./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI --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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI --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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:25:26,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:25:26,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:25:26,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:25:26,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:25:26,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:25:26,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:25:26,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:25:26,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:25:26,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:25:26,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:25:26,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:25:26,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:25:26,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:25:26,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:25:26,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:25:26,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:25:26,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:25:26,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:25:26,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:25:26,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:25:26,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:25:26,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:25:26,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:25:26,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:25:26,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:25:26,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:25:26,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:25:26,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:25:26,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:25:26,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:25:26,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:25:26,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:25:26,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:25:26,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:25:26,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:25:26,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:25:26,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:25:26,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:25:26,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:25:26,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:25:26,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:25:26,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:25:26,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:25:26,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:25:26,677 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:25:26,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:25:26,677 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:25:26,677 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:25:26,677 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:25:26,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:25:26,678 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:25:26,678 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:25:26,678 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:25:26,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:25:26,683 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:25:26,683 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:25:26,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:25:26,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:25:26,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:25:26,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:25:26,684 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:25:26,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:25:26,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:25:26,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:25:26,685 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:25:26,685 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:25:26,685 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:25:26,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:25:26,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:25:26,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:25:26,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:25:26,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:25:26,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:25:26,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:26,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:25:26,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:25:26,687 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:25:26,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:25:26,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:25:26,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:25:26,688 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_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2021-10-11 02:25:26,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:25:26,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:25:26,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:25:26,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:25:26,968 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:25:26,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-11 02:25:27,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/97d0f22e4/f2f518dae3cd481da16c764b4678344d/FLAGdadb5c60f [2021-10-11 02:25:27,558 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:25:27,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-11 02:25:27,578 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/97d0f22e4/f2f518dae3cd481da16c764b4678344d/FLAGdadb5c60f [2021-10-11 02:25:27,878 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/97d0f22e4/f2f518dae3cd481da16c764b4678344d [2021-10-11 02:25:27,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:25:27,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:25:27,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:25:27,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:25:27,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:25:27,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:25:27" (1/1) ... [2021-10-11 02:25:27,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515e78a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:27, skipping insertion in model container [2021-10-11 02:25:27,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:25:27" (1/1) ... [2021-10-11 02:25:27,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:25:27,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:25:28,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:25:28,303 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:25:28,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:25:28,438 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:25:28,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28 WrapperNode [2021-10-11 02:25:28,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:25:28,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:25:28,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:25:28,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:25:28,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:25:28,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:25:28,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:25:28,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:25:28,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... [2021-10-11 02:25:28,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:25:28,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:25:28,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:25:28,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:25:28,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:25:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:25:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:25:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:25:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:25:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:25:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:25:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:25:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:25:28,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:25:29,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:25:29,375 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:25:29,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:29 BoogieIcfgContainer [2021-10-11 