./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8 --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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8 --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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:11:54,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:11:54,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:11:54,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:11:54,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:11:54,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:11:54,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:11:54,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:11:54,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:11:54,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:11:54,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:11:54,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:11:54,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:11:54,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:11:54,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:11:54,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:11:54,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:11:54,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:11:54,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:11:54,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:11:54,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:11:54,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:11:54,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:11:54,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:11:54,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:11:54,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:11:54,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:11:54,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:11:54,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:11:54,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:11:54,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:11:54,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:11:54,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:11:54,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:11:54,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:11:54,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:11:54,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:11:54,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:11:54,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:11:54,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:11:54,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:11:54,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 08:11:54,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:11:54,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:11:54,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:11:54,446 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:11:54,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:11:54,446 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:11:54,446 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:11:54,447 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:11:54,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:11:54,447 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:11:54,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:11:54,448 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:11:54,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:11:54,449 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:11:54,449 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:11:54,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:11:54,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:11:54,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:11:54,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:11:54,450 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:11:54,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:11:54,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:11:54,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:11:54,451 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:11:54,451 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:11:54,451 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:11:54,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:11:54,453 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:11:54,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:11:54,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:11:54,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:11:54,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:11:54,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:11:54,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:11:54,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:11:54,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:11:54,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:11:54,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:11:54,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:11:54,455 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2021-10-13 08:11:54,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:11:54,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:11:54,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:11:54,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:11:54,760 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:11:54,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-10-13 08:11:54,852 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/5e5d6ab65/ece928f346a94ec0880a06b5f0db5441/FLAGb01e2bc7f [2021-10-13 08:11:55,286 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:11:55,286 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-10-13 08:11:55,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/5e5d6ab65/ece928f346a94ec0880a06b5f0db5441/FLAGb01e2bc7f [2021-10-13 08:11:55,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/5e5d6ab65/ece928f346a94ec0880a06b5f0db5441 [2021-10-13 08:11:55,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:11:55,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:11:55,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:11:55,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:11:55,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:11:55,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:55,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ef5ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55, skipping insertion in model container [2021-10-13 08:11:55,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:55,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:11:55,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:11:55,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:11:55,917 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:11:55,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:11:55,943 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:11:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55 WrapperNode [2021-10-13 08:11:55,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:11:55,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:11:55,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:11:55,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:11:55,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:55,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:55,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:11:55,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:11:55,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:11:55,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:11:56,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:11:56,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:11:56,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:11:56,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:11:56,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (1/1) ... [2021-10-13 08:11:56,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:11:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:11:56,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:11:56,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:11:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:11:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:11:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:11:56,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:11:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:11:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:11:56,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:11:56,489 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:11:56,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:56 BoogieIcfgContainer [2021-10-13 08:11:56,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:11:56,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:11:56,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:11:56,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:11:56,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:55" (1/3) ... [2021-10-13 08:11:56,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec813f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:56, skipping insertion in model container [2021-10-13 08:11:56,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:55" (2/3) ... [2021-10-13 08:11:56,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec813f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:56, skipping insertion in model container [2021-10-13 08:11:56,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:56" (3/3) ... [2021-10-13 08:11:56,500 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2021-10-13 08:11:56,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:11:56,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-13 08:11:56,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:11:56,576 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:11:56,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-13 08:11:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 2.125) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:11:56,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:56,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:11:56,601 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash 78481, now seen corresponding path program 1 times [2021-10-13 08:11:56,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:56,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81686672] [2021-10-13 08:11:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:56,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:56,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:56,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81686672] [2021-10-13 08:11:56,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81686672] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:56,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:56,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:56,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515080734] [2021-10-13 