./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_12.c -s /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbb7e06bf350f46f725ea0ddc5d1215829061b3a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:56:41,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:56:41,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:56:41,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:56:41,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:56:41,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:56:41,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:56:41,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:56:41,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:56:41,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:56:41,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:56:41,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:56:41,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:56:41,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:56:41,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:56:41,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:56:41,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:56:41,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:56:41,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:56:41,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:56:41,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:56:41,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:56:41,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:56:41,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:56:41,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:56:41,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:56:41,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:56:41,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:56:41,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:56:41,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:56:41,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:56:41,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:56:41,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:56:41,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:56:41,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:56:41,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:56:41,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:56:41,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:56:41,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:56:41,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:56:41,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:56:41,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 18:56:41,357 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:56:41,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:56:41,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:56:41,358 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:56:41,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:56:41,358 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:56:41,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:56:41,359 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:56:41,359 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:56:41,359 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:56:41,359 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:56:41,359 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:56:41,359 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:56:41,359 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:56:41,360 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:56:41,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 18:56:41,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 18:56:41,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 18:56:41,361 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 18:56:41,362 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 18:56:41,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:56:41,362 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:56:41,362 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:56:41,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:56:41,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:56:41,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:56:41,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:56:41,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:56:41,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:56:41,363 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:56:41,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:56:41,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:56:41,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:56:41,364 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb7e06bf350f46f725ea0ddc5d1215829061b3a [2020-12-09 18:56:41,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:56:41,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:56:41,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:56:41,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:56:41,562 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:56:41,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_12.c [2020-12-09 18:56:41,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/data/bcba0154d/ce84773cd70443e19d59f3ca4de1604f/FLAGb632e1737 [2020-12-09 18:56:41,985 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:56:41,985 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/sv-benchmarks/c/locks/test_locks_12.c [2020-12-09 18:56:41,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/data/bcba0154d/ce84773cd70443e19d59f3ca4de1604f/FLAGb632e1737 [2020-12-09 18:56:42,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/data/bcba0154d/ce84773cd70443e19d59f3ca4de1604f [2020-12-09 18:56:42,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:56:42,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:56:42,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:56:42,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:56:42,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:56:42,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bd4df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42, skipping insertion in model container [2020-12-09 18:56:42,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:56:42,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:56:42,161 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2020-12-09 18:56:42,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:56:42,173 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:56:42,196 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2020-12-09 18:56:42,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:56:42,211 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:56:42,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42 WrapperNode [2020-12-09 18:56:42,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:56:42,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:56:42,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:56:42,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:56:42,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:56:42,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:56:42,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:56:42,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:56:42,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... [2020-12-09 18:56:42,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:56:42,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:56:42,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:56:42,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:56:42,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:56:42,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:56:42,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:56:42,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:56:42,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:56:42,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:56:42,691 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 18:56:42,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:56:42 BoogieIcfgContainer [2020-12-09 18:56:42,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:56:42,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:56:42,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:56:42,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:56:42,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:56:42" (1/3) ... [2020-12-09 18:56:42,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32234d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:56:42, skipping insertion in model container [2020-12-09 18:56:42,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:56:42" (2/3) ... [2020-12-09 18:56:42,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32234d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:56:42, skipping insertion in model container [2020-12-09 18:56:42,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:56:42" (3/3) ... [2020-12-09 18:56:42,700 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-12-09 18:56:42,710 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:56:42,712 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 18:56:42,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 18:56:42,734 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:56:42,734 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 18:56:42,734 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:56:42,734 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:56:42,734 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:56:42,734 