02:25:29,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:25:29,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:25:29,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:25:29,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:25:29,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:25:27" (1/3) ... [2021-10-11 02:25:29,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3f9062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:25:29, skipping insertion in model container [2021-10-11 02:25:29,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:28" (2/3) ... [2021-10-11 02:25:29,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3f9062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:25:29, skipping insertion in model container [2021-10-11 02:25:29,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:29" (3/3) ... [2021-10-11 02:25:29,386 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-10-11 02:25:29,399 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:25:29,402 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2021-10-11 02:25:29,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-11 02:25:29,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:25:29,433 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:25:29,434 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:25:29,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:25:29,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:25:29,434 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:25:29,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:25:29,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:25:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2021-10-11 02:25:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:25:29,453 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:29,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:25:29,454 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 5730039, now seen corresponding path program 1 times [2021-10-11 02:25:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:29,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341122274] [2021-10-11 02:25:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:29,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341122274] [2021-10-11 02:25:29,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:29,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598202354] [2021-10-11 02:25:29,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:25:29,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:29,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:25:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:25:29,613 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2021-10-11 02:25:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:29,626 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-10-11 02:25:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:25:29,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2021-10-11 02:25:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:29,637 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:25:29,637 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 02:25:29,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:25:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 02:25:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-11 02:25:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-11 02:25:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-10-11 02:25:29,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 4 [2021-10-11 02:25:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:29,673 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-10-11 02:25:29,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:25:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-10-11 02:25:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:25:29,674 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:29,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:25:29,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:25:29,675 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash 178885902, now seen corresponding path program 1 times [2021-10-11 02:25:29,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:29,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46792007] [2021-10-11 02:25:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:29,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46792007] [2021-10-11 02:25:29,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:29,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:25:29,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482333459] [2021-10-11 02:25:29,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:29,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:29,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:29,755 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 3 states. [2021-10-11 02:25:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:29,875 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2021-10-11 02:25:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:29,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:25:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:29,878 INFO L225 Difference]: With dead ends: 84 [2021-10-11 02:25:29,879 INFO L226 Difference]: Without dead ends: 83 [2021-10-11 02:25:29,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-11 02:25:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-11 02:25:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-11 02:25:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2021-10-11 02:25:29,899 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 5 [2021-10-11 02:25:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:29,899 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2021-10-11 02:25:29,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2021-10-11 02:25:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:25:29,900 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:29,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:25:29,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:25:29,902 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash 178884958, now seen corresponding path program 1 times [2021-10-11 02:25:29,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:29,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72565083] [2021-10-11 02:25:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:29,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72565083] [2021-10-11 02:25:29,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:29,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:29,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107891378] [2021-10-11 02:25:29,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:29,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:29,997 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand 3 states. [2021-10-11 02:25:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:30,058 INFO L93 Difference]: Finished difference Result 116 states and 179 transitions. [2021-10-11 02:25:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:30,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:25:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:30,060 INFO L225 Difference]: With dead ends: 116 [2021-10-11 02:25:30,061 INFO L226 Difference]: Without dead ends: 115 [2021-10-11 02:25:30,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-11 02:25:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2021-10-11 02:25:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-10-11 02:25:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2021-10-11 02:25:30,087 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 5 [2021-10-11 02:25:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:30,088 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2021-10-11 02:25:30,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2021-10-11 02:25:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:25:30,088 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:30,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:25:30,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:25:30,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1250409977, now seen corresponding path program 1 times [2021-10-11 02:25:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603259516] [2021-10-11 02:25:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:30,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603259516] [2021-10-11 02:25:30,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:30,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:30,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222117894] [2021-10-11 02:25:30,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:30,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:30,147 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand 3 states. [2021-10-11 02:25:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:30,234 INFO L93 Difference]: Finished difference Result 146 