./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 098cac8041f427989b0fcb649de06793770da06a ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 098cac8041f427989b0fcb649de06793770da06a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:43:16,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:43:16,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:43:16,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:43:16,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:43:16,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:43:16,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:43:16,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:43:16,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:43:16,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:43:16,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:43:16,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:43:16,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:43:16,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:43:16,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:43:16,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:43:16,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:43:16,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:43:16,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:43:16,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:43:16,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:43:16,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:43:16,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:43:16,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:43:16,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:43:16,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:43:16,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:43:16,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:43:16,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:43:16,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:43:16,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:43:16,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:43:16,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:43:16,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:43:16,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:43:16,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:43:16,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:43:16,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:43:16,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:43:16,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:43:16,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:43:16,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 04:43:16,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:43:16,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:43:16,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:43:16,386 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:43:16,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:43:16,386 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:43:16,386 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:43:16,387 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:43:16,387 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:43:16,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 04:43:16,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 04:43:16,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:43:16,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:43:16,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:43:16,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:43:16,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:43:16,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:43:16,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:43:16,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:43:16,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:43:16,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:43:16,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:43:16,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:43:16,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:43:16,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:43:16,391 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 098cac8041f427989b0fcb649de06793770da06a [2020-12-09 04:43:16,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:43:16,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:43:16,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:43:16,582 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:43:16,583 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:43:16,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2020-12-09 04:43:16,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/d0e997b53/51c87a719b30426b98f0065194a38d76/FLAGdaecafc90 [2020-12-09 04:43:17,064 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:43:17,065 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2020-12-09 04:43:17,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/d0e997b53/51c87a719b30426b98f0065194a38d76/FLAGdaecafc90 [2020-12-09 04:43:17,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/d0e997b53/51c87a719b30426b98f0065194a38d76 [2020-12-09 04:43:17,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:43:17,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:43:17,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:43:17,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:43:17,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:43:17,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:43:17" (1/1) ... [2020-12-09 04:43:17,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2febc884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:17, skipping insertion in model container [2020-12-09 04:43:17,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:43:17" (1/1) ... [2020-12-09 04:43:17,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:43:17,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:43:17,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:43:17,375 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2020-12-09 04:43:17,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28cc0226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:17, skipping insertion in model container [2020-12-09 04:43:17,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:43:17,376 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-12-09 04:43:17,378 INFO L168 Benchmark]: Toolchain (without parser) took 286.68 ms. Allocated memory is still 100.7 MB. Free memory was 72.0 MB in the beginning and 73.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:17,378 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 100.7 MB. Free memory is still 65.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:43:17,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.85 ms. Allocated memory is still 100.7 MB. Free memory was 72.0 MB in the beginning and 74.0 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:17,380 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 100.7 MB. Free memory is still 65.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.85 ms. Allocated memory is still 100.7 MB. Free memory was 72.0 MB in the beginning and 74.0 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:43:18,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:43:18,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:43:18,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:43:18,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:43:18,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:43:18,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:43:18,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:43:18,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:43:18,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:43:18,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:43:18,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:43:18,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:43:18,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:43:18,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:43:18,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:43:18,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:43:18,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:43:18,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:43:18,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:43:18,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:43:18,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:43:18,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:43:18,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:43:18,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:43:18,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:43:18,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:43:18,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:43:18,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:43:18,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:43:18,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:43:18,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:43:18,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:43:18,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:43:18,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:43:18,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:43:18,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:43:18,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:43:18,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:43:18,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:43:18,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:43:18,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 04:43:18,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:43:18,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:43:18,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:43:18,858 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:43:18,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:43:18,858 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:43:18,858 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:43:18,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:43:18,859 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:43:18,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 