./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_8.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_8.c -s /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/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 37d0ed05d77a0379c9ed98058bf2f327252773ce .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:39:11,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:39:11,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:39:12,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:39:12,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:39:12,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:39:12,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:39:12,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:39:12,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:39:12,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:39:12,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:39:12,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:39:12,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:39:12,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:39:12,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:39:12,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:39:12,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:39:12,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:39:12,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:39:12,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:39:12,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:39:12,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:39:12,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:39:12,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:39:12,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:39:12,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:39:12,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:39:12,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:39:12,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:39:12,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:39:12,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:39:12,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:39:12,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:39:12,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:39:12,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:39:12,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:39:12,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:39:12,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:39:12,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:39:12,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:39:12,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:39:12,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:39:12,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:39:12,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:39:12,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:39:12,183 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:39:12,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:39:12,184 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:39:12,184 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:39:12,184 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:39:12,185 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:39:12,185 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:39:12,186 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:39:12,186 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:39:12,186 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:39:12,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:39:12,187 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:39:12,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:39:12,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:39:12,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:39:12,188 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:39:12,188 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:39:12,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:39:12,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:39:12,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:39:12,189 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:39:12,189 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:39:12,189 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:39:12,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:39:12,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:39:12,192 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:39:12,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:39:12,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:39:12,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:39:12,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:39:12,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:12,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:39:12,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:39:12,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:39:12,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:39:12,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:39:12,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:39:12,194 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_92dc34e8-67f0-48da-9c12-bd92518930ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37d0ed05d77a0379c9ed98058bf2f327252773ce [2020-11-28 07:39:12,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:12,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:12,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:12,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:12,536 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:12,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_8.c [2020-11-28 07:39:12,619 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/data/9043c6606/cb0c0fa718104d8098fb46b085db87e6/FLAGa0858020b [2020-11-28 07:39:13,086 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:13,087 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/sv-benchmarks/c/locks/test_locks_8.c [2020-11-28 07:39:13,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/data/9043c6606/cb0c0fa718104d8098fb46b085db87e6/FLAGa0858020b [2020-11-28 07:39:13,470 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/data/9043c6606/cb0c0fa718104d8098fb46b085db87e6 [2020-11-28 07:39:13,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:13,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:13,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:13,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:13,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:13,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730fd302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13, skipping insertion in model container [2020-11-28 07:39:13,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:13,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:13,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:13,730 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:13,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:13,798 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:13,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13 WrapperNode [2020-11-28 07:39:13,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:13,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:13,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:13,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:13,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:13,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:13,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:13,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:13,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:13,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:13,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:13,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:13,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/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 [2020-11-28 07:39:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:39:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:39:14,590 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:14,590 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:39:14,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:14 BoogieIcfgContainer [2020-11-28 07:39:14,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:14,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:14,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:14,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:14,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:13" (1/3) ... [2020-11-28 07:39:14,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc17eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:14, skipping insertion in model container [2020-11-28 07:39:14,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (2/3) ... [2020-11-28 07:39:14,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc17eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:14, skipping insertion in model container [2020-11-28 07:39:14,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:14" (3/3) ... [2020-11-28 07:39:14,600 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-11-28 07:39:14,610 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:14,614 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:39:14,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:39:14,646 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:14,646 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:39:14,646 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:14,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:14,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:14,647 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:14,647 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:14,647 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-28 07:39:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:39:14,665 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:14,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:39:14,666 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash 6048728, now seen corresponding path program 1 times [2020-11-28 07:39:14,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:14,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182290856] [2020-11-28 