. [2021-11-07 01:42:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:42:29,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:29,026 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:29,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:29,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:42:29,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:29,439 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:42:29,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1866350413, now seen corresponding path program 1 times [2021-11-07 01:42:29,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:29,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219770439] [2021-11-07 01:42:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:29,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:29,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:29,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:42:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:29,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:42:29,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:29,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:42:29,921 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:42:29,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-07 01:42:29,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 01:42:30,219 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:42:30,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 34 [2021-11-07 01:42:30,376 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:42:30,377 INFO L388 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 65 treesize of output 40 [2021-11-07 01:42:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:30,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:38,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:38,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219770439] [2021-11-07 01:42:38,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219770439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:38,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:38,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 01:42:38,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955376491] [2021-11-07 01:42:38,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:42:38,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:42:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2021-11-07 01:42:38,473 INFO L87 Difference]: Start difference. First operand 180 states and 203 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:41,130 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2021-11-07 01:42:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:42:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:42:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:41,132 INFO L225 Difference]: With dead ends: 200 [2021-11-07 01:42:41,133 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 01:42:41,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=171, Invalid=478, Unknown=1, NotChecked=0, Total=650 [2021-11-07 01:42:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 01:42:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 179. [2021-11-07 01:42:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 136 states have (on average 1.4852941176470589) internal successors, (202), 178 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 202 transitions. [2021-11-07 01:42:41,140 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 202 transitions. Word has length 20 [2021-11-07 01:42:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:41,140 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 202 transitions. [2021-11-07 01:42:41,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 202 transitions. [2021-11-07 01:42:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:42:41,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:41,142 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:41,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:42:41,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,354 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:42:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:41,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1866350412, now seen corresponding path program 1 times [2021-11-07 01:42:41,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:41,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844070784] [2021-11-07 01:42:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:41,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:41,356 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:41,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:42:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:42:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:41,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:42:41,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:42:41,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:42:41,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 01:42:41,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 01:42:41,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:41,981 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:42:41,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-07 01:42:42,010 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 01:42:42,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-11-07 01:42:42,171 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:42:42,171 INFO L388 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 75 treesize of output 44 [2021-11-07 01:42:42,179 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:42:42,179 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-11-07 01:42:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:42,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:44,471 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32))) (let ((.cse0 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) .cse0))))) (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32))))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1))))) is different from false [2021-11-07 01:42:46,513 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse2))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~n~0.base) .cse2)))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32))) (let ((.cse4 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse4))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) .cse4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) .cse4))))))) is different from false [2021-11-07 01:42:46,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-07 01:42:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:47,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:47,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844070784] [2021-11-07 01:42:47,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844070784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:47,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:47,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 01:42:47,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800902746] [2021-11-07 01:42:47,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:42:47,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:42:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=150, Unknown=2, NotChecked=50, Total=240 [2021-11-07 01:42:47,110 INFO L87 Difference]: Start difference. First operand 179 states and 202 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:55,919 INFO L93 Difference]: Finished difference Result 198 states and 223 transitions. [2021-11-07 01:42:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:42:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:42:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:55,921 INFO L225 Difference]: With dead ends: 198 [2021-11-07 01:42:55,921 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 01:42:55,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=149, Invalid=409, Unknown=2, NotChecked=90, Total=650 [2021-11-07 01:42:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 01:42:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2021-11-07 01:42:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 177 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2021-11-07 01:42:55,926 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 20 [2021-11-07 01:42:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:55,927 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2021-11-07 01:42:55,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2021-11-07 01:42:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:42:55,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:55,928 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:55,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:56,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:56,128 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:42:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1776483090, now seen corresponding path program 1 times [2021-11-07 01:42:56,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:56,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40408989] [2021-11-07 01:42:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:56,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:56,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:56,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:56,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:42:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:42:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:56,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:56,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:56,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:56,658 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 01:42:56,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-07 01:42:56,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:56,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:56,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2021-11-07 01:42:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:56,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 01:42:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:56,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-11-07 01:42:56,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-07 01:42:56,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-07 01:42:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:57,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:57,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:57,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40408989] [2021-11-07 