04:43:18,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 04:43:18,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:43:18,860 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:43:18,860 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 04:43:18,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:43:18,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:43:18,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:43:18,861 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 04:43:18,861 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 04:43:18,861 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 04:43:18,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:43:18,862 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:43:18,862 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:43:18,862 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:43:18,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:43:18,862 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:43:18,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:43:18,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:43:18,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:43:18,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:43:18,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:43:18,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:43:18,863 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:43:18,863 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:43:18,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:43:18,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:43:18,864 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 098cac8041f427989b0fcb649de06793770da06a [2020-12-09 04:43:19,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:43:19,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:43:19,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:43:19,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:43:19,124 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:43:19,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2020-12-09 04:43:19,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/58691cb62/90a366bd5d7e46b28c9f3f66f0aba7cf/FLAG747de2421 [2020-12-09 04:43:19,525 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:43:19,525 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/sv-benchmarks/c/ldv-memsafety/memleaks_test6_2.i [2020-12-09 04:43:19,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/58691cb62/90a366bd5d7e46b28c9f3f66f0aba7cf/FLAG747de2421 [2020-12-09 04:43:19,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/data/58691cb62/90a366bd5d7e46b28c9f3f66f0aba7cf [2020-12-09 04:43:19,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:43:19,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:43:19,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:43:19,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:43:19,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:43:19,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:43:19" (1/1) ... [2020-12-09 04:43:19,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7127156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:19, skipping insertion in model container [2020-12-09 04:43:19,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:43:19" (1/1) ... [2020-12-09 04:43:19,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:43:19,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:43:20,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:43:20,211 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-12-09 04:43:20,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:43:20,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:43:20,275 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:43:20,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:43:20,384 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:43:20,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20 WrapperNode [2020-12-09 04:43:20,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:43:20,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:43:20,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:43:20,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:43:20,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:43:20,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:43:20,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:43:20,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:43:20,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... [2020-12-09 04:43:20,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:43:20,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:43:20,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:43:20,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:43:20,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 04:43:20,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:43:20,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:43:20,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:43:20,787 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-09 04:43:20,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:43:20 BoogieIcfgContainer [2020-12-09 04:43:20,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:43:20,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:43:20,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:43:20,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:43:20,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:43:19" (1/3) ... [2020-12-09 04:43:20,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9385ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:43:20, skipping insertion in model container [2020-12-09 04:43:20,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:43:20" (2/3) ... [2020-12-09 04:43:20,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9385ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:43:20, skipping insertion in model container [2020-12-09 04:43:20,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:43:20" (3/3) ... [2020-12-09 04:43:20,797 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test6_2.i [2020-12-09 04:43:20,810 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:43:20,813 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-12-09 04:43:20,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-12-09 04:43:20,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:43:20,840 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 04:43:20,840 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:43:20,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:43:20,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:43:20,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:43:20,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:43:20,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:43:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-09 04:43:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:43:20,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:20,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:20,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 119413611, now seen corresponding path program 1 times [2020-12-09 04:43:20,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:20,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671035368] [2020-12-09 04:43:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:20,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:43:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:20,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:20,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671035368] [2020-12-09 04:43:20,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:20,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:43:20,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388514975] [2020-12-09 04:43:20,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:43:21,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:43:21,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:43:21,011 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-12-09 04:43:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:21,081 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-12-09 04:43:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:43:21,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 04:43:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:21,089 INFO L225 Difference]: With dead ends: 81 [2020-12-09 04:43:21,089 INFO L226 Difference]: Without dead ends: 77 [2020-12-09 04:43:21,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-09 04:43:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 42. [2020-12-09 04:43:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 04:43:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 04:43:21,116 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2020-12-09 04:43:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:21,117 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 04:43:21,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:43:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 04:43:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:43:21,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:21,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:21,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:43:21,320 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:21,323 INFO L82 PathProgramCache]: Analyzing trace with hash 119443421, now seen corresponding path program 1 times [2020-12-09 04:43:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:21,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943395917] [2020-12-09 04:43:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:43:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:21,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943395917] [2020-12-09 04:43:21,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:21,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:43:21,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670155608] [2020-12-09 04:43:21,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:43:21,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:43:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:43:21,530 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2020-12-09 