./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG --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 12c3feea735c5360de013afbcf9aaa3880d39f75cbb7661493cccf003151044d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:35:07,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:35:07,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:35:07,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:35:07,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:35:07,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:35:07,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:35:07,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:35:07,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:35:07,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:35:07,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:35:07,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:35:07,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:35:07,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:35:07,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:35:07,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:35:07,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:35:07,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:35:07,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:35:07,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:35:07,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:35:07,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:35:07,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:35:07,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:35:07,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:35:07,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:35:07,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:35:07,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:35:07,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:35:07,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:35:07,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:35:07,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:35:07,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:35:07,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:35:07,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:35:07,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:35:07,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:35:07,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:35:07,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:35:07,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:35:07,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:35:07,313 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-29 04:35:07,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:35:07,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:35:07,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:35:07,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:35:07,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:35:07,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:35:07,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:35:07,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:35:07,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:35:07,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:35:07,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:35:07,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:35:07,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:35:07,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:35:07,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:35:07,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 04:35:07,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 04:35:07,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:35:07,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:35:07,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 04:35:07,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:35:07,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:35:07,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:35:07,389 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 04:35:07,389 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 04:35:07,389 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 04:35:07,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:35:07,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:35:07,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:35:07,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:35:07,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:35:07,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:35:07,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:35:07,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:35:07,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:35:07,392 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:35:07,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:35:07,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:35:07,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:35:07,393 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_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12c3feea735c5360de013afbcf9aaa3880d39f75cbb7661493cccf003151044d [2021-10-29 04:35:07,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:35:07,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:35:07,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:35:07,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:35:07,765 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:35:07,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/locks/test_locks_12.c [2021-10-29 04:35:07,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/data/1d052b07b/1788ec8808964b9595edb25add1d99ac/FLAGd69196a9e [2021-10-29 04:35:08,471 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:35:08,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/sv-benchmarks/c/locks/test_locks_12.c [2021-10-29 04:35:08,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/data/1d052b07b/1788ec8808964b9595edb25add1d99ac/FLAGd69196a9e [2021-10-29 04:35:08,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/data/1d052b07b/1788ec8808964b9595edb25add1d99ac [2021-10-29 04:35:08,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:35:08,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:35:08,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:35:08,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:35:08,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:35:08,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:35:08" (1/1) ... [2021-10-29 04:35:08,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815ba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:08, skipping insertion in model container [2021-10-29 04:35:08,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:35:08" (1/1) ... [2021-10-29 04:35:08,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:35:08,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:35:09,116 WARN L228 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_061506e5-6598-45bc-b617-272dd6bf2328/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2021-10-29 04:35:09,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:35:09,130 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:35:09,163 WARN L228 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_061506e5-6598-45bc-b617-272dd6bf2328/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2021-10-29 04:35:09,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:35:09,183 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:35:09,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09 WrapperNode [2021-10-29 04:35:09,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:35:09,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:35:09,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:35:09,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:35:09,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:35:09,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:35:09,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:35:09,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:35:09,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:35:09,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:35:09,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:35:09,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:35:09,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (1/1) ... [2021-10-29 