01:42:57,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40408989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:57,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551507604] [2021-11-07 01:42:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:57,514 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:57,515 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:57,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:42:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:42:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:57,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:58,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:58,119 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 01:42:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-07 01:42:58,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:58,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2021-11-07 01:42:58,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:58,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:58,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 33 [2021-11-07 01:42:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:58,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 01:42:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-07 01:42:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-07 01:42:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:58,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:58,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551507604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:58,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642005378] [2021-11-07 01:42:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:58,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:58,624 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:42:58,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:42:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:59,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:42:59,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:59,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:59,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:42:59,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:59,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:59,167 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 01:42:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-07 01:42:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:59,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:59,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2021-11-07 01:42:59,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:59,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:59,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:59,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 33 [2021-11-07 01:42:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 01:42:59,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-07 01:42:59,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-07 01:42:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:59,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:59,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642005378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:59,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:42:59,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 17 [2021-11-07 01:42:59,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947600661] [2021-11-07 01:42:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:42:59,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:42:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:42:59,647 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:01,959 INFO L93 Difference]: Finished difference Result 286 states and 325 transitions. [2021-11-07 01:43:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:43:01,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 01:43:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:01,962 INFO L225 Difference]: With dead ends: 286 [2021-11-07 01:43:01,962 INFO L226 Difference]: Without dead ends: 286 [2021-11-07 01:43:01,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:43:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-07 01:43:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 235. [2021-11-07 01:43:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 193 states have (on average 1.4248704663212435) internal successors, (275), 234 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 275 transitions. [2021-11-07 01:43:01,970 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 275 transitions. Word has length 26 [2021-11-07 01:43:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:01,971 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 275 transitions. [2021-11-07 01:43:01,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 275 transitions. [2021-11-07 01:43:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:43:01,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:01,972 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:01,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:02,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:43:02,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:02,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:02,576 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:43:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1040719994, now seen corresponding path program 1 times [2021-11-07 01:43:02,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:02,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933295457] [2021-11-07 01:43:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:02,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:02,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:02,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:43:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:43:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:03,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:43:03,211 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:43:03,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-07 01:43:03,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 01:43:03,520 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:43:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2021-11-07 01:43:03,826 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 01:43:03,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 49 [2021-11-07 01:43:12,395 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-07 01:43:12,396 INFO L388 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 74 treesize of output 47 [2021-11-07 01:43:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:21,617 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32))))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32)))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:43:23,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse2 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse2))) (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32)))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~n~0.base) .cse2))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32)))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:43:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 795 treesize of output 783 [2021-11-07 01:43:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:29,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:29,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933295457] [2021-11-07 01:43:29,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933295457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:29,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200936404] [2021-11-07 01:43:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:29,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:29,686 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:29,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:43:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:43:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:30,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:43:30,647 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:43:30,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-07 01:43:30,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 01:43:31,158 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:43:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2021-11-07 01:43:37,574 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 01:43:37,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 49 [2021-11-07 01:43:46,144 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:43:46,145 INFO L388 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 64 treesize of output 45 [2021-11-07 01:43:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:48,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:43:50,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32))))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:43:52,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32))))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:43:54,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse2 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse2))) (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32)))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~n~0.base) .cse2))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32)))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32)))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:43:54,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 859 treesize of output 847 [2021-11-07 01:43:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:57,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200936404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:57,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961663816] [2021-11-07 01:43:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:57,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:57,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:57,473 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:43:57,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:43:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:57,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:43:58,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:58,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:43:58,218 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:43:58,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-07 01:43:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 01:43:58,554 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:43:58,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2021-11-07 