04:43:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:21,553 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-09 04:43:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:43:21,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 04:43:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:21,554 INFO L225 Difference]: With dead ends: 40 [2020-12-09 04:43:21,555 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 04:43:21,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 04:43:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 04:43:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 04:43:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-09 04:43:21,560 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 8 [2020-12-09 04:43:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:21,561 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-09 04:43:21,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:43:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-09 04:43:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:43:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:21,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:21,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:43:21,767 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash 176671913, now seen corresponding path program 1 times [2020-12-09 04:43:21,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:21,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983796940] [2020-12-09 04:43:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:43:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:21,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:21,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983796940] [2020-12-09 04:43:21,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:21,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 04:43:21,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280710164] [2020-12-09 04:43:21,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:43:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:43:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:21,866 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-12-09 04:43:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:21,901 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-09 04:43:21,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:43:21,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 04:43:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:21,902 INFO L225 Difference]: With dead ends: 47 [2020-12-09 04:43:21,902 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 04:43:21,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:43:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 04:43:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-12-09 04:43:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 04:43:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 04:43:21,906 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2020-12-09 04:43:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:21,906 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 04:43:21,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:43:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 04:43:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:43:21,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:21,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:22,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 04:43:22,109 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 176672298, now seen corresponding path program 1 times [2020-12-09 04:43:22,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:22,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116844658] [2020-12-09 04:43:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:43:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:22,265 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 04:43:22,266 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2020-12-09 04:43:22,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:22,291 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-12-09 04:43:22,296 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:22,298 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:22,298 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:25 [2020-12-09 04:43:22,301 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:22,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116844658] [2020-12-09 04:43:22,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:22,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 04:43:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045804172] [2020-12-09 04:43:22,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:43:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:43:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:43:22,321 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 3 states. [2020-12-09 04:43:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:22,361 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-09 04:43:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:43:22,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 04:43:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:22,362 INFO L225 Difference]: With dead ends: 44 [2020-12-09 04:43:22,362 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 04:43:22,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:43:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 04:43:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-09 04:43:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 04:43:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-09 04:43:22,366 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2020-12-09 04:43:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:22,366 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-09 04:43:22,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:43:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-09 04:43:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:43:22,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:22,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:22,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 04:43:22,569 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash 176672299, now seen corresponding path program 1 times [2020-12-09 04:43:22,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:22,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287750163] [2020-12-09 04:43:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:43:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:22,701 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:22,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 04:43:22,705 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:22,730 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 04:43:22,732 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:22,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:11 [2020-12-09 04:43:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:22,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:22,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287750163] [2020-12-09 04:43:22,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:22,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 04:43:22,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394889129] [2020-12-09 04:43:22,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:43:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:22,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:43:22,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:43:22,752 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 3 states. [2020-12-09 04:43:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:22,815 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-12-09 04:43:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:43:22,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 04:43:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:22,817 INFO L225 Difference]: With dead ends: 75 [2020-12-09 04:43:22,817 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 04:43:22,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:43:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 04:43:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-12-09 04:43:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-09 04:43:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2020-12-09 04:43:22,824 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 8 [2020-12-09 04:43:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:22,824 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2020-12-09 04:43:22,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:43:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2020-12-09 04:43:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 04:43:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:22,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:23,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 04:43:23,027 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash -592221173, now seen corresponding path program 1 times [2020-12-09 04:43:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:23,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805461728] [2020-12-09 04:43:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:23,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 04:43:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:23,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805461728] [2020-12-09 04:43:23,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:23,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:43:23,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408890463] [2020-12-09 04:43:23,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:43:23,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:23,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:43:23,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:23,162 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 5 states. [2020-12-09 04:43:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:23,249 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-12-09 04:43:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:43:23,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 