04:35:09,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:35:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:09,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:35:09,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:35:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:35:09,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:35:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:35:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:35:10,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:35:10,203 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-29 04:35:10,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:35:10 BoogieIcfgContainer [2021-10-29 04:35:10,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:35:10,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:35:10,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:35:10,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:35:10,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:35:08" (1/3) ... [2021-10-29 04:35:10,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491606d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:35:10, skipping insertion in model container [2021-10-29 04:35:10,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:09" (2/3) ... [2021-10-29 04:35:10,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491606d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:35:10, skipping insertion in model container [2021-10-29 04:35:10,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:35:10" (3/3) ... [2021-10-29 04:35:10,232 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2021-10-29 04:35:10,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:35:10,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-29 04:35:10,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:35:10,380 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 04:35:10,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-29 04:35:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 04:35:10,419 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:10,420 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 04:35:10,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 8071885, now seen corresponding path program 1 times [2021-10-29 04:35:10,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:10,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156639192] [2021-10-29 04:35:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:10,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:10,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:10,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156639192] [2021-10-29 04:35:10,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156639192] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:10,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:10,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:35:10,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379554523] [2021-10-29 04:35:10,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 04:35:10,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 04:35:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:35:10,753 INFO L87 Difference]: Start difference. First operand has 33 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:10,774 INFO L93 Difference]: Finished difference Result 33 states and 56 transitions. [2021-10-29 04:35:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 04:35:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-29 04:35:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:10,829 INFO L225 Difference]: With dead ends: 33 [2021-10-29 04:35:10,830 INFO L226 Difference]: Without dead ends: 32 [2021-10-29 04:35:10,846 INFO L786 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 [2021-10-29 04:35:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-29 04:35:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-29 04:35:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 55 transitions. [2021-10-29 04:35:10,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 55 transitions. Word has length 4 [2021-10-29 04:35:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:10,910 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 55 transitions. [2021-10-29 04:35:10,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 55 transitions. [2021-10-29 04:35:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 04:35:10,912 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:10,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 04:35:10,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:35:10,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:10,922 INFO L85 PathProgramCache]: Analyzing trace with hash 243234351, now seen corresponding path program 1 times [2021-10-29 04:35:10,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:10,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190749473] [2021-10-29 04:35:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:10,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190749473] [2021-10-29 04:35:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190749473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-29 04:35:11,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912451923] [2021-10-29 04:35:11,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:35:11,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:35:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:35:11,050 INFO L87 Difference]: Start difference. First operand 32 states and 55 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,058 INFO L93 Difference]: Finished difference Result 31 states and 54 transitions. [2021-10-29 04:35:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:35:11,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 04:35:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,060 INFO L225 Difference]: With dead ends: 31 [2021-10-29 04:35:11,060 INFO L226 Difference]: Without dead ends: 29 [2021-10-29 04:35:11,061 INFO L786 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 [2021-10-29 04:35:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-29 04:35:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-29 04:35:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 52 transitions. [2021-10-29 04:35:11,073 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 52 transitions. Word has length 5 [2021-10-29 04:35:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,074 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 52 transitions. [2021-10-29 04:35:11,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 52 transitions. [2021-10-29 04:35:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 04:35:11,076 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,076 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 04:35:11,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1042532479, now seen corresponding path program 1 times [2021-10-29 04:35:11,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440480491] [2021-10-29 04:35:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440480491] [2021-10-29 04:35:11,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440480491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192752132] [2021-10-29 04:35:11,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,256 INFO L87 Difference]: Start difference. First operand 29 states and 52 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,321 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-10-29 04:35:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-29 04:35:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,333 INFO L225 Difference]: With dead ends: 55 [2021-10-29 04:35:11,334 INFO L226 Difference]: Without dead ends: 55 [2021-10-29 04:35:11,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-29 04:35:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2021-10-29 04:35:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 51 transitions. [2021-10-29 04:35:11,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 51 transitions. Word has length 6 [2021-10-29 04:35:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,348 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 51 transitions. [2021-10-29 04:35:11,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 51 transitions. [2021-10-29 04:35:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 04:35:11,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 04:35:11,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2041444219, now seen corresponding