states and 235 transitions. [2021-10-11 02:25:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:30,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:25:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:30,242 INFO L225 Difference]: With dead ends: 146 [2021-10-11 02:25:30,242 INFO L226 Difference]: Without dead ends: 146 [2021-10-11 02:25:30,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-11 02:25:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2021-10-11 02:25:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-10-11 02:25:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 223 transitions. [2021-10-11 02:25:30,263 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 223 transitions. Word has length 6 [2021-10-11 02:25:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:30,264 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 223 transitions. [2021-10-11 02:25:30,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 223 transitions. [2021-10-11 02:25:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:25:30,264 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:30,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:25:30,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:25:30,265 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1250409978, now seen corresponding path program 1 times [2021-10-11 02:25:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:30,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700114130] [2021-10-11 02:25:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:30,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700114130] [2021-10-11 02:25:30,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:30,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:30,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415997797] [2021-10-11 02:25:30,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:30,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:30,330 INFO L87 Difference]: Start difference. First operand 127 states and 223 transitions. Second operand 3 states. [2021-10-11 02:25:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:30,404 INFO L93 Difference]: Finished difference Result 141 states and 226 transitions. [2021-10-11 02:25:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:30,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:25:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:30,407 INFO L225 Difference]: With dead ends: 141 [2021-10-11 02:25:30,407 INFO L226 Difference]: Without dead ends: 141 [2021-10-11 02:25:30,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-11 02:25:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2021-10-11 02:25:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-10-11 02:25:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 215 transitions. [2021-10-11 02:25:30,420 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 215 transitions. Word has length 6 [2021-10-11 02:25:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:30,420 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 215 transitions. [2021-10-11 02:25:30,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 215 transitions. [2021-10-11 02:25:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:25:30,421 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:30,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:30,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:25:30,421 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash 108011627, now seen corresponding path program 1 times [2021-10-11 02:25:30,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:30,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095700598] [2021-10-11 02:25:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:30,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095700598] [2021-10-11 02:25:30,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:30,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:25:30,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317232847] [2021-10-11 02:25:30,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:25:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:25:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:30,466 INFO L87 Difference]: Start difference. First operand 125 states and 215 transitions. Second operand 4 states. [2021-10-11 02:25:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:30,489 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2021-10-11 02:25:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:25:30,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:25:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:30,491 INFO L225 Difference]: With dead ends: 136 [2021-10-11 02:25:30,491 INFO L226 Difference]: Without dead ends: 136 [2021-10-11 02:25:30,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-11 02:25:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 79. [2021-10-11 02:25:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-11 02:25:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2021-10-11 02:25:30,502 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 7 [2021-10-11 02:25:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:30,502 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2021-10-11 02:25:30,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:25:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2021-10-11 02:25:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:25:30,503 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:30,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:30,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:25:30,503 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash -896205382, now seen corresponding path program 1 times [2021-10-11 02:25:30,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:30,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803261757] [2021-10-11 02:25:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803261757] [2021-10-11 02:25:30,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:30,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:25:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432971737] [2021-10-11 02:25:30,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:25:30,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:25:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:30,568 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 4 states. [2021-10-11 02:25:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:30,616 INFO L93 Difference]: Finished difference Result 173 states and 247 transitions. [2021-10-11 02:25:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:25:30,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:25:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:30,618 INFO L225 Difference]: With dead ends: 173 [2021-10-11 02:25:30,618 INFO L226 Difference]: Without dead ends: 173 [2021-10-11 02:25:30,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:25:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-11 02:25:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2021-10-11 02:25:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-10-11 02:25:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 173 transitions. [2021-10-11 02:25:30,637 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 173 transitions. Word has length 8 [2021-10-11 02:25:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:30,637 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 173 transitions. [2021-10-11 02:25:30,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:25:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 173 transitions. [2021-10-11 02:25:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:25:30,638 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:30,639 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:30,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:25:30,640 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:30,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1590894966, now seen corresponding path program 1 times [2021-10-11 02:25:30,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:30,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420698336] [2021-10-11 02:25:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:25:30,685 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:25:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:25:30,720 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:25:30,759 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:25:30,759 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:25:30,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:25:30,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:25:30 BoogieIcfgContainer [2021-10-11 02:25:30,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:25:30,807 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:25:30,807 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:25:30,807 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:25:30,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:29" (3/4) ... [2021-10-11 02:25:30,811 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:25:30,811 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:25:30,813 INFO L168 Benchmark]: Toolchain (without parser) took 2929.59 ms. Allocated memory was 123.7 MB in the beginning and 157.3 MB in the end (delta: 33.6 MB). Free memory was 90.8 MB in the beginning and 116.3 MB in the end (delta: -25.