08:11:56,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:56,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:56,790 INFO L87 Difference]: Start difference. First operand has 17 states, 8 states have (on average 2.125) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:56,819 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-13 08:11:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 08:11:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:56,830 INFO L225 Difference]: With dead ends: 21 [2021-10-13 08:11:56,831 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 08:11:56,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 08:11:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-13 08:11:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-13 08:11:56,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2021-10-13 08:11:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:56,869 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-13 08:11:56,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-13 08:11:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:11:56,870 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:56,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:11:56,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:11:56,871 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash 77202, now seen corresponding path program 1 times [2021-10-13 08:11:56,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:56,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160088885] [2021-10-13 08:11:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:56,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:56,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:56,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160088885] [2021-10-13 08:11:56,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160088885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:56,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:56,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:11:56,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79586772] [2021-10-13 08:11:56,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:56,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:56,946 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:56,975 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-13 08:11:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:56,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 08:11:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:56,982 INFO L225 Difference]: With dead ends: 15 [2021-10-13 08:11:56,983 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 08:11:56,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 08:11:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 08:11:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-13 08:11:56,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2021-10-13 08:11:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:56,990 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-13 08:11:56,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-13 08:11:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:11:56,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:56,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:11:56,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:11:56,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash 77203, now seen corresponding path program 1 times [2021-10-13 08:11:56,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:56,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106014255] [2021-10-13 08:11:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:56,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:57,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:57,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106014255] [2021-10-13 08:11:57,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106014255] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:57,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:57,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:11:57,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981123356] [2021-10-13 08:11:57,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:57,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,074 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:57,097 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-13 08:11:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 08:11:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:57,099 INFO L225 Difference]: With dead ends: 16 [2021-10-13 08:11:57,099 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 08:11:57,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 08:11:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 08:11:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-13 08:11:57,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2021-10-13 08:11:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:57,103 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-13 08:11:57,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-13 08:11:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:11:57,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:57,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:11:57,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:11:57,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:57,117 INFO L82 PathProgramCache]: Analyzing trace with hash 74227319, now seen corresponding path program 1 times [2021-10-13 08:11:57,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:57,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580951698] [2021-10-13 08:11:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:11:57,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:57,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580951698] [2021-10-13 08:11:57,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580951698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:57,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:57,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:11:57,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494608842] [2021-10-13 08:11:57,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:57,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,166 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:57,181 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-13 08:11:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:11:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:57,184 INFO L225 Difference]: With dead ends: 15 [2021-10-13 08:11:57,184 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 08:11:57,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 08:11:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 08:11:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-13 08:11:57,192 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2021-10-13 08:11:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:57,193 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-13 08:11:57,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-13 08:11:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:11:57,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:57,197 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-13 08:11:57,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:11:57,197 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash 74226041, now seen corresponding path program 1 times [2021-10-13 08:11:57,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:57,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874743159] [2021-10-13 08:11:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:57,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:57,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874743159] [2021-10-13 08:11:57,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874743159] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:57,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:57,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:11:57,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018997405] [2021-10-13 08:11:57,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:11:57,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:11:57,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:11:57,309 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:57,343 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-13 08:11:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:11:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:11:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:57,345 INFO L225 Difference]: With dead ends: 13 [2021-10-13 08:11:57,345 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 08:11:57,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:11:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 08:11:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-13 08:11:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-13 08:11:57,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2021-10-13 08:11:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:57,349 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-13 08:11:57,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-13 08:11:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:11:57,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:57,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:11:57,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 08:11:57,351 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1993920354, now seen corresponding path program 1 times [2021-10-13 08:11:57,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:57,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487195475] [2021-10-13 08:11:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:11:57,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:57,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487195475] [2021-10-13 08:11:57,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487195475] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:57,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:57,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:11:57,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590438688] [2021-10-13 08:11:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:57,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,382 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:57,398 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-13 08:11:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 08:11:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:57,400 INFO L225 Difference]: With dead ends: 11 [2021-10-13 08:11:57,401 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 08:11:57,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 