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:56:42,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:56:42,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:56:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 18:56:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 18:56:42,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:42,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 18:56:42,748 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:42,752 INFO L82 PathProgramCache]: Analyzing trace with hash 8076690, now seen corresponding path program 1 times [2020-12-09 18:56:42,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:42,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245560533] [2020-12-09 18:56:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:42,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245560533] [2020-12-09 18:56:42,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:42,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:56:42,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126172620] [2020-12-09 18:56:42,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 18:56:42,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 18:56:42,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:56:42,888 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 18:56:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:42,897 INFO L93 Difference]: Finished difference Result 33 states and 56 transitions. [2020-12-09 18:56:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 18:56:42,898 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 18:56:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:42,904 INFO L225 Difference]: With dead ends: 33 [2020-12-09 18:56:42,904 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 18:56:42,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:56:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 18:56:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 18:56:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 18:56:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 55 transitions. [2020-12-09 18:56:42,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 55 transitions. Word has length 4 [2020-12-09 18:56:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:42,930 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 55 transitions. [2020-12-09 18:56:42,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 18:56:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 55 transitions. [2020-12-09 18:56:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 18:56:42,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:42,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 18:56:42,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:56:42,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 243234351, now seen corresponding path program 1 times [2020-12-09 18:56:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:42,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222143472] [2020-12-09 18:56:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:42,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222143472] [2020-12-09 18:56:42,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:42,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 18:56:42,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901276286] [2020-12-09 18:56:42,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:56:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:56:42,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:56:42,969 INFO L87 Difference]: Start difference. First operand 32 states and 55 transitions. Second operand 3 states. [2020-12-09 18:56:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:42,973 INFO L93 Difference]: Finished difference Result 31 states and 54 transitions. [2020-12-09 18:56:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:56:42,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 18:56:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:42,974 INFO L225 Difference]: With dead ends: 31 [2020-12-09 18:56:42,974 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 18:56:42,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:56:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 18:56:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 18:56:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 52 transitions. [2020-12-09 18:56:42,978 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 52 transitions. Word has length 5 [2020-12-09 18:56:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:42,978 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 52 transitions. [2020-12-09 18:56:42,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:56:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 52 transitions. [2020-12-09 18:56:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 18:56:42,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:42,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 18:56:42,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:56:42,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1042532479, now seen corresponding path program 1 times [2020-12-09 18:56:42,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:42,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875318984] [2020-12-09 18:56:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875318984] [2020-12-09 18:56:43,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317683367] [2020-12-09 18:56:43,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,027 INFO L87 Difference]: Start difference. First operand 29 states and 52 transitions. Second operand 4 states. [2020-12-09 18:56:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,048 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2020-12-09 18:56:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 18:56:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,049 INFO L225 Difference]: With dead ends: 55 [2020-12-09 18:56:43,049 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 18:56:43,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 18:56:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2020-12-09 18:56:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 51 transitions. [2020-12-09 18:56:43,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 51 transitions. Word has length 6 [2020-12-09 18:56:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,054 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 51 transitions. [2020-12-09 18:56:43,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 51 transitions. [2020-12-09 18:56:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 18:56:43,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:56:43,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2041444219, now seen corresponding path program 1 times [2020-12-09 18:56:43,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488820109] [2020-12-09 18:56:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488820109] [2020-12-09 18:56:43,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299892846] [2020-12-09 18:56:43,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,093 INFO L87 Difference]: Start difference. First operand 29 states and 51 transitions. Second operand 4 states. [2020-12-09 18:56:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,109 INFO L93 Difference]: Finished difference Result 53 states and 93 transitions. [2020-12-09 18:56:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 18:56:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,110 INFO L225 Difference]: With dead ends: 53 [2020-12-09 18:56:43,110 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 18:56:43,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 18:56:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2020-12-09 18:56:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 50 transitions. [2020-12-09 18:56:43,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 50 transitions. Word has length 7 [2020-12-09 18:56:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,114 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 50 transitions. [2020-12-09 18:56:43,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 50 transitions. [2020-12-09 18:56:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 18:56:43,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:56:43,114 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1139525610, now seen corresponding path program 1 times [2020-12-09 18:56:43,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427553343] [2020-12-09 18:56:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427553343] [2020-12-09 18:56:43,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138679569] [2020-12-09 18:56:43,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,150 INFO L87 Difference]: Start difference. First operand 29 states and 50 transitions. Second operand 4 states. [2020-12-09 18:56:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,175 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2020-12-09 18:56:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 18:56:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,176 INFO L225 Difference]: With dead ends: 51 [2020-12-09 18:56:43,177 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 18:56:43,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 18:56:43,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2020-12-09 18:56:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 49 transitions. [2020-12-09 18:56:43,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 49 transitions. Word has length 8 [2020-12-09 18:56:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,182 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 49 transitions. [2020-12-09 18:56:43,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 