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:30,814 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory is still 41.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:30,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.96 ms. Allocated memory is still 123.7 MB. Free memory was 90.5 MB in the beginning and 86.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:30,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.42 ms. Allocated memory is still 123.7 MB. Free memory was 86.4 MB in the beginning and 84.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:30,816 INFO L168 Benchmark]: Boogie Preprocessor took 53.47 ms. Allocated memory is still 123.7 MB. Free memory was 84.3 MB in the beginning and 83.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:30,816 INFO L168 Benchmark]: RCFGBuilder took 835.93 ms. Allocated memory is still 123.7 MB. Free memory was 82.6 MB in the beginning and 75.4 MB in the end (delta: 7.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:30,817 INFO L168 Benchmark]: TraceAbstraction took 1427.27 ms. Allocated memory was 123.7 MB in the beginning and 157.3 MB in the end (delta: 33.6 MB). Free memory was 74.6 MB in the beginning and 116.3 MB in the end (delta: -41.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:30,817 INFO L168 Benchmark]: Witness Printer took 4.59 ms. Allocated memory is still 157.3 MB. Free memory is still 116.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:30,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory is still 41.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 551.96 ms. Allocated memory is still 123.7 MB. Free memory was 90.5 MB in the beginning and 86.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.42 ms. Allocated memory is still 123.7 MB. Free memory was 86.4 MB in the beginning and 84.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.47 ms. Allocated memory is still 123.7 MB. Free memory was 84.3 MB in the beginning and 83.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 835.93 ms. Allocated memory is still 123.7 MB. Free memory was 82.6 MB in the beginning and 75.4 MB in the end (delta: 7.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1427.27 ms. Allocated memory was 123.7 MB in the beginning and 157.3 MB in the end (delta: 33.6 MB). Free memory was 74.6 MB in the beginning and 116.3 MB in the end (delta: -41.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.59 ms. Allocated memory is still 157.3 MB. Free memory is still 116.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 482 SDtfs, 325 SDslu, 295 SDs, 0 SdLazy, 148 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 418 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:25:33,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:25:33,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:25:33,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:25:33,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:25:33,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:25:33,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:25:33,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:25:33,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:25:33,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:25:33,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:25:33,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:25:33,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:25:33,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:25:33,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:25:33,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:25:33,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:25:33,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:25:33,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:25:33,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:25:33,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:25:33,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:25:33,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:25:33,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:25:33,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:25:33,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:25:33,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:25:33,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:25:33,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:25:33,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:25:33,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:25:33,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:25:33,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:25:33,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:25:33,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:25:33,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:25:33,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:25:33,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:25:33,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:25:33,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:25:33,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:25:33,369 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-11 02:25:33,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:25:33,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:25:33,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:25:33,402 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:25:33,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:25:33,402 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:25:33,402 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:25:33,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:25:33,403 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:25:33,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:25:33,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:25:33,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:25:33,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:25:33,406 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:25:33,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:25:33,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:25:33,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:25:33,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:25:33,407 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:25:33,407 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:25:33,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:25:33,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:25:33,408 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:25:33,408 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:25:33,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:25:33,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:25:33,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:25:33,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:25:33,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:25:33,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:33,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:25:33,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:25:33,410 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:25:33,411 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:25:33,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:25:33,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:25:33,411 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_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2021-10-11 02:25:33,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:25:33,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:25:33,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:25:33,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:25:33,866 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:25:33,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-11 02:25:33,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/fee3cee3a/96feb71e11634d6a975801f62c6795bb/FLAGa4766e1eb [2021-10-11 02:25:34,577 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:25:34,578 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-11 02:25:34,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/fee3cee3a/96feb71e11634d6a975801f62c6795bb/FLAGa4766e1eb [2021-10-11 02:25:34,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/data/fee3cee3a/96feb71e11634d6a975801f62c6795bb [2021-10-11 