08:11:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 08:11:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-13 08:11:57,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2021-10-13 08:11:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:57,405 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-13 08:11:57,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-13 08:11:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:11:57,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:57,407 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:57,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 08:11:57,407 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:11:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:57,411 INFO L82 PathProgramCache]: Analyzing trace with hash -602044415, now seen corresponding path program 1 times [2021-10-13 08:11:57,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:57,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867371195] [2021-10-13 08:11:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:57,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:57,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867371195] [2021-10-13 08:11:57,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867371195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:11:57,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578237916] [2021-10-13 08:11:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:11:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:11:57,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:11:57,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:11:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:11:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:57,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:57,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578237916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:11:57,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386956110] [2021-10-13 08:11:57,691 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 08:11:57,692 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:11:57,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:11:57,707 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:11:57,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:11:57,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,753 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:11:57,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-13 08:11:57,756 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:11:57,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 08:11:57,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-13 08:11:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:11:57,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 08:11:57,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 08:11:57,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:11:57,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:11:57,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 08:11:57,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:11:57,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-10-13 08:11:57,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:58,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:11:58,037 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_46| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:11:58,041 INFO L168 Benchmark]: Toolchain (without parser) took 2353.53 ms. Allocated memory is still 119.5 MB. Free memory was 81.0 MB in the beginning and 63.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:11:58,041 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 119.5 MB. Free memory is still 97.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:11:58,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.68 ms. Allocated memory is still 119.5 MB. Free memory was 80.8 MB in the beginning and 95.2 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:11:58,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.81 ms. Allocated memory is still 119.5 MB. Free memory was 95.2 MB in the beginning and 93.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:11:58,043 INFO L168 Benchmark]: Boogie Preprocessor took 22.95 ms. Allocated memory is still 119.5 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:11:58,043 INFO L168 Benchmark]: RCFGBuilder took 472.42 ms. Allocated memory is still 119.5 MB. Free memory was 92.5 MB in the beginning and 77.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:11:58,043 INFO L168 Benchmark]: TraceAbstraction took 1546.23 ms. Allocated memory is still 119.5 MB. Free memory was 76.7 MB in the beginning and 63.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:11:58,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 119.5 MB. Free memory is still 97.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.68 ms. Allocated memory is still 119.5 MB. Free memory was 80.8 MB in the beginning and 95.2 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.81 ms. Allocated memory is still 119.5 MB. Free memory was 95.2 MB in the beginning and 93.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.95 ms. Allocated memory is still 119.5 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 472.42 ms. Allocated memory is still 119.5 MB. Free memory was 92.5 MB in the beginning and 77.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1546.23 ms. Allocated memory is still 119.5 MB. Free memory was 76.7 MB in the beginning and 63.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_46| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_46|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:11:58,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:12:00,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:12:00,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:12:00,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:12:00,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:12:00,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:12:00,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:12:00,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:12:00,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:12:00,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:12:00,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:12:00,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:12:00,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:12:00,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:12:00,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:12:00,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:12:00,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:12:00,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:12:00,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:12:00,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:12:00,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:12:00,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:12:00,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:12:00,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:12:00,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:12:00,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:12:00,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:12:00,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:12:00,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:12:00,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:12:00,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:12:00,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:12:00,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:12:00,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:12:00,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:12:00,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:12:00,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:12:00,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:12:00,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:12:00,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:12:00,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:12:00,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 08:12:00,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:12:00,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:12:00,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:12:00,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:12:00,840 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:12:00,840 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:12:00,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:12:00,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:12:00,841 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:12:00,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:12:00,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:12:00,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:12:00,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:12:00,844 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:12:00,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:12:00,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:12:00,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:12:00,844 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:12:00,845 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:12:00,845 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:12:00,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:12:00,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:12:00,845 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:12:00,846 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:12:00,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:12:00,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:12:00,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:12:00,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:12:00,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:12:00,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:12:00,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:12:00,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:12:00,848 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:12:00,848 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:00,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:12:00,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:12:00,848 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2021-10-13 08:12:01,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:12:01,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:12:01,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:12:01,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:12:01,285 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:12:01,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-10-13 08:12:01,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/a80177b51/a4245b4d338c4ef2b7e6543dc33fbb29/FLAGd76b75670 [2021-10-13 