04:43:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:23,250 INFO L225 Difference]: With dead ends: 73 [2020-12-09 04:43:23,250 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 04:43:23,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:43:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 04:43:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-12-09 04:43:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-09 04:43:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-12-09 04:43:23,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 9 [2020-12-09 04:43:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:23,254 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-12-09 04:43:23,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:43:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-12-09 04:43:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 04:43:23,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:23,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:23,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 04:43:23,457 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:23,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1181873979, now seen corresponding path program 1 times [2020-12-09 04:43:23,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:23,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557884005] [2020-12-09 04:43:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:43:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:23,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:23,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557884005] [2020-12-09 04:43:23,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:43:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188229368] [2020-12-09 04:43:23,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:43:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:43:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:43:23,556 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 3 states. [2020-12-09 04:43:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:23,597 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-09 04:43:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:43:23,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 04:43:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:23,598 INFO L225 Difference]: With dead ends: 66 [2020-12-09 04:43:23,598 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 04:43:23,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:43:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 04:43:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-12-09 04:43:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 04:43:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-09 04:43:23,602 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 9 [2020-12-09 04:43:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:23,602 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-09 04:43:23,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:43:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-09 04:43:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 04:43:23,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:23,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:23,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 04:43:23,805 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1182786189, now seen corresponding path program 1 times [2020-12-09 04:43:23,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:23,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609457867] [2020-12-09 04:43:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:43:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:23,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:23,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609457867] [2020-12-09 04:43:23,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:23,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:43:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366041953] [2020-12-09 04:43:23,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:43:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:43:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:43:23,922 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 4 states. [2020-12-09 04:43:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:23,960 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-09 04:43:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:43:23,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 04:43:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:23,961 INFO L225 Difference]: With dead ends: 38 [2020-12-09 04:43:23,961 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 04:43:23,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 04:43:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-09 04:43:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 04:43:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-09 04:43:23,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 9 [2020-12-09 04:43:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:23,964 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-09 04:43:23,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:43:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-09 04:43:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:43:23,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:23,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:24,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 04:43:24,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1178987105, now seen corresponding path program 1 times [2020-12-09 04:43:24,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:24,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970737429] [2020-12-09 04:43:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:24,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:43:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:24,234 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 04:43:24,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:24,237 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:24,237 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:24,237 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 04:43:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:24,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:24,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970737429] [2020-12-09 04:43:24,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:24,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:43:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535565931] [2020-12-09 04:43:24,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:43:24,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:24,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:43:24,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:43:24,250 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-12-09 04:43:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:24,297 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-09 04:43:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:43:24,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 04:43:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:24,298 INFO L225 Difference]: With dead ends: 34 [2020-12-09 04:43:24,298 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 04:43:24,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 04:43:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 04:43:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 04:43:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-09 04:43:24,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 10 [2020-12-09 04:43:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:24,300 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-09 04:43:24,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:43:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-09 04:43:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:43:24,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:24,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:24,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 04:43:24,502 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1178944307, now seen corresponding path program 1 times [2020-12-09 04:43:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:24,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498154391] [2020-12-09 04:43:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:43:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:24,591 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 04:43:24,591 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2020-12-09 04:43:24,593 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:24,611 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-12-09 04:43:24,612 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:24,613 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:24,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:25 [2020-12-09 04:43:24,615 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:24,644 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:24,645 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2020-12-09 04:43:24,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:24,659 INFO L625 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2020-12-09 04:43:24,660 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:24,660 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2020-12-09 04:43:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:24,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:24,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498154391] [2020-12-09 04:43:24,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:24,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:43:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896779627] [2020-12-09 04:43:24,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:43:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:43:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:43:24,672 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 4 states. [2020-12-09 04:43:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:24,724 