./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_7.c --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_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/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_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/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_d301900b-e643-46a3-9a94-83e15895c298/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 d2a1f90505878c0035f7701a954d17ca4375eb05 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:31:00,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:00,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:00,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:00,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:00,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:00,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:00,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:00,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:00,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:00,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:00,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:00,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:00,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:00,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:00,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:00,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:00,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:00,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:00,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:00,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:00,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:00,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:00,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:00,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:00,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:00,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:00,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:00,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:00,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:00,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:00,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:00,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:00,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:00,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:00,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:00,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:00,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:00,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:00,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:00,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:00,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:31:00,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:00,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:00,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:00,578 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:00,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:00,578 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:00,579 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:00,579 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:00,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:00,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:00,581 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:00,581 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:00,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:00,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:00,582 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:00,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:31:00,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:31:00,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:00,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:00,584 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:31:00,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:00,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:00,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:00,585 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:31:00,585 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:31:00,585 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:31:00,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:00,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:00,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:00,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:00,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:00,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:00,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:00,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:00,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:00,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:00,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:00,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:00,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:00,591 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_d301900b-e643-46a3-9a94-83e15895c298/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2021-10-11 02:31:00,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:00,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:00,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:00,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:00,902 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:00,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/locks/test_locks_7.c [2021-10-11 02:31:00,994 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/data/8c1f7c249/727b2b64b3b8424a9c44958cdf553941/FLAGd0472e8bb [2021-10-11 02:31:01,475 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:01,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/sv-benchmarks/c/locks/test_locks_7.c [2021-10-11 02:31:01,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/data/8c1f7c249/727b2b64b3b8424a9c44958cdf553941/FLAGd0472e8bb [2021-10-11 02:31:01,866 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/data/8c1f7c249/727b2b64b3b8424a9c44958cdf553941 [2021-10-11 02:31:01,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:01,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:01,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:01,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:01,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:01,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:01" (1/1) ... [2021-10-11 02:31:01,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c579ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:01, skipping insertion in model container [2021-10-11 02:31:01,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:01" (1/1) ... [2021-10-11 02:31:01,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:01,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:02,109 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-10-11 02:31:02,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:02,121 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:02,142 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-10-11 02:31:02,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:02,156 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:02,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02 WrapperNode [2021-10-11 02:31:02,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:02,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:02,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:02,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:02,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:02,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:02,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:02,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:02,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... [2021-10-11 02:31:02,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:02,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:02,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:02,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:02,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/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 02:31:02,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:02,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:02,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:02,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:02,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:02,877 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:31:02,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:02 BoogieIcfgContainer [2021-10-11 02:31:02,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:02,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:02,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:02,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:02,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:01" (1/3) ... [2021-10-11 02:31:02,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0b1995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:02, skipping insertion in model container [2021-10-11 02:31:02,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:02" (2/3) ... [2021-10-11 02:31:02,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0b1995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:02, skipping insertion in model container [2021-10-11 02:31:02,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:02" (3/3) ... [2021-10-11 02:31:02,890 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-10-11 02:31:02,903 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:02,906 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 02:31:02,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 02:31:02,942 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:02,943 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:31:02,943 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:02,943 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:02,943 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:02,943 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:02,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:02,944 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:31:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:31:02,961 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:02,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:31:02,963 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 