08:12:01,988 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:12:01,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-10-13 08:12:01,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/a80177b51/a4245b4d338c4ef2b7e6543dc33fbb29/FLAGd76b75670 [2021-10-13 08:12:02,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/data/a80177b51/a4245b4d338c4ef2b7e6543dc33fbb29 [2021-10-13 08:12:02,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:12:02,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:12:02,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:12:02,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:12:02,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:12:02,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22daf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02, skipping insertion in model container [2021-10-13 08:12:02,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:12:02,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:12:02,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:12:02,568 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:12:02,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:12:02,599 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:12:02,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02 WrapperNode [2021-10-13 08:12:02,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:12:02,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:12:02,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:12:02,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:12:02,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:12:02,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:12:02,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:12:02,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:12:02,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:12:02,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:12:02,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:12:02,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:12:02,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (1/1) ... [2021-10-13 08:12:02,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:12:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:02,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:12:02,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:12:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:12:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 08:12:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:12:02,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:12:02,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 08:12:02,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:12:03,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:12:03,055 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:12:03,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:03 BoogieIcfgContainer [2021-10-13 08:12:03,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:12:03,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:12:03,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:12:03,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:12:03,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:12:02" (1/3) ... [2021-10-13 08:12:03,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3305e905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:12:03, skipping insertion in model container [2021-10-13 08:12:03,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:02" (2/3) ... [2021-10-13 08:12:03,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3305e905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:12:03, skipping insertion in model container [2021-10-13 08:12:03,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:03" (3/3) ... [2021-10-13 08:12:03,066 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2021-10-13 08:12:03,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:12:03,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-13 08:12:03,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:12:03,131 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:12:03,132 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-13 08:12:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:12:03,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:03,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:12:03,154 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash 926021, now seen corresponding path program 1 times [2021-10-13 08:12:03,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:03,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651992322] [2021-10-13 08:12:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:03,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:03,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:03,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:12:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:12:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:03,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:03,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:03,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651992322] [2021-10-13 08:12:03,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651992322] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:03,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:03,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:12:03,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775936161] [2021-10-13 08:12:03,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:12:03,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:12:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:12:03,313 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:03,325 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-13 08:12:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:12:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:12:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:03,358 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:12:03,358 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 08:12:03,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:12:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 08:12:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 08:12:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-13 08:12:03,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2021-10-13 08:12:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:03,427 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-13 08:12:03,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-13 08:12:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:12:03,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:03,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:12:03,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:03,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:03,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2021-10-13 08:12:03,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:03,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038519136] [2021-10-13 08:12:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:03,643 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:03,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:03,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:12:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:12:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:03,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:03,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038519136] [2021-10-13 08:12:03,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038519136] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:03,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:03,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:12:03,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115189007] [2021-10-13 08:12:03,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:12:03,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:12:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:12:03,742 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:03,793 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-13 08:12:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:12:03,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:12:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:03,794 INFO L225 Difference]: With dead ends: 30 [2021-10-13 08:12:03,794 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 08:12:03,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:12:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 08:12:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-10-13 08:12:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-13 08:12:03,800 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 4 [2021-10-13 08:12:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:03,801 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-13 08:12:03,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-13 08:12:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:12:03,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:03,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:12:03,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:04,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-13 08:12:04,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:04,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59235108] [2021-10-13 08:12:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:04,005 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:04,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:04,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:04,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:12:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:04,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:12:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:04,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:04,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:04,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:04,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59235108] [2021-10-13 08:12:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59235108] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:04,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:04,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:12:04,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876855754] [2021-10-13 08:12:04,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:12:04,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:12:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:12:04,145 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:04,199 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-13 08:12:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:12:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:12:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:04,201 INFO L225 Difference]: With dead ends: 30 [2021-10-13 08:12:04,201 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 08:12:04,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:12:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 08:12:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-10-13 08:12:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-13 08:12:04,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 4 [2021-10-13 08:12:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:04,207 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-13 08:12:04,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-13 08:12:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:12:04,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:04,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:12:04,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:04,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:04,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-10-13 08:12:04,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:04,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891260472] [2021-10-13 08:12:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:04,421 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:04,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:04,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:04,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:12:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:12:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:04,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:04,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:04,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:04,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891260472] [2021-10-13 08:12:04,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891260472] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:04,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:04,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:12:04,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527156186] [2021-10-13 08:12:04,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:12:04,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:12:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:12:04,797 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:04,994 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-13 08:12:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:12:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 08:12:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:04,997 INFO L225 Difference]: With dead ends: 27 [2021-10-13 08:12:04,997 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 08:12:04,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:12:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 08:12:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 08:12:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-13 08:12:05,002 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 4 [2021-10-13 08:12:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:05,002 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-13 08:12:05,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-13 08:12:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:12:05,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:05,003 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 08:12:05,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:05,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:05,215 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 276944789, now seen corresponding path program 1 times [2021-10-13 08:12:05,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:05,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763646775] [2021-10-13 08:12:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:05,218 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:05,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:05,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:12:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:05,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:12:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:05,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:05,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:05,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763646775] [2021-10-13 08:12:05,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763646775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:05,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [817292030] [2021-10-13 08:12:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:05,496 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:05,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:05,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 08:12:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:12:05,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 08:12:05,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 08:12:05,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [817292030] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:05,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:12:05,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-10-13 08:12:05,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883412816] [2021-10-13 08:12:05,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:12:05,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:12:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:12:05,692 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:05,725 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-13 08:12:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:12:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:12:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:05,727 INFO L225 Difference]: With dead ends: 29 [2021-10-13 08:12:05,728 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 08:12:05,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:12:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 08:12:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-10-13 08:12:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-13 08:12:05,741 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-10-13 08:12:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:05,742 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-13 08:12:05,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-13 08:12:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:12:05,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:05,743 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2021-10-13 08:12:05,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 08:12:05,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:06,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:06,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash 276944844, now seen corresponding path program 1 times [2021-10-13 08:12:06,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:06,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336216838] [2021-10-13 08:12:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:06,146 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:06,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:06,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:12:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:12:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:06,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:07,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:07,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336216838] [2021-10-13 08:12:07,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336216838] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:07,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477609606] [2021-10-13 08:12:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:07,239 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:07,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:07,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:07,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 08:12:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:12:07,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:07,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:07,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1477609606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:07,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054760189] [2021-10-13 08:12:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:07,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:07,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:07,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 08:12:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:12:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:07,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:08,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:08,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054760189] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:08,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:08,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 08:12:08,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963234937] [2021-10-13 08:12:08,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:12:08,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:08,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:12:08,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:12:08,448 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:09,825 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-10-13 08:12:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:12:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:12:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:09,828 INFO L225 Difference]: With dead ends: 78 [2021-10-13 08:12:09,828 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 08:12:09,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:12:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 08:12:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 42. [2021-10-13 08:12:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-13 08:12:09,835 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 12 [2021-10-13 08:12:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-13 08:12:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-13 08:12:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:12:09,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:09,836 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-13 08:12:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:10,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:10,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:10,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:10,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1401693725, now seen corresponding path program 1 times [2021-10-13 