01:44:02,839 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 01:44:02,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 49 [2021-11-07 01:44:03,187 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:44:03,187 INFO L388 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 64 treesize of output 45 [2021-11-07 01:44:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:03,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:09,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32))))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:44:11,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse2 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse2))) (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32)))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~n~0.base) .cse2))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32)))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32)))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:44:11,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 795 treesize of output 783 [2021-11-07 01:44:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961663816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:16,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:44:16,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 38 [2021-11-07 01:44:16,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826237016] [2021-11-07 01:44:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 01:44:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 01:44:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=741, Unknown=19, NotChecked=520, Total=1482 [2021-11-07 01:44:16,410 INFO L87 Difference]: Start difference. First operand 235 states and 275 transitions. Second operand has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 39 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:54,227 WARN L207 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-11-07 01:45:16,541 WARN L207 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-11-07 01:45:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:53,446 INFO L93 Difference]: Finished difference Result 381 states and 452 transitions. [2021-11-07 01:45:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:45:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 39 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:45:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:53,450 INFO L225 Difference]: With dead ends: 381 [2021-11-07 01:45:53,450 INFO L226 Difference]: Without dead ends: 381 [2021-11-07 01:45:53,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 8 IntricatePredicates, 3 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 117.5s TimeCoverageRelationStatistics Valid=511, Invalid=1462, Unknown=39, NotChecked=744, Total=2756 [2021-11-07 01:45:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-07 01:45:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 269. [2021-11-07 01:45:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 227 states have (on average 1.4361233480176212) internal successors, (326), 268 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 326 transitions. [2021-11-07 01:45:53,460 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 326 transitions. Word has length 32 [2021-11-07 01:45:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:53,460 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 326 transitions. [2021-11-07 01:45:53,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 39 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 326 transitions. [2021-11-07 01:45:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:45:53,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:53,462 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:53,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:53,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:53,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:54,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:54,078 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:45:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1040719993, now seen corresponding path program 1 times [2021-11-07 01:45:54,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:54,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568590328] [2021-11-07 01:45:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:54,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:54,081 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:54,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:45:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:54,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:45:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:54,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:45:55,087 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:45:55,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:45:55,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:45:55,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:45:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 01:45:55,359 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:45:55,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-07 01:45:56,675 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 01:45:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-11-07 01:45:57,021 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 01:45:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 70 [2021-11-07 01:45:57,072 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-07 01:45:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 93 [2021-11-07 01:46:03,592 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-07 01:46:03,592 INFO L388 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 79 treesize of output 46 [2021-11-07 01:46:03,597 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-07 01:46:03,598 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-11-07 01:46:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:03,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:24,220 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (let ((.cse1 (select (select .cse4 c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (.cse2 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|)) (.cse3 (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32)))) (bvule (bvadd (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) .cse3) (_ bv4 32)) (select |c_#length| (select (select (store .cse4 .cse1 (store (select .cse4 .cse1) .cse2 (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) .cse3)))))) (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (let ((.cse5 (select (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32)))) (.cse7 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21.base|) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32))))) (store .cse6 .cse7 (store (select .cse6 .cse7) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))) (bvule .cse5 (bvadd .cse5 (_ bv4 32)))))) is different from false [2021-11-07 01:46:26,419 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse4 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse4))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32)))) (.cse2 (select (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))) c_ULTIMATE.start_main_~n~0.base) .cse4))) (store .cse1 .cse2 (store (select .cse1 .cse2) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32)))))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|ULTIMATE.start_main_#t~mem21.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (let ((.cse11 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse11))) (let ((.cse10 (store |c_#memory_$Pointer$.base| .cse8 (store (select |c_#memory_$Pointer$.base| .cse8) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (let ((.cse6 (select (select .cse10 c_ULTIMATE.start_main_~n~0.base) .cse11)) (.cse7 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|)) (.cse9 (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| .cse8 (store (select |c_#memory_$Pointer$.offset| .cse8) |ULTIMATE.start_main_#t~mem21.offset| (_ bv0 32))))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) .cse9)) (select |c_#length| (select (select (store .cse10 .cse6 (store (select .cse10 .cse6) .cse7 (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) .cse9))))))))) is different from false [2021-11-07 01:46:26,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1082 treesize of output 1034 [2021-11-07 01:46:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-07 01:46:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:53,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:53,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568590328] [2021-11-07 01:46:53,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568590328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:53,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [230659080] [2021-11-07 01:46:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:53,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:53,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:53,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:46:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:54,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:46:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:54,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:46:54,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:46:55,060 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:46:55,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:46:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 01:46:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:55,222 INFO L388 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 23 [2021-11-07 01:46:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:55,591 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 01:46:55,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 52 [2021-11-07 01:46:55,619 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 01:46:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2021-11-07 01:46:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:56,189 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-11-07 01:46:56,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 73 [2021-11-07 01:46:56,242 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 01:46:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 87 [2021-11-07 01:47:02,819 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-07 01:47:02,819 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 40 [2021-11-07 01:47:02,824 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:47:02,825 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 17 [2021-11-07 01:47:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:03,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:05,362 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset) (_ bv0 32))) (forall ((|ULTIMATE.start_main_#t~mem22.