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 04:43:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:43:24,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 04:43:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:24,725 INFO L225 Difference]: With dead ends: 33 [2020-12-09 04:43:24,725 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 04:43:24,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 04:43:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 04:43:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 04:43:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-09 04:43:24,727 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 10 [2020-12-09 04:43:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:24,728 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-09 04:43:24,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:43:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-09 04:43:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:43:24,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:24,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:24,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 04:43:24,931 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1178944306, now seen corresponding path program 1 times [2020-12-09 04:43:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:24,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632273609] [2020-12-09 04:43:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:25,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 04:43:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:25,068 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:25,068 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 04:43:25,070 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,088 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 04:43:25,089 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,090 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:11 [2020-12-09 04:43:25,132 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:25,132 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2020-12-09 04:43:25,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,153 INFO L625 ElimStorePlain]: treesize reduction 14, result has 53.3 percent of original size [2020-12-09 04:43:25,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:25,155 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:16 [2020-12-09 04:43:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:25,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:25,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632273609] [2020-12-09 04:43:25,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:25,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:43:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748772196] [2020-12-09 04:43:25,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:43:25,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:43:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:25,185 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 5 states. [2020-12-09 04:43:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:25,230 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-09 04:43:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:43:25,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 04:43:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:25,231 INFO L225 Difference]: With dead ends: 31 [2020-12-09 04:43:25,231 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 04:43:25,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:43:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 04:43:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 04:43:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:43:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-09 04:43:25,234 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 10 [2020-12-09 04:43:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:25,234 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-09 04:43:25,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:43:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-09 04:43:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 04:43:25,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:25,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:25,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 04:43:25,436 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:25,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1037777200, now seen corresponding path program 1 times [2020-12-09 04:43:25,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:25,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838840823] [2020-12-09 04:43:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:43:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:25,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:25,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838840823] [2020-12-09 04:43:25,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:25,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 04:43:25,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17281046] [2020-12-09 04:43:25,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:43:25,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:25,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:43:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:43:25,548 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2020-12-09 04:43:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:25,577 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-09 04:43:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:43:25,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 04:43:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:25,577 INFO L225 Difference]: With dead ends: 37 [2020-12-09 04:43:25,577 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 04:43:25,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:43:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 04:43:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-12-09 04:43:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 04:43:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-09 04:43:25,579 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 13 [2020-12-09 04:43:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:25,580 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-09 04:43:25,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:43:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-09 04:43:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 04:43:25,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:25,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:25,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 04:43:25,781 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1037777585, now seen corresponding path program 1 times [2020-12-09 04:43:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:25,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657428054] [2020-12-09 04:43:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:43:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:25,889 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 04:43:25,890 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2020-12-09 04:43:25,891 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,908 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-12-09 04:43:25,909 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:25,910 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:25,910 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:25 [2020-12-09 04:43:25,911 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:25,937 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:25,937 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-09 04:43:25,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,944 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:25,945 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,945 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:19 [2020-12-09 04:43:25,980 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2020-12-09 04:43:25,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:25,990 INFO L625 ElimStorePlain]: treesize reduction 4, result has 76.5 percent of original size [2020-12-09 04:43:25,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:25,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2020-12-09 04:43:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:26,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:26,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657428054] [2020-12-09 04:43:26,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:26,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:43:26,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112289413] [2020-12-09 04:43:26,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:43:26,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:43:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:43:26,009 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2020-12-09 04:43:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:32,141 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-09 04:43:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:43:32,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 04:43:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:32,142 INFO L225 Difference]: With dead ends: 36 [2020-12-09 04:43:32,142 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 04:43:32,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:43:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 04:43:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-09 04:43:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 04:43:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-09 04:43:32,144 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 13 [2020-12-09 04:43:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:32,144 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-09 04:43:32,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:43:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-09 04:43:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 04:43:32,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:32,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:32,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 