08:12:10,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:10,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845219156] [2021-10-13 08:12:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:10,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:10,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:10,446 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:10,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 08:12:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:12:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:10,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:10,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845219156] [2021-10-13 08:12:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845219156] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:10,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31866176] [2021-10-13 08:12:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:10,770 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:10,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:10,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 08:12:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:12:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:12:11,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:12:11,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [31866176] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:11,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:12:11,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 11 [2021-10-13 08:12:11,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095366543] [2021-10-13 08:12:11,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:12:11,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:12:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:12:11,082 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:11,127 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-10-13 08:12:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:12:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 08:12:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:11,128 INFO L225 Difference]: With dead ends: 44 [2021-10-13 08:12:11,129 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 08:12:11,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:12:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 08:12:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-10-13 08:12:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-10-13 08:12:11,134 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 17 [2021-10-13 08:12:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:11,134 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-10-13 08:12:11,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-10-13 08:12:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:12:11,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:11,135 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:11,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:11,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:11,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:11,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1592059456, now seen corresponding path program 1 times [2021-10-13 08:12:11,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:11,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215758777] [2021-10-13 08:12:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:11,548 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:11,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:11,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:12:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:11,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:12:11,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:11,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:11,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:11,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215758777] [2021-10-13 08:12:11,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215758777] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:11,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604601404] [2021-10-13 08:12:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:11,907 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:11,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:11,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:11,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 08:12:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:12:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:12,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:12,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604601404] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:12,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008797654] [2021-10-13 08:12:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:12,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:12,281 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:12,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 08:12:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:12:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008797654] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:12,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:12,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2021-10-13 08:12:12,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001828231] [2021-10-13 08:12:12,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 08:12:12,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 08:12:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:12:12,753 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:13,035 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-10-13 08:12:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:12:13,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 08:12:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:13,037 INFO L225 Difference]: With dead ends: 49 [2021-10-13 08:12:13,037 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 08:12:13,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:12:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 08:12:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-13 08:12:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-10-13 08:12:13,042 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 19 [2021-10-13 08:12:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:13,042 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-10-13 08:12:13,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-10-13 08:12:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 08:12:13,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:13,044 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2021-10-13 08:12:13,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:13,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:13,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-13 08:12:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:13,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash -164588328, now seen corresponding path program 2 times [2021-10-13 08:12:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:13,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754041375] [2021-10-13 08:12:13,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:13,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:13,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:13,657 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:13,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 08:12:13,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:12:13,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:14,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:16,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:16,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754041375] [2021-10-13 08:12:16,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754041375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:16,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [330820649] [2021-10-13 08:12:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:16,582 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:16,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:16,583 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:16,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 08:12:16,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:16,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:12:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:17,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:19,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [330820649] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:19,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333678838] [2021-10-13 08:12:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:19,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:19,693 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:19,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 08:12:19,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:19,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:12:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:20,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:24,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333678838] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:24,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:24,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8, 8, 11] total 28 [2021-10-13 08:12:24,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094144294] [2021-10-13 08:12:24,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 08:12:24,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 08:12:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-10-13 08:12:24,462 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:38,024 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2021-10-13 08:12:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 08:12:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 08:12:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:38,027 INFO L225 Difference]: With dead ends: 142 [2021-10-13 08:12:38,027 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 08:12:38,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 13282.8ms TimeCoverageRelationStatistics Valid=414, Invalid=992, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 08:12:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 08:12:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 73. [2021-10-13 08:12:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-10-13 08:12:38,036 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 28 [2021-10-13 08:12:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:38,037 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-10-13 08:12:38,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-10-13 08:12:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 