path program 1 times [2021-10-29 04:35:11,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986535699] [2021-10-29 04:35:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986535699] [2021-10-29 04:35:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986535699] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740329723] [2021-10-29 04:35:11,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,489 INFO L87 Difference]: Start difference. First operand 29 states and 51 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,517 INFO L93 Difference]: Finished difference Result 53 states and 93 transitions. [2021-10-29 04:35:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-29 04:35:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,520 INFO L225 Difference]: With dead ends: 53 [2021-10-29 04:35:11,520 INFO L226 Difference]: Without dead ends: 53 [2021-10-29 04:35:11,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-29 04:35:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2021-10-29 04:35:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 50 transitions. [2021-10-29 04:35:11,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 50 transitions. Word has length 7 [2021-10-29 04:35:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,527 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 50 transitions. [2021-10-29 04:35:11,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 50 transitions. [2021-10-29 04:35:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 04:35:11,529 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 04:35:11,530 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1139525610, now seen corresponding path program 1 times [2021-10-29 04:35:11,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249320942] [2021-10-29 04:35:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249320942] [2021-10-29 04:35:11,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249320942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535204164] [2021-10-29 04:35:11,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,609 INFO L87 Difference]: Start difference. First operand 29 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,635 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-10-29 04:35:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 04:35:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,637 INFO L225 Difference]: With dead ends: 51 [2021-10-29 04:35:11,637 INFO L226 Difference]: Without dead ends: 51 [2021-10-29 04:35:11,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-29 04:35:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-10-29 04:35:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 49 transitions. [2021-10-29 04:35:11,643 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 49 transitions. Word has length 8 [2021-10-29 04:35:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,644 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 49 transitions. [2021-10-29 04:35:11,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 49 transitions. [2021-10-29 04:35:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 04:35:11,645 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 04:35:11,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash -965342160, now seen corresponding path program 1 times [2021-10-29 04:35:11,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663435930] [2021-10-29 04:35:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663435930] [2021-10-29 04:35:11,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663435930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580209657] [2021-10-29 04:35:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,705 INFO L87 Difference]: Start difference. First operand 29 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,729 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2021-10-29 04:35:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-29 04:35:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,731 INFO L225 Difference]: With dead ends: 49 [2021-10-29 04:35:11,731 INFO L226 Difference]: Without dead ends: 49 [2021-10-29 04:35:11,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-29 04:35:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 29. [2021-10-29 04:35:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 48 transitions. [2021-10-29 04:35:11,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 48 transitions. Word has length 9 [2021-10-29 04:35:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,738 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 48 transitions. [2021-10-29 04:35:11,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 48 transitions. [2021-10-29 04:35:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 04:35:11,739 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,740 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 04:35:11,740 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,741 INFO L85 PathProgramCache]: Analyzing trace with hash 139377835, now seen corresponding path program 1 times [2021-10-29 04:35:11,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685573551] [2021-10-29 04:35:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685573551] [2021-10-29 04:35:11,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685573551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508723944] [2021-10-29 04:35:11,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,805 INFO L87 Difference]: Start difference. First operand 29 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,827 INFO L93 Difference]: Finished difference Result 47 states and 78 transitions. [2021-10-29 04:35:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 04:35:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,829 INFO L225 Difference]: With dead ends: 47 [2021-10-29 04:35:11,829 INFO L226 Difference]: Without dead ends: 47 [2021-10-29 04:35:11,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-29 04:35:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2021-10-29 04:35:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 47 transitions. [2021-10-29 04:35:11,834 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 47 transitions. Word has length 10 [2021-10-29 04:35:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,835 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 47 transitions. [2021-10-29 04:35:11,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 47 transitions. [2021-10-29 04:35:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 04:35:11,836 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,836 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 04:35:11,836 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash 25959653, now seen corresponding path program 1 times [2021-10-29 04:35:11,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010079455] [2021-10-29 04:35:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010079455] [2021-10-29 04:35:11,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010079455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130313071] [2021-10-29 04:35:11,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,893 INFO L87 Difference]: Start difference. First operand 29 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:11,923 INFO L93 Difference]: Finished difference Result 45 states and 73 transitions. [2021-10-29 04:35:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-29 04:35:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:11,925 INFO L225 Difference]: With dead ends: 45 [2021-10-29 04:35:11,925 INFO L226 Difference]: Without dead ends: 45 [2021-10-29 04:35:11,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-29 04:35:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-10-29 04:35:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2021-10-29 04:35:11,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 11 [2021-10-29 04:35:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:11,938 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 46 transitions. [2021-10-29 04:35:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 46 transitions. [2021-10-29 04:35:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 04:35:11,940 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:11,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:11,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 04:35:11,941 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 804963648, now seen corresponding path program 