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem22.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem22.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem22.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset) (_ bv0 32)))) is different from false [2021-11-07 01:47:54,846 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 01:47:54,846 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2021-11-07 01:47:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:55,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [230659080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:55,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508811965] [2021-11-07 01:47:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:55,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:55,224 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:55,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:47:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:47:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:56,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:47:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:47:56,627 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:47:56,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-07 01:47:56,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:47:56,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 01:47:57,426 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 01:47:57,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-07 01:47:57,453 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-07 01:47:57,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-11-07 01:48:04,158 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 01:48:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 70 [2021-11-07 01:48:04,200 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-07 01:48:04,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 93 [2021-11-07 01:48:11,081 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:48:11,081 INFO L388 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 65 treesize of output 42 [2021-11-07 01:48:11,087 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:48:11,087 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-11-07 01:48:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:11,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1082 treesize of output 1034 [2021-11-07 01:48:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:38,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-07 01:48:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508811965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:38,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:48:38,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17, 12, 12, 12] total 55 [2021-11-07 01:48:38,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442099104] [2021-11-07 01:48:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 01:48:38,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 01:48:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2382, Unknown=21, NotChecked=306, Total=2970 [2021-11-07 01:48:38,746 INFO L87 Difference]: Start difference. First operand 269 states and 326 transitions. Second operand has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:24,247 INFO L93 Difference]: Finished difference Result 542 states and 634 transitions. [2021-11-07 01:52:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 01:52:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:52:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:24,250 INFO L225 Difference]: With dead ends: 542 [2021-11-07 01:52:24,250 INFO L226 Difference]: Without dead ends: 542 [2021-11-07 01:52:24,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3276 ImplicationChecksByTransitivity, 277.1s TimeCoverageRelationStatistics Valid=1851, Invalid=10062, Unknown=89, NotChecked=654, Total=12656 [2021-11-07 01:52:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-07 01:52:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 367. [2021-11-07 01:52:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 325 states have (on average 1.4) internal successors, (455), 366 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 455 transitions. [2021-11-07 01:52:24,263 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 455 transitions. Word has length 32 [2021-11-07 01:52:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:24,263 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 455 transitions. [2021-11-07 01:52:24,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 455 transitions. [2021-11-07 01:52:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:52:24,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:24,265 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:24,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 01:52:24,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:24,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-07 01:52:24,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:24,903 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:52:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 892950918, now seen corresponding path program 1 times [2021-11-07 01:52:24,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:24,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684984029] [2021-11-07 01:52:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:24,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:24,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:24,906 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:52:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:52:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:25,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:52:25,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:52:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:52:25,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:52:25,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-07 01:52:25,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:25,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 01:52:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:25,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 01:52:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:26,177 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 01:52:26,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 54 [2021-11-07 01:52:26,198 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-07 01:52:26,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-11-07 01:52:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:26,482 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-11-07 01:52:26,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 75 [2021-11-07 01:52:26,524 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 01:52:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 81 [2021-11-07 01:52:32,975 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-07 01:52:32,976 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 40 [2021-11-07 01:52:32,982 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:52:32,982 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 17 [2021-11-07 01:52:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:38,708 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem16.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem16.base|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem16.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem16.base|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-11-07 01:52:40,727 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset))) (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-11-07 01:53:05,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc15.base_30| (_ BitVec 32))) (or (and (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |v_ULTIMATE.start_main_#t~malloc15.base_30|)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc15.base_30| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc15.base_30|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((|ULTIMATE.start_main_#t~malloc15.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |ULTIMATE.start_main_#t~malloc15.offset|)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_30| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_30|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15.base_30|))))) is different from false [2021-11-07 01:53:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-07 01:53:05,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:05,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684984029] [2021-11-07 01:53:05,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684984029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:05,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1670837088] [2021-11-07 01:53:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,333 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:05,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:05,334 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:53:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:53:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:06,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:06,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:53:06,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:53:06,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:53:06,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:53:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:06,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 01:53:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:06,796 INFO L388 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 [2021-11-07 01:53:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:06,987 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 01:53:06,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 54 [2021-11-07 01:53:07,019 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-07 01:53:07,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-11-07 01:53:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,261 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-11-07 01:53:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 75 [2021-11-07 01:53:07,318 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 01:53:07,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 81 [2021-11-07 01:53:07,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:53:07,680 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-11-07 01:53:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:07,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:10,046 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_#t~mem17.offset| (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem17.