49 transitions. [2020-12-09 18:56:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 18:56:43,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:56:43,183 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash -965342160, now seen corresponding path program 1 times [2020-12-09 18:56:43,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352052453] [2020-12-09 18:56:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352052453] [2020-12-09 18:56:43,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266966297] [2020-12-09 18:56:43,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,221 INFO L87 Difference]: Start difference. First operand 29 states and 49 transitions. Second operand 4 states. [2020-12-09 18:56:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,235 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2020-12-09 18:56:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 18:56:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,236 INFO L225 Difference]: With dead ends: 49 [2020-12-09 18:56:43,237 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 18:56:43,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 18:56:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 29. [2020-12-09 18:56:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 48 transitions. [2020-12-09 18:56:43,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 48 transitions. Word has length 9 [2020-12-09 18:56:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,240 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 48 transitions. [2020-12-09 18:56:43,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 48 transitions. [2020-12-09 18:56:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 18:56:43,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:56:43,241 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,241 INFO L82 PathProgramCache]: Analyzing trace with hash 139377835, now seen corresponding path program 1 times [2020-12-09 18:56:43,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141395588] [2020-12-09 18:56:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141395588] [2020-12-09 18:56:43,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154356167] [2020-12-09 18:56:43,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,275 INFO L87 Difference]: Start difference. First operand 29 states and 48 transitions. Second operand 4 states. [2020-12-09 18:56:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,289 INFO L93 Difference]: Finished difference Result 47 states and 78 transitions. [2020-12-09 18:56:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 18:56:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,290 INFO L225 Difference]: With dead ends: 47 [2020-12-09 18:56:43,290 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 18:56:43,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 18:56:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2020-12-09 18:56:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 47 transitions. [2020-12-09 18:56:43,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 47 transitions. Word has length 10 [2020-12-09 18:56:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,293 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 47 transitions. [2020-12-09 18:56:43,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 47 transitions. [2020-12-09 18:56:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:56:43,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:56:43,294 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash 25959653, now seen corresponding path program 1 times [2020-12-09 18:56:43,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027954344] [2020-12-09 18:56:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027954344] [2020-12-09 18:56:43,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084340306] [2020-12-09 18:56:43,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,326 INFO L87 Difference]: Start difference. First operand 29 states and 47 transitions. Second operand 4 states. [2020-12-09 18:56:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,340 INFO L93 Difference]: Finished difference Result 45 states and 73 transitions. [2020-12-09 18:56:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 18:56:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,341 INFO L225 Difference]: With dead ends: 45 [2020-12-09 18:56:43,341 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 18:56:43,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 18:56:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2020-12-09 18:56:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2020-12-09 18:56:43,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 11 [2020-12-09 18:56:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,344 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 46 transitions. [2020-12-09 18:56:43,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 46 transitions. [2020-12-09 18:56:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 18:56:43,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 18:56:43,345 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash 804963648, now seen corresponding path program 1 times [2020-12-09 18:56:43,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414323364] [2020-12-09 18:56:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414323364] [2020-12-09 18:56:43,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349986331] [2020-12-09 18:56:43,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,376 INFO L87 Difference]: Start difference. First operand 29 states and 46 transitions. Second operand 4 states. [2020-12-09 18:56:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,392 INFO L93 Difference]: Finished difference Result 43 states and 68 transitions. [2020-12-09 18:56:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 18:56:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,393 INFO L225 Difference]: With dead ends: 43 [2020-12-09 18:56:43,393 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 18:56:43,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 18:56:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-12-09 18:56:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 45 transitions. [2020-12-09 18:56:43,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 45 transitions. Word has length 12 [2020-12-09 18:56:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,396 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 45 transitions. [2020-12-09 18:56:43,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 45 transitions. [2020-12-09 18:56:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 18:56:43,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:56:43,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -815715942, now seen corresponding path program 1 times [2020-12-09 18:56:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901935518] [2020-12-09 18:56:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901935518] [2020-12-09 18:56:43,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140521695] [2020-12-09 18:56:43,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,426 INFO L87 Difference]: Start difference. First operand 29 states and 45 transitions. Second operand 4 states. [2020-12-09 18:56:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,439 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2020-12-09 18:56:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 18:56:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,440 INFO L225 Difference]: With dead ends: 41 [2020-12-09 18:56:43,440 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 18:56:43,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 18:56:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-12-09 18:56:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2020-12-09 18:56:43,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 13 [2020-12-09 18:56:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,443 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2020-12-09 18:56:43,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2020-12-09 18:56:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 18:56:43,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 18:56:43,444 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash 482824661, now seen corresponding path program 1 times [2020-12-09 18:56:43,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782915831] [2020-12-09 18:56:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782915831] [2020-12-09 18:56:43,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452451309] [2020-12-09 18:56:43,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,472 INFO L87 Difference]: Start difference. First operand 29 states and 44 transitions. Second operand 4 states. [2020-12-09 18:56:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,487 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2020-12-09 18:56:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 18:56:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,489 INFO L225 Difference]: With dead ends: 39 [2020-12-09 18:56:43,489 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 18:56:43,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 18:56:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-12-09 18:56:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 43 transitions. [2020-12-09 18:56:43,492 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 43 transitions. Word has length 14 [2020-12-09 18:56:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,492 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 43 transitions. [2020-12-09 