04:43:32,346 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2106334100, now seen corresponding path program 1 times [2020-12-09 04:43:32,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:32,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488700300] [2020-12-09 04:43:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:43:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:32,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:32,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488700300] [2020-12-09 04:43:32,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:32,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 04:43:32,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126924779] [2020-12-09 04:43:32,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:43:32,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:43:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:43:32,446 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-12-09 04:43:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:32,553 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-12-09 04:43:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:43:32,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 04:43:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:32,554 INFO L225 Difference]: With dead ends: 35 [2020-12-09 04:43:32,554 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 04:43:32,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:43:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 04:43:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 04:43:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 04:43:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 27 transitions. [2020-12-09 04:43:32,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 27 transitions. Word has length 14 [2020-12-09 04:43:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:32,555 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 27 transitions. [2020-12-09 04:43:32,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:43:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 27 transitions. [2020-12-09 04:43:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 04:43:32,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:32,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:32,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 04:43:32,757 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2072222585, now seen corresponding path program 1 times [2020-12-09 04:43:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:32,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699758674] [2020-12-09 04:43:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:32,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 04:43:32,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:32,954 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 04:43:32,955 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2020-12-09 04:43:32,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:32,978 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-12-09 04:43:32,979 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:32,980 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:32,981 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:25 [2020-12-09 04:43:32,982 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 04:43:33,024 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:33,025 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-09 04:43:33,027 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:33,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:33,037 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:33,037 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:22 [2020-12-09 04:43:33,106 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2020-12-09 04:43:33,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:33,117 INFO L625 ElimStorePlain]: treesize reduction 4, result has 76.5 percent of original size [2020-12-09 04:43:33,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:43:33,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2020-12-09 04:43:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:33,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:33,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699758674] [2020-12-09 04:43:33,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:33,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 04:43:33,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071142621] [2020-12-09 04:43:33,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 04:43:33,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:33,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 04:43:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:43:33,155 INFO L87 Difference]: Start difference. First operand 28 states and 27 transitions. Second operand 9 states. [2020-12-09 04:43:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:39,318 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2020-12-09 04:43:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 04:43:39,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-09 04:43:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:39,319 INFO L225 Difference]: With dead ends: 27 [2020-12-09 04:43:39,319 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 04:43:39,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:43:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 04:43:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 04:43:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 04:43:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2020-12-09 04:43:39,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 16 [2020-12-09 04:43:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:39,320 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2020-12-09 04:43:39,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 04:43:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2020-12-09 04:43:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 04:43:39,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:39,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:39,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 04:43:39,522 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2072222586, now seen corresponding path program 1 times [2020-12-09 04:43:39,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:39,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306460524] [2020-12-09 04:43:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:39,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:43:39,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:39,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306460524] [2020-12-09 04:43:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:43:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384737789] [2020-12-09 04:43:39,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:43:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:43:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:43:39,669 INFO L87 Difference]: Start difference. First operand 27 states and 26 transitions. Second operand 6 states. [2020-12-09 04:43:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:39,727 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2020-12-09 04:43:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:43:39,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 04:43:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:39,728 INFO L225 Difference]: With dead ends: 26 [2020-12-09 04:43:39,728 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 04:43:39,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:43:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 04:43:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 04:43:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 04:43:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2020-12-09 04:43:39,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 16 [2020-12-09 04:43:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:39,730 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2020-12-09 04:43:39,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:43:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2020-12-09 04:43:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 04:43:39,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:39,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:39,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 04:43:39,932 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash -185609283, now seen corresponding path program 1 times [2020-12-09 04:43:39,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:39,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890834722] [2020-12-09 04:43:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 04:43:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:40,130 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 04:43:40,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,133 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:40,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 04:43:40,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 04:43:40,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:40,159 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-09 04:43:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:40,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:40,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890834722] [2020-12-09 04:43:40,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:40,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 04:43:40,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916204229] [2020-12-09 04:43:40,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:43:40,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:43:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:43:40,168 INFO L87 Difference]: Start difference. First operand 26 states and 25 transitions. Second operand 8 states. [2020-12-09 04:43:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:40,289 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2020-12-09 04:43:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 