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem17.base|) (bvadd |ULTIMATE.start_main_#t~mem17.offset| (_ bv4 32)) (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))) (forall ((|ULTIMATE.start_main_#t~mem17.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem17.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem17.base|) (bvadd |ULTIMATE.start_main_#t~mem17.offset| (_ bv4 32)) (_ bv0 32))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-11-07 01:53:18,185 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc15.base_32| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15.base_32|)))) (and (forall ((|ULTIMATE.start_main_#t~malloc15.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset |ULTIMATE.start_main_#t~malloc15.offset|)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc15.base_32| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc15.base_32|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) c_ULTIMATE.start_main_~n~0.offset |v_ULTIMATE.start_main_#t~malloc15.base_32|)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_32| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_32|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))))) is different from false [2021-11-07 01:53:20,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc15.base_32| (_ BitVec 32))) (or (and (forall ((|ULTIMATE.start_main_#t~malloc15.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |ULTIMATE.start_main_#t~malloc15.offset|)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc15.base_32| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc15.base_32|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))) (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |v_ULTIMATE.start_main_#t~malloc15.base_32|)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_32| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_32|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15.base_32|)))))) is different from false [2021-11-07 01:53:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-07 01:53:20,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1670837088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:20,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294677481] [2021-11-07 01:53:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:20,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:20,695 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:20,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:53:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:53:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:21,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:21,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:53:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:53:22,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:53:22,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:53:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 01:53:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:22,150 INFO L388 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 [2021-11-07 01:53:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:22,307 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 01:53:22,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 54 [2021-11-07 01:53:22,332 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-07 01:53:22,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-11-07 01:53:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:22,531 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-11-07 01:53:22,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 75 [2021-11-07 01:53:22,576 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-07 01:53:22,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 81 [2021-11-07 01:53:22,910 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-07 01:53:22,911 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 40 [2021-11-07 01:53:22,918 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:53:22,918 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 17 [2021-11-07 01:53:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:22,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-07 01:53:41,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294677481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:41,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:53:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14, 12, 14, 12] total 26 [2021-11-07 01:53:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837002730] [2021-11-07 01:53:41,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:53:41,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:53:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=307, Unknown=15, NotChecked=246, Total=650 [2021-11-07 01:53:41,876 INFO L87 Difference]: Start difference. First operand 367 states and 455 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:44,057 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32)))) (and (= c_ULTIMATE.start_main_~root~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base) .cse0) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~root~0.base))) (_ bv1 1))) (forall ((|v_ULTIMATE.start_main_#t~malloc15.base_30| (_ BitVec 32))) (or (and (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |v_ULTIMATE.start_main_#t~malloc15.base_30|)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_30| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc15.base_30|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((|ULTIMATE.start_main_#t~malloc15.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |ULTIMATE.start_main_#t~malloc15.offset|)))) (store .cse2 |v_ULTIMATE.start_main_#t~malloc15.base_30| (store (select .cse2 |v_ULTIMATE.start_main_#t~malloc15.base_30|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15.base_30|))))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base) .cse0) (_ bv0 32)) (forall ((|v_ULTIMATE.start_main_#t~malloc15.base_32| (_ BitVec 32))) (or (and (forall ((|ULTIMATE.start_main_#t~malloc15.offset| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |ULTIMATE.start_main_#t~malloc15.offset|)))) (store .cse3 |v_ULTIMATE.start_main_#t~malloc15.base_32| (store (select .cse3 |v_ULTIMATE.start_main_#t~malloc15.base_32|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))))) (forall ((|ULTIMATE.start_main_#t~mem16.offset| (_ BitVec 32))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~root~0.base) c_ULTIMATE.start_main_~root~0.offset |v_ULTIMATE.start_main_#t~malloc15.base_32|)))) (store .cse4 |v_ULTIMATE.start_main_#t~malloc15.base_32| (store (select .cse4 |v_ULTIMATE.start_main_#t~malloc15.base_32|) |ULTIMATE.start_main_#t~mem16.offset| (_ bv0 32)))) c_ULTIMATE.start_main_~root~0.base) (bvadd c_ULTIMATE.start_main_~root~0.offset (_ bv4 32))) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15.base_32|)))))))) is different from false [2021-11-07 01:54:42,128 WARN L207 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-11-07 01:55:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:06,726 INFO L93 Difference]: Finished difference Result 424 states and 508 transitions. [2021-11-07 01:55:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:55:06,727 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:55:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:06,729 INFO L225 Difference]: With dead ends: 424 [2021-11-07 01:55:06,729 INFO L226 Difference]: Without dead ends: 424 [2021-11-07 01:55:06,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 130.3s TimeCoverageRelationStatistics Valid=299, Invalid=892, Unknown=27, NotChecked=504, Total=1722 [2021-11-07 01:55:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-07 01:55:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-11-07 01:55:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 307 states have (on average 1.3843648208469055) internal successors, (425), 348 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 425 transitions. [2021-11-07 01:55:06,740 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 425 transitions. Word has length 32 [2021-11-07 01:55:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:06,740 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 425 transitions. [2021-11-07 01:55:06,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 425 transitions. [2021-11-07 01:55:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:55:06,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:06,742 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:06,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 01:55:06,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:07,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:07,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:07,360 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 73 more)] === [2021-11-07 01:55:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2089686132, now seen corresponding path program 1 times [2021-11-07 01:55:07,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:07,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128998580] [2021-11-07 01:55:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:07,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:07,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:07,361 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:07,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f5bef7-89ea-4841-abe3-94ccbad4c313/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:55:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:55:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:08,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:55:08,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:55:08,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:55:08,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:55:08,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 01:55:09,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:09,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:09,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2021-11-07 01:55:09,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:09,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:09,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-11-07 01:55:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:09,285 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-07 01:55:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 52