18:56:43,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 43 transitions. [2020-12-09 18:56:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 18:56:43,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:56:43,493 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2082878031, now seen corresponding path program 1 times [2020-12-09 18:56:43,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730558584] [2020-12-09 18:56:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730558584] [2020-12-09 18:56:43,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841277991] [2020-12-09 18:56:43,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,519 INFO L87 Difference]: Start difference. First operand 29 states and 43 transitions. Second operand 4 states. [2020-12-09 18:56:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,532 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2020-12-09 18:56:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 18:56:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,533 INFO L225 Difference]: With dead ends: 37 [2020-12-09 18:56:43,533 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 18:56:43,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 18:56:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-12-09 18:56:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2020-12-09 18:56:43,536 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 15 [2020-12-09 18:56:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,536 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2020-12-09 18:56:43,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2020-12-09 18:56:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 18:56:43,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 18:56:43,537 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 144925290, now seen corresponding path program 1 times [2020-12-09 18:56:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160445000] [2020-12-09 18:56:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160445000] [2020-12-09 18:56:43,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961654048] [2020-12-09 18:56:43,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,571 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand 4 states. [2020-12-09 18:56:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,584 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2020-12-09 18:56:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 18:56:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,585 INFO L225 Difference]: With dead ends: 35 [2020-12-09 18:56:43,585 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 18:56:43,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 18:56:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-12-09 18:56:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:56:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2020-12-09 18:56:43,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 16 [2020-12-09 18:56:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,588 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2020-12-09 18:56:43,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2020-12-09 18:56:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 18:56:43,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:56:43,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:56:43,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 18:56:43,589 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 18:56:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:56:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash 197932804, now seen corresponding path program 1 times [2020-12-09 18:56:43,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:56:43,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952830823] [2020-12-09 18:56:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:56:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:56:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:56:43,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952830823] [2020-12-09 18:56:43,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:56:43,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:56:43,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422181708] [2020-12-09 18:56:43,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:56:43,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:56:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:56:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,622 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand 4 states. [2020-12-09 18:56:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:56:43,633 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2020-12-09 18:56:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:56:43,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 18:56:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:56:43,634 INFO L225 Difference]: With dead ends: 29 [2020-12-09 18:56:43,634 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:56:43,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:56:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:56:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:56:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:56:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:56:43,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-09 18:56:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:56:43,635 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:56:43,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:56:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:56:43,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:56:43,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 18:56:43,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:56:43 BoogieIcfgContainer [2020-12-09 18:56:43,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:56:43,638 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:56:43,638 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:56:43,639 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:56:43,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:56:42" (3/4) ... [2020-12-09 18:56:43,641 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:56:43,649 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-12-09 18:56:43,650 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 18:56:43,650 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-09 18:56:43,650 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 18:56:43,691 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_35297976-4d08-4c28-abac-bec48f94b954/bin/utaipan/witness.graphml [2020-12-09 18:56:43,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:56:43,692 INFO L168 Benchmark]: Toolchain (without parser) took 1685.60 ms. Allocated memory was 109.1 MB in the beginning and 163.6 MB in the end (delta: 54.5 MB). Free memory was 84.5 MB in the beginning and 126.7 MB in the end (delta: -42.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:56:43,692 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 109.1 MB. Free memory is still 73.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:56:43,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.36 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 84.7 MB in the end (delta: -489.7 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:56:43,693 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.13 ms. Allocated memory is still 109.1 MB. Free memory was 84.7 MB in the beginning and 82.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:56:43,693 INFO L168 Benchmark]: Boogie Preprocessor took 23.47 ms. Allocated memory is still 109.1 MB. Free memory was 82.9 MB in the beginning and 81.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:56:43,693 INFO L168 Benchmark]: RCFGBuilder took 421.81 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 84.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:56:43,693 INFO L168 Benchmark]: TraceAbstraction took 942.98 ms. Allocated memory was 109.1 MB in the beginning and 163.6 MB in the end (delta: 54.5 MB). Free memory was 83.5 MB in the beginning and 130.9 MB in the end (delta: -47.4 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:56:43,694 INFO L168 Benchmark]: Witness Printer took 52.30 ms. Allocated memory is still 163.6 MB. Free memory was 130.9 MB in the beginning and 126.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:56:43,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 109.1 MB. Free memory is still 73.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 205.36 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 84.7 MB in the end (delta: -489.7 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.13 ms. Allocated memory is still 109.1 MB. Free memory was 84.7 MB in the beginning and 82.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.47 ms. Allocated memory is still 109.1 MB. Free memory was 82.9 MB in the beginning and 81.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 421.81 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 84.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 942.98 ms. Allocated memory was 109.1 MB in the beginning and 163.6 MB in the end (delta: 54.5 MB). Free memory was 83.5 MB in the beginning and 130.9 MB in the end (delta: -47.4 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Witness Printer took 52.30 ms. Allocated memory is still 163.6 MB. Free memory was 130.9 MB in the beginning and 126.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 631 SDtfs, 493 SDslu, 772 SDs, 0 SdLazy, 108 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 176 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 7547 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...