04:43:40,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-09 04:43:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:40,290 INFO L225 Difference]: With dead ends: 25 [2020-12-09 04:43:40,290 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 04:43:40,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-09 04:43:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 04:43:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 04:43:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:43:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2020-12-09 04:43:40,292 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 17 [2020-12-09 04:43:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:40,292 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2020-12-09 04:43:40,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:43:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2020-12-09 04:43:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 04:43:40,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:40,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:40,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-12-09 04:43:40,494 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1458920391, now seen corresponding path program 1 times [2020-12-09 04:43:40,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:40,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018641251] [2020-12-09 04:43:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 04:43:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:40,639 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 04:43:40,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,647 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:40,648 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-09 04:43:40,706 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-09 04:43:40,706 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,711 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:43:40,712 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:43:40,712 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:8 [2020-12-09 04:43:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:43:40,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:43:40,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018641251] [2020-12-09 04:43:40,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:43:40,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 04:43:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717531880] [2020-12-09 04:43:40,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 04:43:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:43:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 04:43:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-09 04:43:40,735 INFO L87 Difference]: Start difference. First operand 25 states and 24 transitions. Second operand 10 states. [2020-12-09 04:43:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:43:40,991 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2020-12-09 04:43:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:43:40,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-09 04:43:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:43:40,992 INFO L225 Difference]: With dead ends: 24 [2020-12-09 04:43:40,992 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 04:43:40,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-09 04:43:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 04:43:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 04:43:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 04:43:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-12-09 04:43:40,994 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 18 [2020-12-09 04:43:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:43:40,994 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-12-09 04:43:40,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 04:43:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-12-09 04:43:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 04:43:40,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:43:40,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:43:41,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-12-09 04:43:41,196 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:43:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:43:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2018108223, now seen corresponding path program 1 times [2020-12-09 04:43:41,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:43:41,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255064554] [2020-12-09 04:43:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-12-09 04:43:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:43:41,272 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:43:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:43:41,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:43:41,325 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 04:43:41,326 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:43:41,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3 [2020-12-09 04:43:41,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:43:41 BoogieIcfgContainer [2020-12-09 04:43:41,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:43:41,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:43:41,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:43:41,556 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:43:41,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:43:20" (3/4) ... [2020-12-09 04:43:41,558 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:43:41,585 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_79abbe39-1f21-40bb-8f1f-98f8ff82f29b/bin/utaipan/witness.graphml [2020-12-09 04:43:41,585 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:43:41,586 INFO L168 Benchmark]: Toolchain (without parser) took 21675.07 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 40.2 MB in the beginning and 58.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,586 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 46.1 MB. Free memory was 29.2 MB in the beginning and 29.2 MB in the end (delta: 78.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:43:41,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 472.65 ms. Allocated memory is still 56.6 MB. Free memory was 40.0 MB in the beginning and 36.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,586 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.56 ms. Allocated memory is still 56.6 MB. Free memory was 36.8 MB in the beginning and 34.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,587 INFO L168 Benchmark]: Boogie Preprocessor took 20.61 ms. Allocated memory is still 56.6 MB. Free memory was 34.5 MB in the beginning and 32.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,587 INFO L168 Benchmark]: RCFGBuilder took 345.17 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 37.9 MB in the end (delta: -5.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,587 INFO L168 Benchmark]: TraceAbstraction took 20765.30 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 37.2 MB in the beginning and 61.5 MB in the end (delta: -24.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,588 INFO L168 Benchmark]: Witness Printer took 28.99 ms. Allocated memory is still 83.9 MB. Free memory was 61.5 MB in the beginning and 58.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:43:41,589 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 46.1 MB. Free memory was 29.2 MB in the beginning and 29.2 MB in the end (delta: 78.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 472.65 ms. Allocated memory is still 56.6 MB. Free memory was 40.0 MB in the beginning and 36.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.56 ms. Allocated memory is still 56.6 MB. Free memory was 36.8 MB in the beginning and 34.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.61 ms. Allocated memory is still 56.6 MB. Free memory was 34.5 MB in the beginning and 32.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 345.17 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 37.9 MB in the end (delta: -5.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20765.30 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 37.2 MB in the beginning and 61.5 MB in the end (delta: -24.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. * Witness Printer took 28.99 ms. Allocated memory is still 83.9 MB. Free memory was 61.5 MB in the beginning and 58.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 782]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L784] struct A a6; VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L764] int ret = - -3; [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L765] int *p = (int *)ldv_malloc(sizeof(int)); [L766] COND FALSE !(p==0) [L758] return __VERIFIER_nondet_int(); [L768] ret = f6() [L769] COND FALSE !(ret<0) [L761] return __VERIFIER_nondet_int(); [L771] ret = g6() [L772] COND FALSE !(ret<0) VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L774] a->p = p VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L775] free(p) VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L775] free(p) VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L775] free(p) [L776] return 0; VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L786] int ret = probe3_6(&a6); [L787] COND TRUE ret==0 [L782] EXPR a->p VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L782] free(a->p) VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L782] free(a->p) VAL [a6={7:0}, ldv_global_msg_list={3:0}] [L782] free(a->p) VAL [a6={7:0}, ldv_global_msg_list={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.6s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 13.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 551 SDtfs, 757 SDslu, 611 SDs, 0 SdLazy, 526 SolverSat, 43 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 12.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 18 MinimizatonAttempts, 77 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 223 NumberOfCodeBlocks, 223 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 186 ConstructedInterpolants, 10 QuantifiedInterpolants, 19468 SizeOfPredicates, 80 NumberOfNonLiveVariables, 939 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...