07:39:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:14,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182290856] [2020-11-28 07:39:14,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:14,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:39:14,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208458071] [2020-11-28 07:39:14,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:39:14,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:39:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:39:14,871 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-11-28 07:39:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:14,883 INFO L93 Difference]: Finished difference Result 25 states and 40 transitions. [2020-11-28 07:39:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:39:14,885 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-28 07:39:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:14,895 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:39:14,895 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:39:14,898 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 [2020-11-28 07:39:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:39:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 07:39:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:39:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 39 transitions. [2020-11-28 07:39:14,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 39 transitions. Word has length 4 [2020-11-28 07:39:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:14,941 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 39 transitions. [2020-11-28 07:39:14,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:39:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 39 transitions. [2020-11-28 07:39:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:39:14,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:14,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:39:14,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:39:14,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash 182279791, now seen corresponding path program 1 times [2020-11-28 07:39:14,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:14,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197868752] [2020-11-28 07:39:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197868752] [2020-11-28 07:39:15,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:39:15,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909401755] [2020-11-28 07:39:15,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:39:15,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:39:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:15,011 INFO L87 Difference]: Start difference. First operand 24 states and 39 transitions. Second operand 3 states. [2020-11-28 07:39:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,018 INFO L93 Difference]: Finished difference Result 23 states and 38 transitions. [2020-11-28 07:39:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:39:15,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:39:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,021 INFO L225 Difference]: With dead ends: 23 [2020-11-28 07:39:15,021 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:39:15,022 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 [2020-11-28 07:39:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:39:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 07:39:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2020-11-28 07:39:15,030 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 5 [2020-11-28 07:39:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,031 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2020-11-28 07:39:15,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:39:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2020-11-28 07:39:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:39:15,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:39:15,034 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1360712232, now seen corresponding path program 1 times [2020-11-28 07:39:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859970804] [2020-11-28 07:39:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859970804] [2020-11-28 07:39:15,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640668218] [2020-11-28 07:39:15,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,139 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand 4 states. [2020-11-28 07:39:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,168 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2020-11-28 07:39:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:39:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,170 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:39:15,170 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 07:39:15,170 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 [2020-11-28 07:39:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 07:39:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 21. [2020-11-28 07:39:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2020-11-28 07:39:15,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 6 [2020-11-28 07:39:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,176 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2020-11-28 07:39:15,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2020-11-28 07:39:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:15,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:39:15,178 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash -767379772, now seen corresponding path program 1 times [2020-11-28 07:39:15,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475131865] [2020-11-28 07:39:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475131865] [2020-11-28 07:39:15,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447566937] [2020-11-28 07:39:15,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,252 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand 4 states. [2020-11-28 07:39:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,282 INFO L93 Difference]: Finished difference Result 37 states and 61 transitions. [2020-11-28 07:39:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:39:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,283 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:39:15,283 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 07:39:15,284 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 [2020-11-28 07:39:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 07:39:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 21. [2020-11-28 07:39:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 34 transitions. [2020-11-28 07:39:15,288 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 34 transitions. Word has length 7 [2020-11-28 07:39:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,288 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 34 transitions. [2020-11-28 07:39:15,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 34 transitions. [2020-11-28 07:39:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:39:15,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:39:15,289 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1981245181, now seen corresponding path program 1 times [2020-11-28 07:39:15,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681560057] [2020-11-28 07:39:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681560057] [2020-11-28 07:39:15,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688546226] [2020-11-28 07:39:15,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,353 INFO L87 Difference]: Start difference. First operand 21 states and 34 transitions. Second operand 4 states. [2020-11-28 07:39:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,372 INFO L93 Difference]: Finished difference Result 35 states and 56 transitions. [2020-11-28 07:39:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:39:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,373 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:39:15,373 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:39:15,373 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 [2020-11-28 07:39:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:39:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-11-28 07:39:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 33 transitions. [2020-11-28 07:39:15,377 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 33 transitions. Word has length 8 [2020-11-28 07:39:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,377 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 33 transitions. [2020-11-28 07:39:15,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 33 transitions. [2020-11-28 07:39:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:39:15,378 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:39:15,379 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1289273145, now seen corresponding path program 1 times [2020-11-28 07:39:15,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403485513] [2020-11-28 07:39:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403485513] [2020-11-28 07:39:15,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732180029] [2020-11-28 07:39:15,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,436 INFO L87 Difference]: Start difference. First operand 21 states and 33 transitions. Second operand 4 states. [2020-11-28 07:39:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,474 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2020-11-28 07:39:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:39:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,475 INFO L225 Difference]: With dead ends: 33 [2020-11-28 07:39:15,476 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 07:39:15,476 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 [2020-11-28 07:39:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 07:39:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2020-11-28 07:39:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2020-11-28 07:39:15,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 9 [2020-11-28 07:39:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,480 