5452362, now seen corresponding path program 1 times [2021-10-11 02:31:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:02,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9385343] [2021-10-11 02:31:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,105 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 02:31:03,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9385343] [2021-10-11 02:31:03,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:03,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254751026] [2021-10-11 02:31:03,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:31:03,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:31:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:31:03,128 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-10-11 02:31:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,140 INFO L93 Difference]: Finished difference Result 23 states and 36 transitions. [2021-10-11 02:31:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:31:03,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2021-10-11 02:31:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,150 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:31:03,150 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:31:03,151 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 02:31:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:31:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:31:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:31:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 35 transitions. [2021-10-11 02:31:03,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 35 transitions. Word has length 4 [2021-10-11 02:31:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,199 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 35 transitions. [2021-10-11 02:31:03,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:31:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 35 transitions. [2021-10-11 02:31:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:31:03,200 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:31:03,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:03,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash 164732346, now seen corresponding path program 1 times [2021-10-11 02:31:03,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245708426] [2021-10-11 02:31:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,298 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 02:31:03,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245708426] [2021-10-11 02:31:03,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:31:03,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703276699] [2021-10-11 02:31:03,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:03,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:03,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:03,305 INFO L87 Difference]: Start difference. First operand 22 states and 35 transitions. Second operand 3 states. [2021-10-11 02:31:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,312 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-10-11 02:31:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:03,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:31:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,314 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:31:03,314 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:31:03,315 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 02:31:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:31:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:31:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 32 transitions. [2021-10-11 02:31:03,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 32 transitions. Word has length 5 [2021-10-11 02:31:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,325 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 32 transitions. [2021-10-11 02:31:03,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 32 transitions. [2021-10-11 02:31:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:31:03,326 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:03,327 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 816096992, now seen corresponding path program 1 times [2021-10-11 02:31:03,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135128063] [2021-10-11 02:31:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,430 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 02:31:03,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135128063] [2021-10-11 02:31:03,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:03,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356394710] [2021-10-11 02:31:03,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:03,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,446 INFO L87 Difference]: Start difference. First operand 19 states and 32 transitions. Second operand 4 states. [2021-10-11 02:31:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,477 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2021-10-11 02:31:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:03,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:31:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,480 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:31:03,480 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:31:03,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:31:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2021-10-11 02:31:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2021-10-11 02:31:03,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 6 [2021-10-11 02:31:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,489 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 31 transitions. [2021-10-11 02:31:03,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 31 transitions. [2021-10-11 02:31:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:03,489 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:31:03,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,491 INFO L82 PathProgramCache]: Analyzing trace with hash -470582704, now seen corresponding path program 1 times [2021-10-11 02:31:03,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891084355] [2021-10-11 02:31:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,573 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 02:31:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891084355] [2021-10-11 02:31:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839508142] [2021-10-11 02:31:03,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,577 INFO L87 Difference]: Start difference. First operand 19 states and 31 transitions. Second operand 4 states. [2021-10-11 02:31:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,612 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-10-11 02:31:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:03,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:31:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,616 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:31:03,617 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 02:31:03,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 02:31:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2021-10-11 02:31:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2021-10-11 02:31:03,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 7 [2021-10-11 02:31:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,625 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2021-10-11 02:31:03,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2021-10-11 02:31:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:31:03,626 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:31:03,627 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1702947275, now seen corresponding path program 1 times [2021-10-11 02:31:03,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069932235] [2021-10-11 02:31:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,692 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 02:31:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069932235] [2021-10-11 02:31:03,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:03,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529813335] [2021-10-11 02:31:03,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:03,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:03,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,697 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2021-10-11 02:31:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,720 INFO L93 Difference]: Finished difference Result 31 states and 48 transitions. [2021-10-11 02:31:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:03,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:31:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,723 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:31:03,723 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:31:03,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:31:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-10-11 02:31:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2021-10-11 02:31:03,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 8 [2021-10-11 02:31:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,731 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2021-10-11 02:31:03,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2021-10-11 02:31:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:31:03,732 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:31:03,733 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1251542971, now seen corresponding path program 1 times [2021-10-11 02:31:03,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055111601] [2021-10-11 02:31:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,808 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 02:31:03,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055111601] [2021-10-11 02:31:03,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:03,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043121519] [2021-10-11 02:31:03,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:03,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,811 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand 4 states. [2021-10-11 02:31:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,838 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2021-10-11 