1 times [2021-10-29 04:35:11,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:11,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84959787] [2021-10-29 04:35:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:11,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:11,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:11,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84959787] [2021-10-29 04:35:11,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84959787] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:11,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:11,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:11,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363021363] [2021-10-29 04:35:11,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:11,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:11,998 INFO L87 Difference]: Start difference. First operand 29 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:12,017 INFO L93 Difference]: Finished difference Result 43 states and 68 transitions. [2021-10-29 04:35:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-29 04:35:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:12,019 INFO L225 Difference]: With dead ends: 43 [2021-10-29 04:35:12,019 INFO L226 Difference]: Without dead ends: 43 [2021-10-29 04:35:12,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-29 04:35:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-10-29 04:35:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 45 transitions. [2021-10-29 04:35:12,023 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 45 transitions. Word has length 12 [2021-10-29 04:35:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:12,024 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 45 transitions. [2021-10-29 04:35:12,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 45 transitions. [2021-10-29 04:35:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-29 04:35:12,025 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:12,025 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:12,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 04:35:12,025 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:12,026 INFO L85 PathProgramCache]: Analyzing trace with hash -815715942, now seen corresponding path program 1 times [2021-10-29 04:35:12,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:12,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738107258] [2021-10-29 04:35:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:12,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:12,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:12,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738107258] [2021-10-29 04:35:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738107258] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:12,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:12,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:12,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068435815] [2021-10-29 04:35:12,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:12,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,099 INFO L87 Difference]: Start difference. First operand 29 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:12,122 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2021-10-29 04:35:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-29 04:35:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:12,124 INFO L225 Difference]: With dead ends: 41 [2021-10-29 04:35:12,124 INFO L226 Difference]: Without dead ends: 41 [2021-10-29 04:35:12,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-29 04:35:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2021-10-29 04:35:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2021-10-29 04:35:12,136 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 13 [2021-10-29 04:35:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:12,137 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2021-10-29 04:35:12,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2021-10-29 04:35:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 04:35:12,139 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:12,139 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:12,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-29 04:35:12,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash 482824661, now seen corresponding path program 1 times [2021-10-29 04:35:12,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:12,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221423681] [2021-10-29 04:35:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:12,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:12,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:12,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221423681] [2021-10-29 04:35:12,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221423681] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:12,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:12,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:12,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335972036] [2021-10-29 04:35:12,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:12,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,229 INFO L87 Difference]: Start difference. First operand 29 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:12,253 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-10-29 04:35:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:12,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-29 04:35:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:12,255 INFO L225 Difference]: With dead ends: 39 [2021-10-29 04:35:12,255 INFO L226 Difference]: Without dead ends: 39 [2021-10-29 04:35:12,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-29 04:35:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-10-29 04:35:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 43 transitions. [2021-10-29 04:35:12,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 43 transitions. Word has length 14 [2021-10-29 04:35:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:12,262 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 43 transitions. [2021-10-29 04:35:12,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 43 transitions. [2021-10-29 04:35:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 04:35:12,263 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:12,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:12,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-29 04:35:12,265 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2082878031, now seen corresponding path program 1 times [2021-10-29 04:35:12,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:12,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117848617] [2021-10-29 04:35:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:12,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:12,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:12,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117848617] [2021-10-29 04:35:12,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117848617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:12,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:12,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:12,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122396667] [2021-10-29 04:35:12,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:12,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,354 INFO L87 Difference]: Start difference. First operand 29 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:12,375 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-10-29 04:35:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:12,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-29 04:35:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:12,379 INFO L225 Difference]: With dead ends: 37 [2021-10-29 04:35:12,379 INFO L226 Difference]: Without dead ends: 37 [2021-10-29 04:35:12,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-29 04:35:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-29 04:35:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2021-10-29 04:35:12,394 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 15 [2021-10-29 04:35:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:12,397 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2021-10-29 04:35:12,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2021-10-29 