02:25:34,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:25:34,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:25:34,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:25:34,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:25:34,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:25:34,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:25:34" (1/1) ... [2021-10-11 02:25:34,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32bf7226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:34, skipping insertion in model container [2021-10-11 02:25:34,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:25:34" (1/1) ... [2021-10-11 02:25:34,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:25:34,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:25:35,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:25:35,333 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:25:35,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:25:35,470 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:25:35,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35 WrapperNode [2021-10-11 02:25:35,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:25:35,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:25:35,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:25:35,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:25:35,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:25:35,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:25:35,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:25:35,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:25:35,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... [2021-10-11 02:25:35,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:25:35,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:25:35,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:25:35,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:25:35,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 02:25:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:25:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:25:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:25:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:25:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:25:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-11 02:25:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:25:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:25:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:25:36,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:25:36,531 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:25:36,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:36 BoogieIcfgContainer [2021-10-11 02:25:36,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:25:36,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:25:36,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:25:36,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:25:36,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:25:34" (1/3) ... [2021-10-11 02:25:36,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f03b61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:25:36, skipping insertion in model container [2021-10-11 02:25:36,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:35" (2/3) ... [2021-10-11 02:25:36,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f03b61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:25:36, skipping insertion in model container [2021-10-11 02:25:36,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:36" (3/3) ... [2021-10-11 02:25:36,541 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-10-11 02:25:36,555 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:25:36,559 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2021-10-11 02:25:36,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-11 02:25:36,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:25:36,595 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:25:36,595 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:25:36,595 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:25:36,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:25:36,595 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:25:36,596 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:25:36,596 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:25:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2021-10-11 02:25:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:25:36,618 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:36,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:25:36,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 28701576, now seen corresponding path program 1 times [2021-10-11 02:25:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:36,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053896781] [2021-10-11 02:25:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:25:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:36,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:25:36,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053896781] [2021-10-11 02:25:36,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:36,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696957440] [2021-10-11 02:25:36,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:36,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:36,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:36,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:36,786 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2021-10-11 02:25:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:36,855 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2021-10-11 02:25:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:36,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:25:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:36,867 INFO L225 Difference]: With dead ends: 103 [2021-10-11 02:25:36,868 INFO L226 Difference]: Without dead ends: 101 [2021-10-11 02:25:36,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-11 02:25:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-10-11 02:25:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-10-11 02:25:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-10-11 02:25:36,913 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 5 [2021-10-11 02:25:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:36,913 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-10-11 02:25:36,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-10-11 02:25:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:25:36,914 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:36,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:25:37,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:25:37,132 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash 889747453, now seen corresponding path program 1 times [2021-10-11 02:25:37,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:37,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356712355] [2021-10-11 02:25:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:37,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:25:37,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:37,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:25:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356712355] [2021-10-11 02:25:37,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:37,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:37,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825841428] [2021-10-11 02:25:37,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:37,249 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand 3 states. [2021-10-11 02:25:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:37,408 INFO L93 Difference]: Finished difference Result 155 states and 235 transitions. [2021-10-11 02:25:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:37,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:25:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:37,411 INFO L225 Difference]: With dead ends: 155 [2021-10-11 02:25:37,412 INFO L226 Difference]: Without dead ends: 152 [2021-10-11 02:25:37,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-11 02:25:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2021-10-11 02:25:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-10-11 02:25:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 221 transitions. [2021-10-11 02:25:37,429 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 221 transitions. Word has length 6 [2021-10-11 02:25:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:37,429 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 221 transitions. [2021-10-11 02:25:37,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 221 transitions. [2021-10-11 02:25:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:25:37,430 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:37,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:25:37,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:25:37,645 