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2020-11-28 07:39:15,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2020-11-28 07:39:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:39:15,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:39:15,482 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1312976850, now seen corresponding path program 1 times [2020-11-28 07:39:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159965564] [2020-11-28 07:39:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159965564] [2020-11-28 07:39:15,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963673355] [2020-11-28 07:39:15,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,543 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand 4 states. [2020-11-28 07:39:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,567 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2020-11-28 07:39:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 07:39:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,569 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:39:15,569 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:39:15,569 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 [2020-11-28 07:39:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:39:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2020-11-28 07:39:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-11-28 07:39:15,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-11-28 07:39:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,573 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-11-28 07:39:15,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-11-28 07:39:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:39:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:39:15,574 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2047792046, now seen corresponding path program 1 times [2020-11-28 07:39:15,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237887940] [2020-11-28 07:39:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237887940] [2020-11-28 07:39:15,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776095632] [2020-11-28 07:39:15,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,640 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 4 states. [2020-11-28 07:39:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,660 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2020-11-28 07:39:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:39:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,661 INFO L225 Difference]: With dead ends: 29 [2020-11-28 07:39:15,662 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 07:39:15,662 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 [2020-11-28 07:39:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 07:39:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-11-28 07:39:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2020-11-28 07:39:15,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 11 [2020-11-28 07:39:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,666 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2020-11-28 07:39:15,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2020-11-28 07:39:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:39:15,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:39:15,667 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,668 INFO L82 PathProgramCache]: Analyzing trace with hash -942740313, now seen corresponding path program 1 times [2020-11-28 07:39:15,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246242647] [2020-11-28 07:39:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246242647] [2020-11-28 07:39:15,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669927991] [2020-11-28 07:39:15,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,708 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand 4 states. [2020-11-28 07:39:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,729 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2020-11-28 07:39:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 07:39:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,730 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:39:15,730 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:39:15,731 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 [2020-11-28 07:39:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:39:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-11-28 07:39:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2020-11-28 07:39:15,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2020-11-28 07:39:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,734 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2020-11-28 07:39:15,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2020-11-28 07:39:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:39:15,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:39:15,735 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 840037411, now seen corresponding path program 1 times [2020-11-28 07:39:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280294357] [2020-11-28 07:39:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280294357] [2020-11-28 07:39:15,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:15,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170753374] [2020-11-28 07:39:15,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:15,777 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand 4 states. [2020-11-28 07:39:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,796 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2020-11-28 07:39:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:15,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-28 07:39:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,796 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:39:15,797 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:39:15,797 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 [2020-11-28 07:39:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:39:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:39:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:39:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:39:15,797 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-11-28 07:39:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,798 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:39:15,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:39:15,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:39:15,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:39:15,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:39:15 BoogieIcfgContainer [2020-11-28 07:39:15,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:39:15,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:39:15,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:39:15,803 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:39:15,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:14" (3/4) ... [2020-11-28 07:39:15,806 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:39:15,817 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-28 07:39:15,818 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:39:15,818 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:39:15,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:39:15,877 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_92dc34e8-67f0-48da-9c12-bd92518930ae/bin/utaipan/witness.graphml [2020-11-28 07:39:15,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:39:15,889 INFO L168 Benchmark]: Toolchain (without parser) took 2414.04 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 85.8 MB in the beginning and 89.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:15,890 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:15,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.50 ms. Allocated memory is still 115.3 MB. Free memory was 85.8 MB in the beginning and 92.5 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:15,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.77 ms. Allocated memory is still 115.3 MB. Free memory was 92.5 MB in the beginning and 90.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:15,892 INFO L168 Benchmark]: Boogie Preprocessor took 47.60 ms. Allocated memory is still 115.3 MB. Free memory was 90.8 MB in the beginning and 89.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:15,892 INFO L168 Benchmark]: RCFGBuilder took 686.08 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 58.9 MB in the end (delta: 30.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:15,892 INFO L168 Benchmark]: TraceAbstraction took 1208.60 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 58.5 MB in the beginning and 93.5 MB in the end (delta: -35.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:15,893 INFO L168 Benchmark]: Witness Printer took 83.26 ms. Allocated memory is still 146.8 MB. Free memory was 93.5 MB in the beginning and 89.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:15,895 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.50 ms. Allocated memory is still 115.3 MB. Free memory was 85.8 MB in the beginning and 92.5 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.77 ms. Allocated memory is still 115.3 MB. Free memory was 92.5 MB in the beginning and 90.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.60 ms. Allocated memory is still 115.3 MB. Free memory was 90.8 MB in the beginning and 89.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 686.08 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 58.9 MB in the end (delta: 30.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1208.60 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 58.5 MB in the beginning and 93.5 MB in the end (delta: -35.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 83.26 ms. Allocated memory is still 146.8 MB. Free memory was 93.5 MB in the beginning and 89.3 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: 3]: 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, 25 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 313 SDtfs, 233 SDslu, 338 SDs, 0 SdLazy, 72 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 10 MinimizatonAttempts, 84 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 2901 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...