02:31:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:03,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:31:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,839 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:31:03,841 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:31:03,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:31:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-10-11 02:31:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2021-10-11 02:31:03,846 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 9 [2021-10-11 02:31:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,849 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2021-10-11 02:31:03,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2021-10-11 02:31:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:31:03,850 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:31:03,851 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash -142911094, now seen corresponding path program 1 times [2021-10-11 02:31:03,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238336397] [2021-10-11 02:31:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,891 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 02:31:03,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238336397] [2021-10-11 02:31:03,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:03,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823682245] [2021-10-11 02:31:03,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:03,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:03,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,894 INFO L87 Difference]: Start difference. First operand 19 states and 28 transitions. Second operand 4 states. [2021-10-11 02:31:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,910 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2021-10-11 02:31:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:03,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:31:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,912 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:31:03,912 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 02:31:03,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 02:31:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-10-11 02:31:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2021-10-11 02:31:03,915 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 10 [2021-10-11 02:31:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,916 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2021-10-11 02:31:03,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2021-10-11 02:31:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:31:03,917 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:31:03,917 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash -135060934, now seen corresponding path program 1 times [2021-10-11 02:31:03,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926930095] [2021-10-11 02:31:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:03,957 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 02:31:03,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926930095] [2021-10-11 02:31:03,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:03,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:03,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084967515] [2021-10-11 02:31:03,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:03,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,960 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand 4 states. [2021-10-11 02:31:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:03,977 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-11 02:31:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:03,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:31:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:03,979 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:31:03,979 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:31:03,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:31:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-10-11 02:31:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2021-10-11 02:31:03,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2021-10-11 02:31:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:03,983 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-10-11 02:31:03,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:03,983 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2021-10-11 02:31:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:31:03,984 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:03,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:03,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:31:03,985 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:31:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 108294367, now seen corresponding path program 1 times [2021-10-11 02:31:03,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:03,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598647257] [2021-10-11 02:31:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:04,083 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 02:31:04,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598647257] [2021-10-11 02:31:04,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:04,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5162544] [2021-10-11 02:31:04,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:04,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:04,084 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 4 states. [2021-10-11 02:31:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:04,108 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2021-10-11 02:31:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:04,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:31:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:04,109 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:31:04,110 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:31:04,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:31:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:31:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:31:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:31:04,111 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-10-11 02:31:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:04,111 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:31:04,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:31:04,112 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:31:04,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:31:04,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:04 BoogieIcfgContainer [2021-10-11 02:31:04,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:04,124 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:04,124 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:04,125 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:04,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:02" (3/4) ... [2021-10-11 02:31:04,128 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:31:04,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-11 02:31:04,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:31:04,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:31:04,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:31:04,189 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d301900b-e643-46a3-9a94-83e15895c298/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:04,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:04,191 INFO L168 Benchmark]: Toolchain (without parser) took 2318.94 ms. Allocated memory was 100.7 MB in the beginning and 157.3 MB in the end (delta: 56.6 MB). Free memory was 63.5 MB in the beginning and 125.5 MB in the end (delta: -61.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:04,191 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 100.7 MB. Free memory is still 80.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:04,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.81 ms. Allocated memory is still 100.7 MB. Free memory was 63.4 MB in the beginning and 53.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:04,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.79 ms. Allocated memory is still 100.7 MB. Free memory was 53.3 MB in the beginning and 51.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:04,192 INFO L168 Benchmark]: Boogie Preprocessor took 23.46 ms. Allocated memory is still 100.7 MB. Free memory was 51.8 MB in the beginning and 50.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:04,193 INFO L168 Benchmark]: RCFGBuilder took 661.75 ms. Allocated memory was 100.7 MB in the beginning and 157.3 MB in the end (delta: 56.6 MB). Free memory was 50.6 MB in the beginning and 110.1 MB in the end (delta: -59.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:04,193 INFO L168 Benchmark]: TraceAbstraction took 1243.01 ms. Allocated memory is still 157.3 MB. Free memory was 109.5 MB in the beginning and 128.6 MB in the end (delta: -19.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:04,194 INFO L168 Benchmark]: Witness Printer took 64.78 ms. Allocated memory is still 157.3 MB. Free memory was 128.6 MB in the beginning and 125.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:04,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 100.7 MB. Free memory is still 80.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.81 ms. Allocated memory is still 100.7 MB. Free memory was 63.4 MB in the beginning and 53.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.79 ms. Allocated memory is still 100.7 MB. Free memory was 53.3 MB in the beginning and 51.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.46 ms. Allocated memory is still 100.7 MB. Free memory was 51.8 MB in the beginning and 50.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 661.75 ms. Allocated memory was 100.7 MB in the beginning and 157.3 MB in the end (delta: 56.6 MB). Free memory was 50.6 MB in the beginning and 110.1 MB in the end (delta: -59.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1243.01 ms. Allocated memory is still 157.3 MB. Free memory was 109.5 MB in the beginning and 128.6 MB in the end (delta: -19.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 64.78 ms. Allocated memory is still 157.3 MB. Free memory was 128.6 MB in the beginning and 125.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 121]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 183 SDslu, 257 SDs, 0 SdLazy, 63 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...