08:12:38,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:38,039 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:38,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:38,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:38,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:38,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:38,653 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:38,654 INFO L82 PathProgramCache]: Analyzing trace with hash 415018577, now seen corresponding path program 2 times [2021-10-13 08:12:38,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:38,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330989493] [2021-10-13 08:12:38,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:38,655 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:38,657 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:38,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:12:38,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:12:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:39,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:39,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:39,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330989493] [2021-10-13 08:12:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330989493] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:39,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [379105817] [2021-10-13 08:12:39,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:39,412 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:39,418 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:39,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 08:12:39,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:39,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:12:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:40,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:40,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [379105817] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:40,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927710447] [2021-10-13 08:12:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:40,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:40,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:40,175 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:40,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 08:12:40,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:12:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 08:12:41,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 08:12:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:41,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:42,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927710447] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:42,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:42,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 13] total 35 [2021-10-13 08:12:42,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040108894] [2021-10-13 08:12:42,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 08:12:42,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 08:12:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 08:12:42,306 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 35 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:47,920 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-10-13 08:12:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 08:12:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 08:12:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:47,922 INFO L225 Difference]: With dead ends: 94 [2021-10-13 08:12:47,922 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 08:12:47,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 5555.1ms TimeCoverageRelationStatistics Valid=670, Invalid=1880, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 08:12:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 08:12:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-10-13 08:12:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-10-13 08:12:47,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2021-10-13 08:12:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:47,938 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-10-13 08:12:47,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-10-13 08:12:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 08:12:47,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:47,940 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:47,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:48,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:48,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 08:12:48,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:48,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-10-13 08:12:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1707940107, now seen corresponding path program 3 times [2021-10-13 08:12:48,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:48,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505310027] [2021-10-13 08:12:48,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:12:48,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:48,546 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:48,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 08:12:49,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 08:12:49,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 08:12:49,029 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:12:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:12:49,126 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:12:49,126 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:12:49,127 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 08:12:49,129 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 08:12:49,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 08:12:49,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:12:49,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:12:49,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:12:49,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 08:12:49,131 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 08:12:49,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:49,339 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:12:49,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:12:49 BoogieIcfgContainer [2021-10-13 08:12:49,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:12:49,385 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:12:49,385 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:12:49,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:12:49,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:03" (3/4) ... [2021-10-13 08:12:49,388 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:12:49,468 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:12:49,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:12:49,470 INFO L168 Benchmark]: Toolchain (without parser) took 47116.29 ms. Allocated memory was 67.1 MB in the beginning and 88.1 MB in the end (delta: 21.0 MB). Free memory was 46.7 MB in the beginning and 34.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:49,471 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 67.1 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:12:49,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.59 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 37.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:49,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.45 ms. Allocated memory is still 67.1 MB. Free memory was 37.1 MB in the beginning and 35.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:12:49,473 INFO L168 Benchmark]: Boogie Preprocessor took 38.95 ms. Allocated memory is still 67.1 MB. Free memory was 35.7 MB in the beginning and 34.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:49,473 INFO L168 Benchmark]: RCFGBuilder took 378.54 ms. Allocated memory is still 67.1 MB. Free memory was 34.5 MB in the beginning and 42.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:49,474 INFO L168 Benchmark]: TraceAbstraction took 46325.40 ms. Allocated memory was 67.1 MB in the beginning and 88.1 MB in the end (delta: 21.0 MB). Free memory was 42.4 MB in the beginning and 36.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:49,474 INFO L168 Benchmark]: Witness Printer took 83.60 ms. Allocated memory is still 88.1 MB. Free memory was 36.5 MB in the beginning and 34.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:49,477 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 67.1 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.59 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 37.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.45 ms. Allocated memory is still 67.1 MB. Free memory was 37.1 MB in the beginning and 35.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.95 ms. Allocated memory is still 67.1 MB. Free memory was 35.7 MB in the beginning and 34.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 378.54 ms. Allocated memory is still 67.1 MB. Free memory was 34.5 MB in the beginning and 42.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 46325.40 ms. Allocated memory was 67.1 MB in the beginning and 88.1 MB in the end (delta: 21.0 MB). Free memory was 42.4 MB in the beginning and 36.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. * Witness Printer took 83.60 ms. Allocated memory is still 88.1 MB. Free memory was 36.5 MB in the beginning and 34.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND FALSE !(i < 10) [L14] free(p) [L14] free(p) [L14] free(p) [L16] p[2] - UnprovableResult [Line: 11]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 7]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 46213.3ms, OverallIterations: 11, TraceHistogramMax: 10, EmptinessCheckTime: 17.5ms, AutomataDifference: 21312.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 168 SDtfs, 1035 SDslu, 396 SDs, 0 SdLazy, 1019 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8123.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 727 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 20457.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=10, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 115.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 124 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 126.5ms SsaConstructionTime, 624.8ms SatisfiabilityAnalysisTime, 16532.8ms InterpolantComputationTime, 415 NumberOfCodeBlocks, 415 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 696 ConstructedInterpolants, 0 QuantifiedInterpolants, 6149 SizeOfPredicates, 12 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 40 InterpolantComputations, 12 PerfectInterpolantSequences, 42/1374 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! [2021-10-13 08:12:49,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b49770-25b9-4071-aa17-480f6b6bfe6c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...