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2021-10-11 02:25:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:37,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049160544] [2021-10-11 02:25:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:25:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:37,827 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 02:25:37,837 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:25:37,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:25:37,848 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:25:37,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2021-10-11 02:25:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:37,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:25:37,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049160544] [2021-10-11 02:25:37,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:37,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898223554] [2021-10-11 02:25:37,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:37,869 INFO L87 Difference]: Start difference. First operand 132 states and 221 transitions. Second operand 3 states. [2021-10-11 02:25:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:38,067 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2021-10-11 02:25:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:38,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:25:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:38,070 INFO L225 Difference]: With dead ends: 199 [2021-10-11 02:25:38,070 INFO L226 Difference]: Without dead ends: 199 [2021-10-11 02:25:38,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-11 02:25:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-10-11 02:25:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-10-11 02:25:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 304 transitions. [2021-10-11 02:25:38,102 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 304 transitions. Word has length 6 [2021-10-11 02:25:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:38,102 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 304 transitions. [2021-10-11 02:25:38,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 304 transitions. [2021-10-11 02:25:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:25:38,103 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:38,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:25:38,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:25:38,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2021-10-11 02:25:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:38,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672882924] [2021-10-11 02:25:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:38,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:25:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:38,392 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 02:25:38,394 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:25:38,402 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:25:38,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:25:38,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2021-10-11 02:25:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:38,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:25:38,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672882924] [2021-10-11 02:25:38,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:38,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:38,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873982284] [2021-10-11 02:25:38,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:38,443 INFO L87 Difference]: Start difference. First operand 178 states and 304 transitions. Second operand 3 states. [2021-10-11 02:25:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:38,620 INFO L93 Difference]: Finished difference Result 194 states and 309 transitions. [2021-10-11 02:25:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:38,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:25:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:38,623 INFO L225 Difference]: With dead ends: 194 [2021-10-11 02:25:38,623 INFO L226 Difference]: Without dead ends: 194 [2021-10-11 02:25:38,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-11 02:25:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2021-10-11 02:25:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-10-11 02:25:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 296 transitions. [2021-10-11 02:25:38,641 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 296 transitions. Word has length 6 [2021-10-11 02:25:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:38,641 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 296 transitions. [2021-10-11 02:25:38,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 296 transitions. [2021-10-11 02:25:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:25:38,642 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:38,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:38,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 02:25:38,856 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2021-10-11 02:25:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:38,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700275800] [2021-10-11 02:25:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:25:38,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:38,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:25:38,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700275800] [2021-10-11 02:25:38,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:38,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:25:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332967960] [2021-10-11 02:25:38,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:25:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:25:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:38,934 INFO L87 Difference]: Start difference. First operand 176 states and 296 transitions. Second operand 4 states. [2021-10-11 02:25:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:38,979 INFO L93 Difference]: Finished difference Result 226 states and 319 transitions. [2021-10-11 02:25:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:25:38,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:25:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:38,981 INFO L225 Difference]: With dead ends: 226 [2021-10-11 02:25:38,981 INFO L226 Difference]: Without dead ends: 226 [2021-10-11 02:25:38,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:25:38,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-11 02:25:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2021-10-11 02:25:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-10-11 02:25:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 219 transitions. [2021-10-11 02:25:38,995 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 219 transitions. Word has length 7 [2021-10-11 02:25:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:38,995 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 219 transitions. [2021-10-11 02:25:38,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:25:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 219 transitions. [2021-10-11 02:25:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:25:38,995 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:38,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:39,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 02:25:39,213 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash 346576936, now seen corresponding path program 1 times [2021-10-11 02:25:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:39,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274743335] [2021-10-11 02:25:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:25:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:39,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:25:39,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274743335] [2021-10-11 02:25:39,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:39,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:25:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416877108] [2021-10-11 02:25:39,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:25:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:25:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:39,310 INFO L87 Difference]: Start difference. First operand 134 states and 219 transitions. Second operand 4 states. [2021-10-11 02:25:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:39,362 INFO L93 Difference]: Finished difference Result 251 states and 398 transitions. [2021-10-11 02:25:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:25:39,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:25:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:39,364 