04:35:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 04:35:12,400 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:12,400 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:12,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-29 04:35:12,401 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 144925290, now seen corresponding path program 1 times [2021-10-29 04:35:12,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:12,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929399687] [2021-10-29 04:35:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:12,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:12,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:12,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929399687] [2021-10-29 04:35:12,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929399687] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:12,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:12,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:12,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406486599] [2021-10-29 04:35:12,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:12,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:12,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,447 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:12,465 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-10-29 04:35:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-29 04:35:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:12,467 INFO L225 Difference]: With dead ends: 35 [2021-10-29 04:35:12,467 INFO L226 Difference]: Without dead ends: 35 [2021-10-29 04:35:12,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-29 04:35:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-10-29 04:35:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-10-29 04:35:12,471 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 16 [2021-10-29 04:35:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:12,471 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-10-29 04:35:12,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-10-29 04:35:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-29 04:35:12,473 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:12,473 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:12,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-29 04:35:12,473 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-29 04:35:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash 197932804, now seen corresponding path program 1 times [2021-10-29 04:35:12,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:12,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152539733] [2021-10-29 04:35:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:12,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:12,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:12,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152539733] [2021-10-29 04:35:12,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152539733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:12,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:12,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:12,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776494734] [2021-10-29 04:35:12,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:12,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:12,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,519 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:12,540 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2021-10-29 04:35:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-29 04:35:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:12,543 INFO L225 Difference]: With dead ends: 29 [2021-10-29 04:35:12,544 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 04:35:12,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 04:35:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 04:35:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 04:35:12,546 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-29 04:35:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 04:35:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 04:35:12,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 04:35:12,551 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 04:35:12,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 04:35:12,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-29 04:35:12,556 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:12,558 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:35:12,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:35:12 BoogieIcfgContainer [2021-10-29 04:35:12,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:35:12,563 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:35:12,563 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:35:12,563 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:35:12,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:35:10" (3/4) ... [2021-10-29 04:35:12,568 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 04:35:12,587 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-29 04:35:12,588 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-29 04:35:12,589 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-29 04:35:12,590 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 04:35:12,675 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:35:12,675 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:35:12,677 INFO L168 Benchmark]: Toolchain (without parser) took 3860.43 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 62.1 MB in the beginning and 60.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:12,678 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 102.8 MB. Free memory is still 78.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:35:12,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.49 ms. Allocated memory is still 102.8 MB. Free memory was 61.9 MB in the beginning and 78.0 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:12,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.14 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 76.3 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:35:12,680 INFO L168 Benchmark]: Boogie Preprocessor took 32.43 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 75.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:12,680 INFO L168 Benchmark]: RCFGBuilder took 937.90 ms. Allocated memory is still 102.8 MB. Free memory was 74.7 MB in the beginning and 51.7 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:12,684 INFO L168 Benchmark]: TraceAbstraction took 2352.87 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 50.8 MB in the beginning and 65.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:12,684 INFO L168 Benchmark]: Witness Printer took 112.48 ms. Allocated memory is still 123.7 MB. Free memory was 64.7 MB in the beginning and 60.4 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:12,690 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 102.8 MB. Free memory is still 78.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.49 ms. Allocated memory is still 102.8 MB. Free memory was 61.9 MB in the beginning and 78.0 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.14 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 76.3 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.43 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 75.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 937.90 ms. Allocated memory is still 102.8 MB. Free memory was 74.7 MB in the beginning and 51.7 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2352.87 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 50.8 MB in the beginning and 65.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Witness Printer took 112.48 ms. Allocated memory is still 123.7 MB. Free memory was 64.7 MB in the beginning and 60.4 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 191]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 631 SDtfs, 493 SDslu, 782 SDs, 0 SdLazy, 128 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 53, 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, 14 MinimizatonAttempts, 176 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 633 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-29 04:35:12,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061506e5-6598-45bc-b617-272dd6bf2328/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...