INFO L225 Difference]: With dead ends: 251 [2021-10-11 02:25:39,365 INFO L226 Difference]: Without dead ends: 251 [2021-10-11 02:25:39,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:25:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-11 02:25:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2021-10-11 02:25:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-10-11 02:25:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 288 transitions. [2021-10-11 02:25:39,376 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 288 transitions. Word has length 8 [2021-10-11 02:25:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:39,377 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 288 transitions. [2021-10-11 02:25:39,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:25:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 288 transitions. [2021-10-11 02:25:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:25:39,377 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:39,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:39,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 02:25:39,588 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash 212840816, now seen corresponding path program 1 times [2021-10-11 02:25:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:39,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495939077] [2021-10-11 02:25:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:25:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:39,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:25:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:39,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495939077] [2021-10-11 02:25:39,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691579022] [2021-10-11 02:25:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:25:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:39,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:25:39,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:39,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:25:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:39,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573076909] [2021-10-11 02:25:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:25:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:39,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:25:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:40,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:25:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:40,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-11 02:25:40,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-11 02:25:40,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257755925] [2021-10-11 02:25:40,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:25:40,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:25:40,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:25:40,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:25:40,050 INFO L87 Difference]: Start difference. First operand 178 states and 288 transitions. Second operand 10 states. [2021-10-11 02:25:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:40,373 INFO L93 Difference]: Finished difference Result 709 states and 1136 transitions. [2021-10-11 02:25:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:25:40,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2021-10-11 02:25:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:40,379 INFO L225 Difference]: With dead ends: 709 [2021-10-11 02:25:40,379 INFO L226 Difference]: Without dead ends: 709 [2021-10-11 02:25:40,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:25:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-11 02:25:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 388. [2021-10-11 02:25:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2021-10-11 02:25:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 640 transitions. [2021-10-11 02:25:40,399 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 640 transitions. Word has length 11 [2021-10-11 02:25:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:40,400 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 640 transitions. [2021-10-11 02:25:40,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:25:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 640 transitions. [2021-10-11 02:25:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:25:40,401 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:40,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:41,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:25:41,006 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2021-10-11 02:25:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1598757208, now seen corresponding path program 1 times [2021-10-11 02:25:41,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:25:41,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549372523] [2021-10-11 02:25:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6b8924-5617-4059-9c27-f6e7538478a7/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 02:25:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:25:41,094 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:25:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:25:41,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:25:41,190 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:25:41,190 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:25:41,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2021-10-11 02:25:41,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:25:41 BoogieIcfgContainer [2021-10-11 02:25:41,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:25:41,449 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:25:41,449 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:25:41,449 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:25:41,450 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:36" (3/4) ... [2021-10-11 02:25:41,453 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:25:41,453 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:25:41,455 INFO L168 Benchmark]: Toolchain (without parser) took 6575.22 ms. Allocated memory was 60.8 MB in the beginning and 96.5 MB in the end (delta: 35.7 MB). Free memory was 39.1 MB in the beginning and 40.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:41,455 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 60.8 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:41,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 592.16 ms. Allocated memory is still 60.8 MB. Free memory was 38.9 MB in the beginning and 29.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:41,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.96 ms. Allocated memory is still 60.8 MB. Free memory was 29.3 MB in the beginning and 27.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:41,466 INFO L168 Benchmark]: Boogie Preprocessor took 55.88 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 27.3 MB in the beginning and 62.1 MB in the end (delta: -34.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:41,466 INFO L168 Benchmark]: RCFGBuilder took 936.17 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 56.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:41,467 INFO L168 Benchmark]: TraceAbstraction took 4913.49 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 56.1 MB in the beginning and 40.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:41,467 INFO L168 Benchmark]: Witness Printer took 4.26 ms. Allocated memory is still 96.5 MB. Free memory is still 40.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:41,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 60.8 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 592.16 ms. Allocated memory is still 60.8 MB. Free memory was 38.9 MB in the beginning and 29.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.96 ms. Allocated memory is still 60.8 MB. Free memory was 29.3 MB in the beginning and 27.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.88 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 27.3 MB in the beginning and 62.1 MB in the end (delta: -34.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 936.17 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 56.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4913.49 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 56.1 MB in the beginning and 40.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.26 ms. Allocated memory is still 96.5 MB. Free memory is still 40.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 779 SDtfs, 930 SDslu, 1026 SDs, 0 SdLazy, 283 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 563 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 2086 SizeOfPredicates, 14 NumberOfNonLiveVariables, 437 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...